unlock crypto payments
A single crypto payment API for global payment processing
Join payment providers and PSPs using Loop's crypto payment gateway API to unlock crypto payments for their merchants
Fast integration
Fast integration
Everything you need in one place
Everything you need in one place
Everything you need in one place
Looking for a cryptocurrency payment API? Get set up in weeks not months. Our crypto payments API suite has all the tools you need to get set up fast.
We handle the complexities of crypto payments so you don’t have to, from managing wallet connections to configuring payment methods for specific networks and tokens. Our web3 payments API is designed to integrate seamlessly and simplify the process of interacting on chain.
Looking for a cryptocurrency payment API? Get set up in weeks not months. Our crypto payments API suite has all the tools you need to get set up fast.
We handle the complexities of crypto payments so you don’t have to, from managing wallet connections to configuring payment methods for specific networks and tokens. Our web3 payments API is designed to integrate seamlessly and simplify the process of interacting on chain.
Looking for a cryptocurrency payment API? Get set up in weeks not months. Our crypto payments API suite has all the tools you need to get set up fast.
We handle the complexities of crypto payments so you don’t have to, from managing wallet connections to configuring payment methods for specific networks and tokens. Our web3 payments API is designed to integrate seamlessly and simplify the process of interacting on chain.
Crypto payment gateway
Our optional Pay Component allows payment providers to get up and running fast while making it easy for end customers to connect their crypto wallets and send an authorization transaction onchain.
Crypto payment gateway
Our optional Pay Component allows payment providers to get up and running fast while making it easy for end customers to connect their crypto wallets and send an authorization transaction onchain.
Crypto payment gateway
Our optional Pay Component allows payment providers to get up and running fast while making it easy for end customers to connect their crypto wallets and send an authorization transaction onchain.
Settle in fiat or crypto
Offer customers payment in crypto or stablecoin while Merchants can receive fiat.
Settle in fiat or crypto
Offer customers payment in crypto or stablecoin while Merchants can receive fiat.
Settle in fiat or crypto
Offer customers payment in crypto or stablecoin while Merchants can receive fiat.
Webhooks
Get notified when a payment is successfully sent from the customer to the merchant on chain or when a customer misses a scheduled payment.
Webhooks
Get notified when a payment is successfully sent from the customer to the merchant on chain or when a customer misses a scheduled payment.
Webhooks
Get notified when a payment is successfully sent from the customer to the merchant on chain or when a customer misses a scheduled payment.
Any payment methods
Our crypto payments API allows end customers to store payment methods so you can bill for recurring crypto payments or provide one-click checkouts.
Any payment methods
Our crypto payments API allows end customers to store payment methods so you can bill for recurring crypto payments or provide one-click checkouts.
Any payment methods
Our crypto payments API allows end customers to store payment methods so you can bill for recurring crypto payments or provide one-click checkouts.
Pre-auth
Query a payment method before it is charged, allowing you to troubleshoot payment issues before they occur.
Pre-auth
Query a payment method before it is charged, allowing you to troubleshoot payment issues before they occur.
Pre-auth
Query a payment method before it is charged, allowing you to troubleshoot payment issues before they occur.
SDK
Get up and running fast with our SDK designed to make it simple to implement our cryptocurrency payment gateway API.
SDK
Get up and running fast with our SDK designed to make it simple to implement our cryptocurrency payment gateway API.
SDK
Get up and running fast with our SDK designed to make it simple to implement our cryptocurrency payment gateway API.
Accept any token on the networks your merchants want
From crypto to stablecoins, Loop allows you to unlock any payment type with our blockchain payment API.
USDC
Stablecoin
A digital dollar issued by Circle and backed 100% by highly liquid cash and cash-equivalent assets.
USDC
Stablecoin
A digital dollar issued by Circle and backed 100% by highly liquid cash and cash-equivalent assets.
USDC
Stablecoin
A digital dollar issued by Circle and backed 100% by highly liquid cash and cash-equivalent assets.
USDG
Stablecoin
A digital dollar issued by Paxos and pegged to the US Dollar.
USDG
Stablecoin
A digital dollar issued by Paxos and pegged to the US Dollar.
USDG
Stablecoin
A digital dollar issued by Paxos and pegged to the US Dollar.
PYUSD
Stablecoin
A digital dollar that lets users buy, sell, hold, and transfer cryptocurrency in the PayPal app or on PayPal.com.
PYUSD
Stablecoin
A digital dollar that lets users buy, sell, hold, and transfer cryptocurrency in the PayPal app or on PayPal.com.
PYUSD
Stablecoin
A digital dollar that lets users buy, sell, hold, and transfer cryptocurrency in the PayPal app or on PayPal.com.
ETH
Native token of the Ethereum blockchain.
ETH
Native token of the Ethereum blockchain.
ETH
Native token of the Ethereum blockchain.
SOL
Native token of the Solana blockchain.
SOL
Native token of the Solana blockchain.
SOL
Native token of the Solana blockchain.
MATIC
Native token of the Polygon blockchain.
MATIC
Native token of the Polygon blockchain.
MATIC
Native token of the Polygon blockchain.
+100s more stablecoins and tokens
+100s more stablecoins and tokens
Cheaper, faster, and inherently global
Unlock the payment method customers and merchants want to use
155
countries with crypto holders
1 in 5
consumers pick crypto even when fiat is an option
1 in 3
consumers holding crypto have made a purchase with stablecoins
20%
of crypto payers are in the US
Payment Provider
Payment Provider
Integrate the best crypto payment API for your merchants
Give your merchants the features they need to grow their businesses with the best crypto payment gateway API.
Give your merchants the features they need to grow their businesses with the best crypto payment gateway API.
Give your merchants the features they need to grow their businesses with the best crypto payment gateway API.
Subscription, one-time & invoicing
Every component in pixkit is meticulously crafted for user interaction.
Learn more
Subscription, one-time & invoicing
Every component in pixkit is meticulously crafted for user interaction.
Learn more
Subscription, one-time & invoicing
Every component in pixkit is meticulously crafted for user interaction.
Learn more
Subscription, one-time & invoicing
A payments platform for businesses to accept, send, and manage online transactions seamlessly.
Learn more
Subscription, one-time & invoicing
A payments platform for businesses to accept, send, and manage online transactions seamlessly.
Learn more
Subscription, one-time & invoicing
A payments platform for businesses to accept, send, and manage online transactions seamlessly.
Learn more
Subscription, one-time & invoicing
A flexible subscription billing and revenue management platform for scaling SaaS and eCommerce businesses.
Learn more
Subscription, one-time & invoicing
A flexible subscription billing and revenue management platform for scaling SaaS and eCommerce businesses.
Learn more
Subscription, one-time & invoicing
A flexible subscription billing and revenue management platform for scaling SaaS and eCommerce businesses.
Learn more
Invoicing
A cloud-based accounting software that simplifies financial management for small businesses.
Learn more
Invoicing
A cloud-based accounting software that simplifies financial management for small businesses.
Learn more
Invoicing
A cloud-based accounting software that simplifies financial management for small businesses.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
Invoicing
An open-source publishing platform designed for modern creators and independent media.
Learn more
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.
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.
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
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.
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.
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.