Stablecoin
Accept USDT payments
Loop Crypto is a USDT payment processor enabling USDC payments. Accepting subscription payments in USDT and USDT invoicing are simple with Loop.
USDT
Accept payments from the 500+ million stablecoin holders
$140 B
Market cap
65%
Market share
$80 B
daily volume
Accept USDT for every use case
USDT subscription payments
Accept recurring subscription payments in USDC with Loop’s crypto autopay functionality. Loop enables flexible billing cycles and automates your entire billing process.
Accept recurring subscription payments in USDC with Loop’s crypto autopay functionality. Loop enables flexible billing cycles and automates your entire billing process.
Accept recurring subscription payments in USDC with Loop’s crypto autopay functionality. Loop enables flexible billing cycles and automates your entire billing process.
USDC invoicing
Generate an invoice and allow customers to pay in USDC through a simple interface. Receive immediate notification upon payment with all transactions tracked in your Loop dashboard.
Generate an invoice and allow customers to pay in USDC through a simple interface. Receive immediate notification upon payment with all transactions tracked in your Loop dashboard.
Generate an invoice and allow customers to pay in USDC through a simple interface. Receive immediate notification upon payment with all transactions tracked in your Loop dashboard.
USDT checkout
Embed a USDT payment gateway directly within your website. Allow customers to sign up and send USDT payments in seconds.
Embed a USDT payment gateway directly within your website. Allow customers to sign up and send USDT payments in seconds.
Embed a USDT payment gateway directly within your website. Allow customers to sign up and send USDT payments in seconds.
USDC payment API
Customize your implementation of USDC payments with a flexible API that can be integrated into your existing checkout experience.
Customize your implementation of USDC payments with a flexible API that can be integrated into your existing checkout experience.
Customize your implementation of USDC payments with a flexible API that can be integrated into your existing checkout experience.
USDT payment links
Send payment links directly to customers to accept USDC payments.
Send payment links directly to customers to accept USDC payments.
Send payment links directly to customers to accept USDC payments.
USDC integrated into your payment system
Unlock USDC payments for your merchants with a flexible API and payment component that abstract away all the complexities of crypto payments.
Unlock USDC payments for your merchants with a flexible API and payment component that abstract away all the complexities of crypto payments.
Unlock USDC payments for your merchants with a flexible API and payment component that abstract away all the complexities of crypto payments.
FAQs
FAQs
FAQs
USDT Payments
We have answers. If you don't see your question, reach out to hello@loopcrypto.xyz
What is USDT?
USDT is a dollar-based stablecoin. For every USDT token in circulation, there is an equivalent US dollar held in reserve, typically in the form of a bank deposit or US Treasury bill. The Circle Consortium, composed of Circle and Coinbase, maintains this 1:1 value ratio through a process of minting new USDC tokens when a new dollar is deposited and then burning (or permanently removing) a USDC token from circulation when a USDC token is redeemed. This maintains the peg to the US dollar. This underlying peg to the US dollar minimizes the price volatility associated with other cryptocurrencies, making USDC a reliable payment option, especially in emerging market economies where access to stable currencies can be challenging.
What is USDT?
USDT is a dollar-based stablecoin. For every USDT token in circulation, there is an equivalent US dollar held in reserve, typically in the form of a bank deposit or US Treasury bill. The Circle Consortium, composed of Circle and Coinbase, maintains this 1:1 value ratio through a process of minting new USDC tokens when a new dollar is deposited and then burning (or permanently removing) a USDC token from circulation when a USDC token is redeemed. This maintains the peg to the US dollar. This underlying peg to the US dollar minimizes the price volatility associated with other cryptocurrencies, making USDC a reliable payment option, especially in emerging market economies where access to stable currencies can be challenging.
What is USDT?
USDT is a dollar-based stablecoin. For every USDT token in circulation, there is an equivalent US dollar held in reserve, typically in the form of a bank deposit or US Treasury bill. The Circle Consortium, composed of Circle and Coinbase, maintains this 1:1 value ratio through a process of minting new USDC tokens when a new dollar is deposited and then burning (or permanently removing) a USDC token from circulation when a USDC token is redeemed. This maintains the peg to the US dollar. This underlying peg to the US dollar minimizes the price volatility associated with other cryptocurrencies, making USDC a reliable payment option, especially in emerging market economies where access to stable currencies can be challenging.
Why accept USDT as a merchant?
Accepting USDC as a merchant offers significant advantages. USDC expands the market reach of businesses by appealing to a global customer base and tech-savvy individuals who prefer crypto payments. There are over 500 million holders of stablecoins globally, and 1 in 3 consumers who hold cryptocurrency have made a payment with a stablecoin. Unlike other cryptocurrencies, USDC is stable with little to no volatility as it is pegged to the US dollar. Its operation on multiple blockchain networks and compliance with regulations provide added transparency and trust. Ultimately, USDC is a great payment option for businesses looking to scale their digital commerce channels by offering a globally interoperable payment option to their customers.
Furthermore, USDC transactions boast lower fees and faster processing times compared to traditional methods like credit cards, with near-instant global transactions and no risk of chargebacks. This not only reduces costs but also provides greater security for merchants.
Why accept USDT as a merchant?
Accepting USDC as a merchant offers significant advantages. USDC expands the market reach of businesses by appealing to a global customer base and tech-savvy individuals who prefer crypto payments. There are over 500 million holders of stablecoins globally, and 1 in 3 consumers who hold cryptocurrency have made a payment with a stablecoin. Unlike other cryptocurrencies, USDC is stable with little to no volatility as it is pegged to the US dollar. Its operation on multiple blockchain networks and compliance with regulations provide added transparency and trust. Ultimately, USDC is a great payment option for businesses looking to scale their digital commerce channels by offering a globally interoperable payment option to their customers.
Furthermore, USDC transactions boast lower fees and faster processing times compared to traditional methods like credit cards, with near-instant global transactions and no risk of chargebacks. This not only reduces costs but also provides greater security for merchants.
Why accept USDT as a merchant?
Accepting USDC as a merchant offers significant advantages. USDC expands the market reach of businesses by appealing to a global customer base and tech-savvy individuals who prefer crypto payments. There are over 500 million holders of stablecoins globally, and 1 in 3 consumers who hold cryptocurrency have made a payment with a stablecoin. Unlike other cryptocurrencies, USDC is stable with little to no volatility as it is pegged to the US dollar. Its operation on multiple blockchain networks and compliance with regulations provide added transparency and trust. Ultimately, USDC is a great payment option for businesses looking to scale their digital commerce channels by offering a globally interoperable payment option to their customers.
Furthermore, USDC transactions boast lower fees and faster processing times compared to traditional methods like credit cards, with near-instant global transactions and no risk of chargebacks. This not only reduces costs but also provides greater security for merchants.
What can you do with USDT?
USD has a wide range of applications, making it a versatile tool in the digital economy. It is commonly used for payments, settlement, and remittances, allowing individuals and businesses to transfer funds quickly and affordably both domestically and across borders without the high fees or delays associated with traditional banking systems. Its stability, being pegged 1:1 to the U.S. dollar, ensures that users can avoid the volatility of other cryptocurrencies while conducting transactions. Additionally, USDC is widely accepted on cryptocurrency exchanges, enabling seamless trading, investing, and conversion between digital assets without needing to cash out into fiat currency.
In decentralized finance (DeFi), USDC plays a pivotal role in various applications such as lending, borrowing, yield farming, and liquidity provision. Users can lend their USDC to earn interest or borrow it by providing other crypto assets as collateral. It is also used in liquidity pools on decentralized exchanges (DEXs), allowing users to earn rewards from transaction fees. Beyond DeFi, USDC can be used for hedging against inflation, crowdfunding, and paying employees in crypto while avoiding price swings. Its multi-chain compatibility further enhances its usability across different blockchain ecosystems, making it a reliable and efficient digital dollar for diverse financial activities.
What can you do with USDT?
USD has a wide range of applications, making it a versatile tool in the digital economy. It is commonly used for payments, settlement, and remittances, allowing individuals and businesses to transfer funds quickly and affordably both domestically and across borders without the high fees or delays associated with traditional banking systems. Its stability, being pegged 1:1 to the U.S. dollar, ensures that users can avoid the volatility of other cryptocurrencies while conducting transactions. Additionally, USDC is widely accepted on cryptocurrency exchanges, enabling seamless trading, investing, and conversion between digital assets without needing to cash out into fiat currency.
In decentralized finance (DeFi), USDC plays a pivotal role in various applications such as lending, borrowing, yield farming, and liquidity provision. Users can lend their USDC to earn interest or borrow it by providing other crypto assets as collateral. It is also used in liquidity pools on decentralized exchanges (DEXs), allowing users to earn rewards from transaction fees. Beyond DeFi, USDC can be used for hedging against inflation, crowdfunding, and paying employees in crypto while avoiding price swings. Its multi-chain compatibility further enhances its usability across different blockchain ecosystems, making it a reliable and efficient digital dollar for diverse financial activities.
What can you do with USDT?
USD has a wide range of applications, making it a versatile tool in the digital economy. It is commonly used for payments, settlement, and remittances, allowing individuals and businesses to transfer funds quickly and affordably both domestically and across borders without the high fees or delays associated with traditional banking systems. Its stability, being pegged 1:1 to the U.S. dollar, ensures that users can avoid the volatility of other cryptocurrencies while conducting transactions. Additionally, USDC is widely accepted on cryptocurrency exchanges, enabling seamless trading, investing, and conversion between digital assets without needing to cash out into fiat currency.
In decentralized finance (DeFi), USDC plays a pivotal role in various applications such as lending, borrowing, yield farming, and liquidity provision. Users can lend their USDC to earn interest or borrow it by providing other crypto assets as collateral. It is also used in liquidity pools on decentralized exchanges (DEXs), allowing users to earn rewards from transaction fees. Beyond DeFi, USDC can be used for hedging against inflation, crowdfunding, and paying employees in crypto while avoiding price swings. Its multi-chain compatibility further enhances its usability across different blockchain ecosystems, making it a reliable and efficient digital dollar for diverse financial activities.
What is a USDT payment?
A USDC payment simply refers to a transaction where a customer, both retail and other businesses, uses USDC to make a payment to a business. Unlike traditional payment methods, USDC transactions settle almost instantly and have minimized price volatility compared to other cryptocurrencies, making it a reliable digital currency for businesses and individuals. Individuals can send funds directly between wallets whereas businesses typically utilize a USDC payment gateway to simplify the process and abstract away the complexities of on-chain payments.
What is a USDT payment?
A USDC payment simply refers to a transaction where a customer, both retail and other businesses, uses USDC to make a payment to a business. Unlike traditional payment methods, USDC transactions settle almost instantly and have minimized price volatility compared to other cryptocurrencies, making it a reliable digital currency for businesses and individuals. Individuals can send funds directly between wallets whereas businesses typically utilize a USDC payment gateway to simplify the process and abstract away the complexities of on-chain payments.
What is a USDT payment?
A USDC payment simply refers to a transaction where a customer, both retail and other businesses, uses USDC to make a payment to a business. Unlike traditional payment methods, USDC transactions settle almost instantly and have minimized price volatility compared to other cryptocurrencies, making it a reliable digital currency for businesses and individuals. Individuals can send funds directly between wallets whereas businesses typically utilize a USDC payment gateway to simplify the process and abstract away the complexities of on-chain payments.
How to accept a USDT payment as a merchant?
For merchants looking to include USDC as a payment method, adding a USDC payment processor is the simplest approach to begin accepting USDC payments. There are specialized USDC payment gateways, like Loop Crypto, that enable subscription payments in USDC and USDC invoicing. These solutions enable businesses to manage USDC payments at scale and typically include all of the functionality like receipts, automated reminders, and late payment notices that businesses are accustomed to with traditional payment methods.
How to accept a USDT payment as a merchant?
For merchants looking to include USDC as a payment method, adding a USDC payment processor is the simplest approach to begin accepting USDC payments. There are specialized USDC payment gateways, like Loop Crypto, that enable subscription payments in USDC and USDC invoicing. These solutions enable businesses to manage USDC payments at scale and typically include all of the functionality like receipts, automated reminders, and late payment notices that businesses are accustomed to with traditional payment methods.
How to accept a USDT payment as a merchant?
For merchants looking to include USDC as a payment method, adding a USDC payment processor is the simplest approach to begin accepting USDC payments. There are specialized USDC payment gateways, like Loop Crypto, that enable subscription payments in USDC and USDC invoicing. These solutions enable businesses to manage USDC payments at scale and typically include all of the functionality like receipts, automated reminders, and late payment notices that businesses are accustomed to with traditional payment methods.
How to integrate USDT payments as a payment processor?
To integrate USDC payments into your platform as a payment processor you will need a flexible suite of APIs and components that allow you to add blockchain payments while abstracting away any complexity. Loop’s API and components make it easy to add USDC payments with a simple implementation.
How to integrate USDT payments as a payment processor?
To integrate USDC payments into your platform as a payment processor you will need a flexible suite of APIs and components that allow you to add blockchain payments while abstracting away any complexity. Loop’s API and components make it easy to add USDC payments with a simple implementation.
How to integrate USDT payments as a payment processor?
To integrate USDC payments into your platform as a payment processor you will need a flexible suite of APIs and components that allow you to add blockchain payments while abstracting away any complexity. Loop’s API and components make it easy to add USDC payments with a simple implementation.
What is a USDT payment gateway?
A USDC payment gateway is a digital platform that enables businesses to accept payments in USDC while removing the complexity of interacting with a blockchain. Using a gateway simplifies the implementation processing for accepting USDC.
What is a USDT payment gateway?
A USDC payment gateway is a digital platform that enables businesses to accept payments in USDC while removing the complexity of interacting with a blockchain. Using a gateway simplifies the implementation processing for accepting USDC.
What is a USDT payment gateway?
A USDC payment gateway is a digital platform that enables businesses to accept payments in USDC while removing the complexity of interacting with a blockchain. Using a gateway simplifies the implementation processing for accepting USDC.
How does Loop enable me to accept USDT payments?
Loop is designed for both payment providers and merchants. The product offers flexible APIs and an out-of-the-box USDC payment gateway solution that makes it easy to start accepting USDC payments.
Loop plays an important role in enabling businesses to accept and process USDC payments. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for USDC across multiple blockchains.
How does Loop enable me to accept USDT payments?
Loop is designed for both payment providers and merchants. The product offers flexible APIs and an out-of-the-box USDC payment gateway solution that makes it easy to start accepting USDC payments.
Loop plays an important role in enabling businesses to accept and process USDC payments. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for USDC across multiple blockchains.
How does Loop enable me to accept USDT payments?
Loop is designed for both payment providers and merchants. The product offers flexible APIs and an out-of-the-box USDC payment gateway solution that makes it easy to start accepting USDC payments.
Loop plays an important role in enabling businesses to accept and process USDC payments. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for USDC across multiple blockchains.
What companies support USDT as a payment method?
We are seeing more and more companies begin to accept USDC as payment. Large technology companies like Amazon and Google do not yet accept USDC, but other firms like Microsoft accept USDC payments and other cryptocurrencies.
What companies support USDT as a payment method?
We are seeing more and more companies begin to accept USDC as payment. Large technology companies like Amazon and Google do not yet accept USDC, but other firms like Microsoft accept USDC payments and other cryptocurrencies.
What companies support USDT as a payment method?
We are seeing more and more companies begin to accept USDC as payment. Large technology companies like Amazon and Google do not yet accept USDC, but other firms like Microsoft accept USDC payments and other cryptocurrencies.
How can I buy USDT?
You can buy USDC through various platforms using fiat currency via credit or debit cards, bank transfers, or popular apps like Apple or Google Pay. Crypto exchanges like Coinbase, Binance, and Kraken are popular options for purchasing USDC.
How can I buy USDT?
You can buy USDC through various platforms using fiat currency via credit or debit cards, bank transfers, or popular apps like Apple or Google Pay. Crypto exchanges like Coinbase, Binance, and Kraken are popular options for purchasing USDC.
How can I buy USDT?
You can buy USDC through various platforms using fiat currency via credit or debit cards, bank transfers, or popular apps like Apple or Google Pay. Crypto exchanges like Coinbase, Binance, and Kraken are popular options for purchasing USDC.
Loop Crypto
Loop Crypto
Loop Crypto
Loop Crypto is a USDC payment processor that allows you to accept USDC payments across any EVM blockchain or Solana. We make it easy to accept subscription payments in USDC and also support a range of other use cases including USDC invoicing.
Loop Crypto is a USDC payment processor that allows you to accept USDC payments across any EVM blockchain or Solana. We make it easy to accept subscription payments in USDC and also support a range of other use cases including USDC invoicing.
Loop Crypto is a USDC payment processor that allows you to accept USDC payments across any EVM blockchain or Solana. We make it easy to accept subscription payments in USDC and also support a range of other use cases including USDC invoicing.
Networks
Available across all EVM chains and Solana
Networks
Available across all EVM chains and Solana
Networks
Available across all EVM chains and Solana
Tokens
Support for any ERC-20 or SPL token
Tokens
Support for any ERC-20 or SPL token
Tokens
Support for any ERC-20 or SPL token
Payment types
Unlock any use case including crypto subscription payments, invoicing, and donations
Payment types
Unlock any use case including crypto subscription payments, invoicing, and donations
Payment types
Unlock any use case including crypto subscription payments, invoicing, and donations
API
Flexible crypto payment API to support any payment model
API
Flexible crypto payment API to support any payment model
API
Flexible crypto payment API to support any payment model
Payment service providers
Integrate crypto payments your payment systems
Payment service providers
Integrate crypto payments your payment systems
Payment service providers
Integrate crypto payments your payment systems
Integrations
Use with existing payment systems like Stripe and OpenPay
Integrations
Use with existing payment systems like Stripe and OpenPay
Integrations
Use with existing payment systems like Stripe and OpenPay
FAQs
Have questions?
We have answers. If you don't see your question, reach out to hello@loopcrypto.xyz
Loop Basics
Networks and Tokens
Functionality
Crypto Basics
What is Loop?
Loop is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms unlock crypto and stablecoin payments. We provide all of the tools you need to accept crypto, from charging a wallet to storing payment methods to settling in fiat.
What is a crypto payment processor?
A crypto payment processor facilitates digital transactions between merchants and their customers enabling merchants to accept various forms of crypto payment. With Loop, we make it easy to accept stablecoins, ERC-20 tokens (tokens deployed within the Ethereum ecosystem and popular layer 2 networks), or SPL tokens (tokens deployed within the Solana ecosystem).
Merchants that accept crypto payments need to work through various complexities related to accepting payment on multiple networks, in multiple tokens, and from various types of wallets. Loop handles this complexity and provides APIs and tooling that are easy to use. This allows for the secure and quick transfer of funds from the customer’s wallet to the merchant’s wallet
What does a crypto payment processor do?
Loop plays an important role in enabling businesses to accept and process various forms of crypto payment from customers. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for multiple currencies and payment methods.
How does Loop work as a payment processor?
Loop works similarly to traditional payment processors making it easy for merchants to accept crypto payments from customers. To understand how Loop works, here is what a typical payment flow looks like:
Customer initiates payment
When a customer makes a purchase, they sign a transaction from their wallet providing the business with authorization and approval to charge them for a specific token on a specific network. This authorization can occur using a Loop payment link, our pay component, or by sending a transaction directly onchain.
Transaction data
Loop receives transaction data about the payment such as amount and due date is sent to Loop.
Authorization check
Loop reviews the transaction details and checks if the customer has sufficient funds and approval available. It also confirms the authenticity of the transaction data, checking its signature against that of the merchant requesting payment.
Transaction execution
If the transaction is authorized and the payment is due, Loop sends an onchain transaction, facilitating the payment from the customer’s wallet to the merchant’s wallet based on the details of the transaction data.
Transaction completion
Once the transaction is processed on-chain, Loop notifies the merchant of the payment and the merchant delivers the goods or services to the customer.
Settlement
If the merchant has elected to settle in crypto, the transaction is complete. If the merchant has elected to settle in fiat, the transferring funds from the wallet to the merchant account may take a few days depending on the fiat currency and countries involved.
How do you manage the volatility of accepting payment in crypto?
By default, Loop denominates or anchors all pricing to the US dollar at the time of purchase. For example, if you are buying a product that is $100 and paying in ETH, Loop will ping a pricing oracle at the time of purchase and charge you the equivalent amount of ETH at that moment in time. If you are using Loop to pay for a recurring monthly subscription, Loop checks the pricing oracle each month at the time of the next payment and pulls the amount of ETH equivalent to $100.
Of course, to eliminate any exposure to potentially volatile crypto assets, merchants can always simply accept stablecoins like USDC and USDT. Loop enables merchants to configure the tokens they accept, so merchants are able to opt to only accept stablecoins, or one particular stablecoin, if desired.
What if I want to denominate my product’s price in a token value?
If you want to denominate your product’s price in a token like ETH or ARB, for example, Loop supports that functionality as well. In this scenario, your product’s price could be set to 1 ETH. For a recurring monthly subscription, Loop will process a payment for 1 ETH each month regardless of any price moments in ETH.
Do customers need to lock up funds?
No, Loop never custodies any funds. As a payment processor, Loop provides authorization and facilitates the movement of funds from the customer’s wallet to the merchant’s wallet, never custodying the funds.
What if the customer doesn’t have enough funds to pay?
Loop does all the hard work of ensuring a payment occurs so you don't have to. Before a payment is due, we notify the customer if their balance is too low.
If the issue isn't resolved by the due date, we send a webhook to the company notifying them of the missed payment.
We will keep attempting the payment method until the company directs us to stop.
Who is the team behind Loop?
Eleni Steinman and Shane van Coller are the founders of Loop Crypto. Veterans of the crypto space who have been building together since 2018, Eleni and Shane started Loop to solve their own challenges of accepting crypto payments while at a prior startup.
What networks do you support?
We provide support across all EVM (Ethereum Virtual Machine) chains and Solana. Since there are over 300 networks, we have a default list of the most popular networks that we present to merchants. However, a merchant can add any EVM network or Solana upon request.
Our default list of networks is: Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. For testing purposes, we also support Sepolia (Ethereum testnet) and Solana Devnet.
What tokens do you support?
For EVM networks, we support all ERC-20 tokens and native tokens for one-time payments and invoicing. For Solana, we support all SPL tokens.
Please note, while Loop works with any token, if you would like to price in fiat and accept in a token, we will need a price feed. We currently use CoinMarketCap as our price feed.
Does Loop support payments in ETH?
Yes! Loop supports the native Ethereum token, ETH, for one-time payments and invoicing. For subscriptions, Loop supports the wrapped version of ETH known as WETH.
Does Loop support Bitcoin?
No. Bitcoin is only available on the Bitcoin network. However, Loop does support wrapped versions of Bitcoin that exist on EVM networks and on the Solana network.
Does Loop work with payments on Solana?
Yes! Loop supports the Solana network, both mainnet and its test network.
Do you off-ramp?
Yes! Loop allows merchants to settle in either fiat or crypto. Please reach out to hello@loopcrypto.xyz to learn more about the countries and fiat currencies we support for offramping.
Do you work with subscriptions?
Yes! Loop works with recurring subscription payments. We work similar to credit cards - a customer authorizes their wallet to be charged, and each billing period the wallet is charged without the end customer having to take action.
Do you work with one-time purchases?
Yes! Loop works with one-time purchases. Customers can authorize payment for only one purchase.
Do you work with invoicing?
Yes! Loop works with invoicing purchases. Customers can pay an invoice with Loop.
Do you work with top-ups?
Yes! Loop allows customers to pre-pay for credits.
Do you have payment notifications?
Yes! We send receipts and payment reminders to the end customer both before a payment is due and after a payment has been confirmed.
What wallets do you support?
Loop supports over 500 wallets, including MetaMask, Coinbase Wallet, and Rainbow wallet. Loop works with all non-custodial wallets, including MPC wallets and smart wallets. Loop does not support payments from an exchange account today but will in the future. If this is functionality you need, please reach out to hello@loopcrypto.xyz.
What integrations does Loop offer?
Yes! Loop offers a range of integrations with existing payment processors and subscription management tooling including Stripe, Chargebee, and OpenPay.
Does Loop enable fiat payments?
While Loop does not directly handle fiat payments, you can accept fiat payments through one of our integrated solutions. For example, merchants looking to accept subscription payments in both fiat and crypto can utilize Loop’s native integration with OpenPay.
What is an ERC-20 token?
ERC-20 token is a token standard with predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
The ERC-20 token standard is the most widely used standard for fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. This makes ERC20 tokens useful for things like a medium of exchange currency.
Most, if not all tokens on EVM compatible networks are ERC-20 tokens. Example tokens are USDC, USDT and Dai.
A network's native token (e.g. ETH, SOL, MATIC) is not ERC-20 and USDT on Ethereum is not fully ERC-20 compliant. Wrapped versions of native tokens exist which are ERC-20 (e.g. wETH, wSol, wMatic).
What is an SPL token?
An SPL token is Solana’s version of the ERC-20 standard. It refers to predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
What is a wrapped token?
Wrapped tokens are tokens backed one-to-one by an underlying asset, typically native to another blockchain or asset. By creating a wrapped version of a token, the user is able to track the value of the underlying token while enabling additional functionality like being used on another network.
A common example is "wrapped Bitcoin" (wBTC), which allows Bitcoin to be used on the Ethereum blockchain and wETH which allows ETH to follow the ERC-20 standard. The process of creating a wrapped token involves securing the original asset in a digital vault and minting a new token. This new token mirrors the value of the original asset and can be used on the blockchain it was minted on.
How do you get wrapped tokens?
Loop allows natively on our payment links for customers to wrap their ETH before payment. Customers can also wrap tokens using any on-chain exchange like Uniswap.
Why do you need wrapped tokens?
Native network tokens (e.g. ETH, MATIC) do not adhere to the ERC-20 standard and do not provide the functionality necessary for recurring payments, their wrapped version allows customers to use this token for payment.
Ready to get started?
Fill out our form, pay, and we will get you set up in 1 business day or schedule a call and we can walk you through a demo and chat implementation.
Get started
Loop Crypto is a crypto payment processor — our full suite APIs provide merchants and payment providers all the tools they need to grow their revenue.
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FAQs
FAQs
Have questions?
We have answers. If you don't see your question, reach out to hello@loopcrypto.xyz
Loop Basics
Networks and Tokens
Functionality
Crypto Basics
What is Loop?
Loop is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms unlock crypto and stablecoin payments. We provide all of the tools you need to accept crypto, from charging a wallet to storing payment methods to settling in fiat.
What is a crypto payment processor?
A crypto payment processor facilitates digital transactions between merchants and their customers enabling merchants to accept various forms of crypto payment. With Loop, we make it easy to accept stablecoins, ERC-20 tokens (tokens deployed within the Ethereum ecosystem and popular layer 2 networks), or SPL tokens (tokens deployed within the Solana ecosystem).
Merchants that accept crypto payments need to work through various complexities related to accepting payment on multiple networks, in multiple tokens, and from various types of wallets. Loop handles this complexity and provides APIs and tooling that are easy to use. This allows for the secure and quick transfer of funds from the customer’s wallet to the merchant’s wallet
What does a crypto payment processor do?
Loop plays an important role in enabling businesses to accept and process various forms of crypto payment from customers. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for multiple currencies and payment methods.
How does Loop work as a payment processor?
Loop works similarly to traditional payment processors making it easy for merchants to accept crypto payments from customers. To understand how Loop works, here is what a typical payment flow looks like:
Customer initiates payment
When a customer makes a purchase, they sign a transaction from their wallet providing the business with authorization and approval to charge them for a specific token on a specific network. This authorization can occur using a Loop payment link, our pay component, or by sending a transaction directly onchain.
Transaction data
Loop receives transaction data about the payment such as amount and due date is sent to Loop.
Authorization check
Loop reviews the transaction details and checks if the customer has sufficient funds and approval available. It also confirms the authenticity of the transaction data, checking its signature against that of the merchant requesting payment.
Transaction execution
If the transaction is authorized and the payment is due, Loop sends an onchain transaction, facilitating the payment from the customer’s wallet to the merchant’s wallet based on the details of the transaction data.
Transaction completion
Once the transaction is processed on-chain, Loop notifies the merchant of the payment and the merchant delivers the goods or services to the customer.
Settlement
If the merchant has elected to settle in crypto, the transaction is complete. If the merchant has elected to settle in fiat, the transferring funds from the wallet to the merchant account may take a few days depending on the fiat currency and countries involved.
How do you manage the volatility of accepting payment in crypto?
By default, Loop denominates or anchors all pricing to the US dollar at the time of purchase. For example, if you are buying a product that is $100 and paying in ETH, Loop will ping a pricing oracle at the time of purchase and charge you the equivalent amount of ETH at that moment in time. If you are using Loop to pay for a recurring monthly subscription, Loop checks the pricing oracle each month at the time of the next payment and pulls the amount of ETH equivalent to $100.
Of course, to eliminate any exposure to potentially volatile crypto assets, merchants can always simply accept stablecoins like USDC and USDT. Loop enables merchants to configure the tokens they accept, so merchants are able to opt to only accept stablecoins, or one particular stablecoin, if desired.
What if I want to denominate my product’s price in a token value?
If you want to denominate your product’s price in a token like ETH or ARB, for example, Loop supports that functionality as well. In this scenario, your product’s price could be set to 1 ETH. For a recurring monthly subscription, Loop will process a payment for 1 ETH each month regardless of any price moments in ETH.
Do customers need to lock up funds?
No, Loop never custodies any funds. As a payment processor, Loop provides authorization and facilitates the movement of funds from the customer’s wallet to the merchant’s wallet, never custodying the funds.
What if the customer doesn’t have enough funds to pay?
Loop does all the hard work of ensuring a payment occurs so you don't have to. Before a payment is due, we notify the customer if their balance is too low.
If the issue isn't resolved by the due date, we send a webhook to the company notifying them of the missed payment.
We will keep attempting the payment method until the company directs us to stop.
Who is the team behind Loop?
Eleni Steinman and Shane van Coller are the founders of Loop Crypto. Veterans of the crypto space who have been building together since 2018, Eleni and Shane started Loop to solve their own challenges of accepting crypto payments while at a prior startup.
What networks do you support?
We provide support across all EVM (Ethereum Virtual Machine) chains and Solana. Since there are over 300 networks, we have a default list of the most popular networks that we present to merchants. However, a merchant can add any EVM network or Solana upon request.
Our default list of networks is: Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. For testing purposes, we also support Sepolia (Ethereum testnet) and Solana Devnet.
What tokens do you support?
For EVM networks, we support all ERC-20 tokens and native tokens for one-time payments and invoicing. For Solana, we support all SPL tokens.
Please note, while Loop works with any token, if you would like to price in fiat and accept in a token, we will need a price feed. We currently use CoinMarketCap as our price feed.
Does Loop support payments in ETH?
Yes! Loop supports the native Ethereum token, ETH, for one-time payments and invoicing. For subscriptions, Loop supports the wrapped version of ETH known as WETH.
Does Loop support Bitcoin?
No. Bitcoin is only available on the Bitcoin network. However, Loop does support wrapped versions of Bitcoin that exist on EVM networks and on the Solana network.
Does Loop work with payments on Solana?
Yes! Loop supports the Solana network, both mainnet and its test network.
Do you off-ramp?
Yes! Loop allows merchants to settle in either fiat or crypto. Please reach out to hello@loopcrypto.xyz to learn more about the countries and fiat currencies we support for offramping.
Do you work with subscriptions?
Yes! Loop works with recurring subscription payments. We work similar to credit cards - a customer authorizes their wallet to be charged, and each billing period the wallet is charged without the end customer having to take action.
Do you work with one-time purchases?
Yes! Loop works with one-time purchases. Customers can authorize payment for only one purchase.
Do you work with invoicing?
Yes! Loop works with invoicing purchases. Customers can pay an invoice with Loop.
Do you work with top-ups?
Yes! Loop allows customers to pre-pay for credits.
Do you have payment notifications?
Yes! We send receipts and payment reminders to the end customer both before a payment is due and after a payment has been confirmed.
What wallets do you support?
Loop supports over 500 wallets, including MetaMask, Coinbase Wallet, and Rainbow wallet. Loop works with all non-custodial wallets, including MPC wallets and smart wallets. Loop does not support payments from an exchange account today but will in the future. If this is functionality you need, please reach out to hello@loopcrypto.xyz.
What integrations does Loop offer?
Yes! Loop offers a range of integrations with existing payment processors and subscription management tooling including Stripe, Chargebee, and OpenPay.
Does Loop enable fiat payments?
While Loop does not directly handle fiat payments, you can accept fiat payments through one of our integrated solutions. For example, merchants looking to accept subscription payments in both fiat and crypto can utilize Loop’s native integration with OpenPay.
What is an ERC-20 token?
ERC-20 token is a token standard with predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
The ERC-20 token standard is the most widely used standard for fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. This makes ERC20 tokens useful for things like a medium of exchange currency.
Most, if not all tokens on EVM compatible networks are ERC-20 tokens. Example tokens are USDC, USDT and Dai.
A network's native token (e.g. ETH, SOL, MATIC) is not ERC-20 and USDT on Ethereum is not fully ERC-20 compliant. Wrapped versions of native tokens exist which are ERC-20 (e.g. wETH, wSol, wMatic).
What is an SPL token?
An SPL token is Solana’s version of the ERC-20 standard. It refers to predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
What is a wrapped token?
Wrapped tokens are tokens backed one-to-one by an underlying asset, typically native to another blockchain or asset. By creating a wrapped version of a token, the user is able to track the value of the underlying token while enabling additional functionality like being used on another network.
A common example is "wrapped Bitcoin" (wBTC), which allows Bitcoin to be used on the Ethereum blockchain and wETH which allows ETH to follow the ERC-20 standard. The process of creating a wrapped token involves securing the original asset in a digital vault and minting a new token. This new token mirrors the value of the original asset and can be used on the blockchain it was minted on.
How do you get wrapped tokens?
Loop allows natively on our payment links for customers to wrap their ETH before payment. Customers can also wrap tokens using any on-chain exchange like Uniswap.
Why do you need wrapped tokens?
Native network tokens (e.g. ETH, MATIC) do not adhere to the ERC-20 standard and do not provide the functionality necessary for recurring payments, their wrapped version allows customers to use this token for payment.
Loop Basics
Networks and Tokens
Functionality
Crypto Basics
What is Loop?
Loop is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms unlock crypto and stablecoin payments. We provide all of the tools you need to accept crypto, from charging a wallet to storing payment methods to settling in fiat.
What is a crypto payment processor?
A crypto payment processor facilitates digital transactions between merchants and their customers enabling merchants to accept various forms of crypto payment. With Loop, we make it easy to accept stablecoins, ERC-20 tokens (tokens deployed within the Ethereum ecosystem and popular layer 2 networks), or SPL tokens (tokens deployed within the Solana ecosystem).
Merchants that accept crypto payments need to work through various complexities related to accepting payment on multiple networks, in multiple tokens, and from various types of wallets. Loop handles this complexity and provides APIs and tooling that are easy to use. This allows for the secure and quick transfer of funds from the customer’s wallet to the merchant’s wallet
What does a crypto payment processor do?
Loop plays an important role in enabling businesses to accept and process various forms of crypto payment from customers. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for multiple currencies and payment methods.
How does Loop work as a payment processor?
Loop works similarly to traditional payment processors making it easy for merchants to accept crypto payments from customers. To understand how Loop works, here is what a typical payment flow looks like:
Customer initiates payment
When a customer makes a purchase, they sign a transaction from their wallet providing the business with authorization and approval to charge them for a specific token on a specific network. This authorization can occur using a Loop payment link, our pay component, or by sending a transaction directly onchain.
Transaction data
Loop receives transaction data about the payment such as amount and due date is sent to Loop.
Authorization check
Loop reviews the transaction details and checks if the customer has sufficient funds and approval available. It also confirms the authenticity of the transaction data, checking its signature against that of the merchant requesting payment.
Transaction execution
If the transaction is authorized and the payment is due, Loop sends an onchain transaction, facilitating the payment from the customer’s wallet to the merchant’s wallet based on the details of the transaction data.
Transaction completion
Once the transaction is processed on-chain, Loop notifies the merchant of the payment and the merchant delivers the goods or services to the customer.
Settlement
If the merchant has elected to settle in crypto, the transaction is complete. If the merchant has elected to settle in fiat, the transferring funds from the wallet to the merchant account may take a few days depending on the fiat currency and countries involved.
How do you manage the volatility of accepting payment in crypto?
By default, Loop denominates or anchors all pricing to the US dollar at the time of purchase. For example, if you are buying a product that is $100 and paying in ETH, Loop will ping a pricing oracle at the time of purchase and charge you the equivalent amount of ETH at that moment in time. If you are using Loop to pay for a recurring monthly subscription, Loop checks the pricing oracle each month at the time of the next payment and pulls the amount of ETH equivalent to $100.
Of course, to eliminate any exposure to potentially volatile crypto assets, merchants can always simply accept stablecoins like USDC and USDT. Loop enables merchants to configure the tokens they accept, so merchants are able to opt to only accept stablecoins, or one particular stablecoin, if desired.
What if I want to denominate my product’s price in a token value?
If you want to denominate your product’s price in a token like ETH or ARB, for example, Loop supports that functionality as well. In this scenario, your product’s price could be set to 1 ETH. For a recurring monthly subscription, Loop will process a payment for 1 ETH each month regardless of any price moments in ETH.
Do customers need to lock up funds?
No, Loop never custodies any funds. As a payment processor, Loop provides authorization and facilitates the movement of funds from the customer’s wallet to the merchant’s wallet, never custodying the funds.
What if the customer doesn’t have enough funds to pay?
Loop does all the hard work of ensuring a payment occurs so you don't have to. Before a payment is due, we notify the customer if their balance is too low.
If the issue isn't resolved by the due date, we send a webhook to the company notifying them of the missed payment.
We will keep attempting the payment method until the company directs us to stop.
Who is the team behind Loop?
Eleni Steinman and Shane van Coller are the founders of Loop Crypto. Veterans of the crypto space who have been building together since 2018, Eleni and Shane started Loop to solve their own challenges of accepting crypto payments while at a prior startup.
What networks do you support?
We provide support across all EVM (Ethereum Virtual Machine) chains and Solana. Since there are over 300 networks, we have a default list of the most popular networks that we present to merchants. However, a merchant can add any EVM network or Solana upon request.
Our default list of networks is: Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. For testing purposes, we also support Sepolia (Ethereum testnet) and Solana Devnet.
What tokens do you support?
For EVM networks, we support all ERC-20 tokens and native tokens for one-time payments and invoicing. For Solana, we support all SPL tokens.
Please note, while Loop works with any token, if you would like to price in fiat and accept in a token, we will need a price feed. We currently use CoinMarketCap as our price feed.
Does Loop support payments in ETH?
Yes! Loop supports the native Ethereum token, ETH, for one-time payments and invoicing. For subscriptions, Loop supports the wrapped version of ETH known as WETH.
Does Loop support Bitcoin?
No. Bitcoin is only available on the Bitcoin network. However, Loop does support wrapped versions of Bitcoin that exist on EVM networks and on the Solana network.
Does Loop work with payments on Solana?
Yes! Loop supports the Solana network, both mainnet and its test network.
Do you off-ramp?
Yes! Loop allows merchants to settle in either fiat or crypto. Please reach out to hello@loopcrypto.xyz to learn more about the countries and fiat currencies we support for offramping.
Do you work with subscriptions?
Yes! Loop works with recurring subscription payments. We work similar to credit cards - a customer authorizes their wallet to be charged, and each billing period the wallet is charged without the end customer having to take action.
Do you work with one-time purchases?
Yes! Loop works with one-time purchases. Customers can authorize payment for only one purchase.
Do you work with invoicing?
Yes! Loop works with invoicing purchases. Customers can pay an invoice with Loop.
Do you work with top-ups?
Yes! Loop allows customers to pre-pay for credits.
Do you have payment notifications?
Yes! We send receipts and payment reminders to the end customer both before a payment is due and after a payment has been confirmed.
What wallets do you support?
Loop supports over 500 wallets, including MetaMask, Coinbase Wallet, and Rainbow wallet. Loop works with all non-custodial wallets, including MPC wallets and smart wallets. Loop does not support payments from an exchange account today but will in the future. If this is functionality you need, please reach out to hello@loopcrypto.xyz.
What integrations does Loop offer?
Yes! Loop offers a range of integrations with existing payment processors and subscription management tooling including Stripe, Chargebee, and OpenPay.
Does Loop enable fiat payments?
While Loop does not directly handle fiat payments, you can accept fiat payments through one of our integrated solutions. For example, merchants looking to accept subscription payments in both fiat and crypto can utilize Loop’s native integration with OpenPay.
What is an ERC-20 token?
ERC-20 token is a token standard with predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
The ERC-20 token standard is the most widely used standard for fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. This makes ERC20 tokens useful for things like a medium of exchange currency.
Most, if not all tokens on EVM compatible networks are ERC-20 tokens. Example tokens are USDC, USDT and Dai.
A network's native token (e.g. ETH, SOL, MATIC) is not ERC-20 and USDT on Ethereum is not fully ERC-20 compliant. Wrapped versions of native tokens exist which are ERC-20 (e.g. wETH, wSol, wMatic).
What is an SPL token?
An SPL token is Solana’s version of the ERC-20 standard. It refers to predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
What is a wrapped token?
Wrapped tokens are tokens backed one-to-one by an underlying asset, typically native to another blockchain or asset. By creating a wrapped version of a token, the user is able to track the value of the underlying token while enabling additional functionality like being used on another network.
A common example is "wrapped Bitcoin" (wBTC), which allows Bitcoin to be used on the Ethereum blockchain and wETH which allows ETH to follow the ERC-20 standard. The process of creating a wrapped token involves securing the original asset in a digital vault and minting a new token. This new token mirrors the value of the original asset and can be used on the blockchain it was minted on.
How do you get wrapped tokens?
Loop allows natively on our payment links for customers to wrap their ETH before payment. Customers can also wrap tokens using any on-chain exchange like Uniswap.
Why do you need wrapped tokens?
Native network tokens (e.g. ETH, MATIC) do not adhere to the ERC-20 standard and do not provide the functionality necessary for recurring payments, their wrapped version allows customers to use this token for payment.
Ready to get started?
Fill out our form, pay, and we will get you set up in 1 business day or schedule a call and we can walk you through a demo and chat implementation.
Get started
Ready to get started?
Fill out our form, pay, and we will get you set up in 1 business day or schedule a call and we can walk you through a demo and chat implementation.
Get started
Loop Crypto is a crypto payment processor — our full suite APIs provide merchants and payment providers all the tools they need to grow their revenue.
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Sign up for our newsletter to stay in the Loop on all the latest updates, features, and announcements from Loop Crypto.
© Loop Crypto 2025. All rights reserved.
Loop Crypto is a crypto payment processor — our full suite APIs provide merchants and payment providers all the tools they need to grow their revenue.
STAY IN THE LOOP
Sign up for our newsletter to stay in the Loop on all the latest updates, features, and announcements from Loop Crypto.
© Loop Crypto 2025. All rights reserved.
FAQs
FAQs
Have questions?
We have answers. If you don't see your question, reach out to hello@loopcrypto.xyz
Loop Basics
Networks and Tokens
Functionality
Crypto Basics
What is Loop?
Loop is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms unlock crypto and stablecoin payments. We provide all of the tools you need to accept crypto, from charging a wallet to storing payment methods to settling in fiat.
What is a crypto payment processor?
A crypto payment processor facilitates digital transactions between merchants and their customers enabling merchants to accept various forms of crypto payment. With Loop, we make it easy to accept stablecoins, ERC-20 tokens (tokens deployed within the Ethereum ecosystem and popular layer 2 networks), or SPL tokens (tokens deployed within the Solana ecosystem).
Merchants that accept crypto payments need to work through various complexities related to accepting payment on multiple networks, in multiple tokens, and from various types of wallets. Loop handles this complexity and provides APIs and tooling that are easy to use. This allows for the secure and quick transfer of funds from the customer’s wallet to the merchant’s wallet
What does a crypto payment processor do?
Loop plays an important role in enabling businesses to accept and process various forms of crypto payment from customers. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for multiple currencies and payment methods.
How does Loop work as a payment processor?
Loop works similarly to traditional payment processors making it easy for merchants to accept crypto payments from customers. To understand how Loop works, here is what a typical payment flow looks like:
Customer initiates payment
When a customer makes a purchase, they sign a transaction from their wallet providing the business with authorization and approval to charge them for a specific token on a specific network. This authorization can occur using a Loop payment link, our pay component, or by sending a transaction directly onchain.
Transaction data
Loop receives transaction data about the payment such as amount and due date is sent to Loop.
Authorization check
Loop reviews the transaction details and checks if the customer has sufficient funds and approval available. It also confirms the authenticity of the transaction data, checking its signature against that of the merchant requesting payment.
Transaction execution
If the transaction is authorized and the payment is due, Loop sends an onchain transaction, facilitating the payment from the customer’s wallet to the merchant’s wallet based on the details of the transaction data.
Transaction completion
Once the transaction is processed on-chain, Loop notifies the merchant of the payment and the merchant delivers the goods or services to the customer.
Settlement
If the merchant has elected to settle in crypto, the transaction is complete. If the merchant has elected to settle in fiat, the transferring funds from the wallet to the merchant account may take a few days depending on the fiat currency and countries involved.
How do you manage the volatility of accepting payment in crypto?
By default, Loop denominates or anchors all pricing to the US dollar at the time of purchase. For example, if you are buying a product that is $100 and paying in ETH, Loop will ping a pricing oracle at the time of purchase and charge you the equivalent amount of ETH at that moment in time. If you are using Loop to pay for a recurring monthly subscription, Loop checks the pricing oracle each month at the time of the next payment and pulls the amount of ETH equivalent to $100.
Of course, to eliminate any exposure to potentially volatile crypto assets, merchants can always simply accept stablecoins like USDC and USDT. Loop enables merchants to configure the tokens they accept, so merchants are able to opt to only accept stablecoins, or one particular stablecoin, if desired.
What if I want to denominate my product’s price in a token value?
If you want to denominate your product’s price in a token like ETH or ARB, for example, Loop supports that functionality as well. In this scenario, your product’s price could be set to 1 ETH. For a recurring monthly subscription, Loop will process a payment for 1 ETH each month regardless of any price moments in ETH.
Do customers need to lock up funds?
No, Loop never custodies any funds. As a payment processor, Loop provides authorization and facilitates the movement of funds from the customer’s wallet to the merchant’s wallet, never custodying the funds.
What if the customer doesn’t have enough funds to pay?
Loop does all the hard work of ensuring a payment occurs so you don't have to. Before a payment is due, we notify the customer if their balance is too low.
If the issue isn't resolved by the due date, we send a webhook to the company notifying them of the missed payment.
We will keep attempting the payment method until the company directs us to stop.
Who is the team behind Loop?
Eleni Steinman and Shane van Coller are the founders of Loop Crypto. Veterans of the crypto space who have been building together since 2018, Eleni and Shane started Loop to solve their own challenges of accepting crypto payments while at a prior startup.
What networks do you support?
We provide support across all EVM (Ethereum Virtual Machine) chains and Solana. Since there are over 300 networks, we have a default list of the most popular networks that we present to merchants. However, a merchant can add any EVM network or Solana upon request.
Our default list of networks is: Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. For testing purposes, we also support Sepolia (Ethereum testnet) and Solana Devnet.
What tokens do you support?
For EVM networks, we support all ERC-20 tokens and native tokens for one-time payments and invoicing. For Solana, we support all SPL tokens.
Please note, while Loop works with any token, if you would like to price in fiat and accept in a token, we will need a price feed. We currently use CoinMarketCap as our price feed.
Does Loop support payments in ETH?
Yes! Loop supports the native Ethereum token, ETH, for one-time payments and invoicing. For subscriptions, Loop supports the wrapped version of ETH known as WETH.
Does Loop support Bitcoin?
No. Bitcoin is only available on the Bitcoin network. However, Loop does support wrapped versions of Bitcoin that exist on EVM networks and on the Solana network.
Does Loop work with payments on Solana?
Yes! Loop supports the Solana network, both mainnet and its test network.
Do you off-ramp?
Yes! Loop allows merchants to settle in either fiat or crypto. Please reach out to hello@loopcrypto.xyz to learn more about the countries and fiat currencies we support for offramping.
Do you work with subscriptions?
Yes! Loop works with recurring subscription payments. We work similar to credit cards - a customer authorizes their wallet to be charged, and each billing period the wallet is charged without the end customer having to take action.
Do you work with one-time purchases?
Yes! Loop works with one-time purchases. Customers can authorize payment for only one purchase.
Do you work with invoicing?
Yes! Loop works with invoicing purchases. Customers can pay an invoice with Loop.
Do you work with top-ups?
Yes! Loop allows customers to pre-pay for credits.
Do you have payment notifications?
Yes! We send receipts and payment reminders to the end customer both before a payment is due and after a payment has been confirmed.
What wallets do you support?
Loop supports over 500 wallets, including MetaMask, Coinbase Wallet, and Rainbow wallet. Loop works with all non-custodial wallets, including MPC wallets and smart wallets. Loop does not support payments from an exchange account today but will in the future. If this is functionality you need, please reach out to hello@loopcrypto.xyz.
What integrations does Loop offer?
Yes! Loop offers a range of integrations with existing payment processors and subscription management tooling including Stripe, Chargebee, and OpenPay.
Does Loop enable fiat payments?
While Loop does not directly handle fiat payments, you can accept fiat payments through one of our integrated solutions. For example, merchants looking to accept subscription payments in both fiat and crypto can utilize Loop’s native integration with OpenPay.
What is an ERC-20 token?
ERC-20 token is a token standard with predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
The ERC-20 token standard is the most widely used standard for fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. This makes ERC20 tokens useful for things like a medium of exchange currency.
Most, if not all tokens on EVM compatible networks are ERC-20 tokens. Example tokens are USDC, USDT and Dai.
A network's native token (e.g. ETH, SOL, MATIC) is not ERC-20 and USDT on Ethereum is not fully ERC-20 compliant. Wrapped versions of native tokens exist which are ERC-20 (e.g. wETH, wSol, wMatic).
What is an SPL token?
An SPL token is Solana’s version of the ERC-20 standard. It refers to predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
What is a wrapped token?
Wrapped tokens are tokens backed one-to-one by an underlying asset, typically native to another blockchain or asset. By creating a wrapped version of a token, the user is able to track the value of the underlying token while enabling additional functionality like being used on another network.
A common example is "wrapped Bitcoin" (wBTC), which allows Bitcoin to be used on the Ethereum blockchain and wETH which allows ETH to follow the ERC-20 standard. The process of creating a wrapped token involves securing the original asset in a digital vault and minting a new token. This new token mirrors the value of the original asset and can be used on the blockchain it was minted on.
How do you get wrapped tokens?
Loop allows natively on our payment links for customers to wrap their ETH before payment. Customers can also wrap tokens using any on-chain exchange like Uniswap.
Why do you need wrapped tokens?
Native network tokens (e.g. ETH, MATIC) do not adhere to the ERC-20 standard and do not provide the functionality necessary for recurring payments, their wrapped version allows customers to use this token for payment.
Loop Basics
Networks and Tokens
Functionality
Crypto Basics
What is Loop?
Loop is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms unlock crypto and stablecoin payments. We provide all of the tools you need to accept crypto, from charging a wallet to storing payment methods to settling in fiat.
What is a crypto payment processor?
A crypto payment processor facilitates digital transactions between merchants and their customers enabling merchants to accept various forms of crypto payment. With Loop, we make it easy to accept stablecoins, ERC-20 tokens (tokens deployed within the Ethereum ecosystem and popular layer 2 networks), or SPL tokens (tokens deployed within the Solana ecosystem).
Merchants that accept crypto payments need to work through various complexities related to accepting payment on multiple networks, in multiple tokens, and from various types of wallets. Loop handles this complexity and provides APIs and tooling that are easy to use. This allows for the secure and quick transfer of funds from the customer’s wallet to the merchant’s wallet
What does a crypto payment processor do?
Loop plays an important role in enabling businesses to accept and process various forms of crypto payment from customers. Some of the services Loop provides include transaction facilitation, authorization and authentication, encryption and security, settlement and funding, data reporting and analytics, and support for multiple currencies and payment methods.
How does Loop work as a payment processor?
Loop works similarly to traditional payment processors making it easy for merchants to accept crypto payments from customers. To understand how Loop works, here is what a typical payment flow looks like:
Customer initiates payment
When a customer makes a purchase, they sign a transaction from their wallet providing the business with authorization and approval to charge them for a specific token on a specific network. This authorization can occur using a Loop payment link, our pay component, or by sending a transaction directly onchain.
Transaction data
Loop receives transaction data about the payment such as amount and due date is sent to Loop.
Authorization check
Loop reviews the transaction details and checks if the customer has sufficient funds and approval available. It also confirms the authenticity of the transaction data, checking its signature against that of the merchant requesting payment.
Transaction execution
If the transaction is authorized and the payment is due, Loop sends an onchain transaction, facilitating the payment from the customer’s wallet to the merchant’s wallet based on the details of the transaction data.
Transaction completion
Once the transaction is processed on-chain, Loop notifies the merchant of the payment and the merchant delivers the goods or services to the customer.
Settlement
If the merchant has elected to settle in crypto, the transaction is complete. If the merchant has elected to settle in fiat, the transferring funds from the wallet to the merchant account may take a few days depending on the fiat currency and countries involved.
How do you manage the volatility of accepting payment in crypto?
By default, Loop denominates or anchors all pricing to the US dollar at the time of purchase. For example, if you are buying a product that is $100 and paying in ETH, Loop will ping a pricing oracle at the time of purchase and charge you the equivalent amount of ETH at that moment in time. If you are using Loop to pay for a recurring monthly subscription, Loop checks the pricing oracle each month at the time of the next payment and pulls the amount of ETH equivalent to $100.
Of course, to eliminate any exposure to potentially volatile crypto assets, merchants can always simply accept stablecoins like USDC and USDT. Loop enables merchants to configure the tokens they accept, so merchants are able to opt to only accept stablecoins, or one particular stablecoin, if desired.
What if I want to denominate my product’s price in a token value?
If you want to denominate your product’s price in a token like ETH or ARB, for example, Loop supports that functionality as well. In this scenario, your product’s price could be set to 1 ETH. For a recurring monthly subscription, Loop will process a payment for 1 ETH each month regardless of any price moments in ETH.
Do customers need to lock up funds?
No, Loop never custodies any funds. As a payment processor, Loop provides authorization and facilitates the movement of funds from the customer’s wallet to the merchant’s wallet, never custodying the funds.
What if the customer doesn’t have enough funds to pay?
Loop does all the hard work of ensuring a payment occurs so you don't have to. Before a payment is due, we notify the customer if their balance is too low.
If the issue isn't resolved by the due date, we send a webhook to the company notifying them of the missed payment.
We will keep attempting the payment method until the company directs us to stop.
Who is the team behind Loop?
Eleni Steinman and Shane van Coller are the founders of Loop Crypto. Veterans of the crypto space who have been building together since 2018, Eleni and Shane started Loop to solve their own challenges of accepting crypto payments while at a prior startup.
What networks do you support?
We provide support across all EVM (Ethereum Virtual Machine) chains and Solana. Since there are over 300 networks, we have a default list of the most popular networks that we present to merchants. However, a merchant can add any EVM network or Solana upon request.
Our default list of networks is: Solana, Optimism, Base, Polygon, Arbitrum, Ethereum, and BNB Smart Chain. For testing purposes, we also support Sepolia (Ethereum testnet) and Solana Devnet.
What tokens do you support?
For EVM networks, we support all ERC-20 tokens and native tokens for one-time payments and invoicing. For Solana, we support all SPL tokens.
Please note, while Loop works with any token, if you would like to price in fiat and accept in a token, we will need a price feed. We currently use CoinMarketCap as our price feed.
Does Loop support payments in ETH?
Yes! Loop supports the native Ethereum token, ETH, for one-time payments and invoicing. For subscriptions, Loop supports the wrapped version of ETH known as WETH.
Does Loop support Bitcoin?
No. Bitcoin is only available on the Bitcoin network. However, Loop does support wrapped versions of Bitcoin that exist on EVM networks and on the Solana network.
Does Loop work with payments on Solana?
Yes! Loop supports the Solana network, both mainnet and its test network.
Do you off-ramp?
Yes! Loop allows merchants to settle in either fiat or crypto. Please reach out to hello@loopcrypto.xyz to learn more about the countries and fiat currencies we support for offramping.
Do you work with subscriptions?
Yes! Loop works with recurring subscription payments. We work similar to credit cards - a customer authorizes their wallet to be charged, and each billing period the wallet is charged without the end customer having to take action.
Do you work with one-time purchases?
Yes! Loop works with one-time purchases. Customers can authorize payment for only one purchase.
Do you work with invoicing?
Yes! Loop works with invoicing purchases. Customers can pay an invoice with Loop.
Do you work with top-ups?
Yes! Loop allows customers to pre-pay for credits.
Do you have payment notifications?
Yes! We send receipts and payment reminders to the end customer both before a payment is due and after a payment has been confirmed.
What wallets do you support?
Loop supports over 500 wallets, including MetaMask, Coinbase Wallet, and Rainbow wallet. Loop works with all non-custodial wallets, including MPC wallets and smart wallets. Loop does not support payments from an exchange account today but will in the future. If this is functionality you need, please reach out to hello@loopcrypto.xyz.
What integrations does Loop offer?
Yes! Loop offers a range of integrations with existing payment processors and subscription management tooling including Stripe, Chargebee, and OpenPay.
Does Loop enable fiat payments?
While Loop does not directly handle fiat payments, you can accept fiat payments through one of our integrated solutions. For example, merchants looking to accept subscription payments in both fiat and crypto can utilize Loop’s native integration with OpenPay.
What is an ERC-20 token?
ERC-20 token is a token standard with predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
The ERC-20 token standard is the most widely used standard for fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. This makes ERC20 tokens useful for things like a medium of exchange currency.
Most, if not all tokens on EVM compatible networks are ERC-20 tokens. Example tokens are USDC, USDT and Dai.
A network's native token (e.g. ETH, SOL, MATIC) is not ERC-20 and USDT on Ethereum is not fully ERC-20 compliant. Wrapped versions of native tokens exist which are ERC-20 (e.g. wETH, wSol, wMatic).
What is an SPL token?
An SPL token is Solana’s version of the ERC-20 standard. It refers to predefined rules and technical specifications that developers must follow. Having a standard allows for developers to have easier integration with wallets, exchanges, and other applications on a blockchain.
What is a wrapped token?
Wrapped tokens are tokens backed one-to-one by an underlying asset, typically native to another blockchain or asset. By creating a wrapped version of a token, the user is able to track the value of the underlying token while enabling additional functionality like being used on another network.
A common example is "wrapped Bitcoin" (wBTC), which allows Bitcoin to be used on the Ethereum blockchain and wETH which allows ETH to follow the ERC-20 standard. The process of creating a wrapped token involves securing the original asset in a digital vault and minting a new token. This new token mirrors the value of the original asset and can be used on the blockchain it was minted on.
How do you get wrapped tokens?
Loop allows natively on our payment links for customers to wrap their ETH before payment. Customers can also wrap tokens using any on-chain exchange like Uniswap.
Why do you need wrapped tokens?
Native network tokens (e.g. ETH, MATIC) do not adhere to the ERC-20 standard and do not provide the functionality necessary for recurring payments, their wrapped version allows customers to use this token for payment.
Ready to get started?
Fill out our form, pay, and we will get you set up in 1 business day or schedule a call and we can walk you through a demo and chat implementation.
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Ready to get started?
Fill out our form, pay, and we will get you set up in 1 business day or schedule a call and we can walk you through a demo and chat implementation.
Get started
Loop Crypto is a crypto payment processor — our full suite APIs provide merchants and payment providers all the tools they need to grow their revenue.
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© Loop Crypto 2025. All rights reserved.
Loop Crypto is a crypto payment processor — our full suite APIs provide merchants and payment providers all the tools they need to grow their revenue.
STAY IN THE LOOP
Sign up for our newsletter to stay in the Loop on all the latest updates, features, and announcements from Loop Crypto.
© Loop Crypto 2025. All rights reserved.