Circle Paymaster

Circle Paymaster

Enable gas fees in USDC

Allow users to pay gas in USDC instead of native tokens for a frictionless experience.

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Paymaster product screen illustrationPaymaster product screen

Avalado por la comunidad

Circle paymaster

Make USDC your universal gas token

Al instante
Frictionless

Eliminate the hassle of sourcing, holding, and managing native tokens for transactions.

Open lock icon
Permissionless

Onchain utility that any developer can integrate into their apps without a Circle account.

Estable

Avoid price volatility by holding USDC, simplifying accounting and reporting needs.

Anywhere
coming soon

Hold USDC on one blockchain and pay gas fees across multiple.

Paymaster product screen illustration

Simplify onchain interactions

Construya sobre blockchain sin las complejidades propias de esta e integre billeteras adaptadas a su aplicación.

Stablecoin Payments

Deliver seamless payments with USDC that feel just as easy as using a traditional credit or debit card.

Gas Tank
coming soon

Integrate CCTP and Paymaster to pay gas cross-chain, allowing USDC held on one chain to cover gas fees on any chain.

Revolutionize Blockchain Interactions

Construya sobre blockchain sin las complejidades propias de esta e integre billeteras adaptadas a su aplicación.

Stablecoin Payments

Deliver seamless payments with USDC that feel just as easy as using a traditional credit or debit card.

Gas Tank
(coming soon)

Integrate CCTP and Paymaster to pay gas cross-chain, allowing USDC held on one chain to cover gas fees on any chain.

Como funciona

Optimizing user experience

Sign a permit

A user initiates a transaction in your app and specifies the recipient details. Your app asks their wallet to sign an EIP-2612 permit to grant Circle Paymaster access to a small amount of their USDC to pay for gas.

Programable

Create a UserOp

Your app creates a UserOp that encodes the user’s desired transaction and specifies that Circle Paymaster should use the user’s USDC to pay for gas. The permit from the user is passed to the smart contract to facilitate this action.

Submit the UserOp

Your app submits the UserOp to a bundler for execution. The bundler verifies and approves the transaction, ensuring the gas fee is paid by Circle Paymaster and the recipient receives their payment. The bundler returns the UserOp hash, which can be used to check its status later on.

1const { signature: permitSignature } = await account.signTypedData(
2  await constructEIP2612Permit({
3    token: usdc,
4    chain: currentChain,
5    ownerAddress: account.address,
6    spenderAddress: circleTokenPaymaster,
7    value: 1000000 // Allow $1 USDC maximum to be spent on gas
8  })
9);
1// Encode a call to pay a merchant $5 USDC
2const calls = [
3  {
4    to: usdc.address,
5    abi: usdc.abi,
6    functionName: 'transfer',
7    args: [merchantAddress, 5000000n]
8  }
9];
10
11// Add the paymaster details
12const paymaster = circleTokenPaymaster;
13const paymasterData = encodePacked(
14  ['uint8', 'address', 'uint256', 'bytes'],
15  [
16    0n,             // Reserved for future use
17    usdc.address,   // Token address
18    1000000n,       // Allow $1 USDC maximum to be spent on gas
19    permitSignature // EIP-2612 permit signature from earlier
20  ]
21);
22
23// Use the bundler to estimate the necessary gas fees and limits
24const { standard: fees } = await bundlerClient.request({
25  method: 'pimlico_getUserOperationGasPrice'
26});
27const maxFeePerGas = hexToBigInt(fees.maxFeePerGas);
28const maxPriorityFeePerGas = hexToBigInt(fees.maxPriorityFeePerGas);
29const {
30  callGasLimit,
31  preVerificationGas,
32  verificationGasLimit,
33  paymasterPostOpGasLimit,
34  paymasterVerificationGasLimit
35} = await bundlerClient.estimateUserOperationGas({
36  account,
37  calls,
38  paymaster,
39  paymasterData
40});
41
42// Construct the entire user op
43const userOp = {
44  account,
45  calls,
46  callGasLimit,
47  preVerificationGas,
48  verificationGasLimit,
49  paymaster,
50  paymasterData,
51  paymasterVerificationGasLimit,
52  paymasterPostOpGasLimit,
53  maxFeePerGas,
54  maxPriorityFeePerGas
55};
56
1const userOpHash = await bundlerClient.sendUserOperation(userOp);
2const userOpReceipt = await bundlerClient.waitForUserOperationReceipt({
3  hash: userOpHash
4});
5

Como funciona

Optimizing user experience

1const { signature: permitSignature } = await
2account.signTypedData(
3  await constructEIP2612Permit({
4    token: usdc,
5    chain: currentChain,
6    ownerAddress: account.address,
7    spenderAddress: circleTokenPaymaster,
8    value: 1000000 // Allow $1 USDC maximum to be 
9spent on gas
10  })
11);
12

Verificación en tiempo real

Realice verificaciones inmediatas de cumplimiento en relación con las regulaciones jurisdiccionales seleccionadas y las políticas internas.

Validación automatizada de datos

Evalúe y valide los requisitos de datos de manera programática con facilidad.

Soporte robusto de billeteras

Distinga entre las billeteras alojadas en VASP y las autoalojadas y tome las medidas adecuadas según los requisitos reglamentarios.

Transferencia segura de PII

Proteja la Información de Identificación Personal (PII) durante la transmisión entre VASP con almacenamiento y transmisión encriptados.

Verifique billeteras autoalojadas

Reduzca el riesgo verificando las billeteras autoalojadas mediante mecanismos de pruebas de propiedad.

Monitoreo integral

Evalúe periódicamente sus transacciones en relación con tipologías específicas que apunten a patrones de comportamiento de alto riesgo, como la estructuración, el smurfing o la velocidad.

Marco personalizable

Adapte las reglas, umbrales y cadencias para que se ajusten al deseo de riesgo y a los requisitos de cumplimiento de su empresa.

Puntos de datos integrales

Aproveche sus datos históricos de transacciones o benefíciese de las tipologías elaboradas por expertos de Circle para identificar patrones sofisticados.

Gestión integrada de casos

Agilice las investigaciones con herramientas para priorizar, rastrear y resolver las alertas generadas.

Precios

Zero cost for developers

10% of gas fees per transaction for end users. Waived until June 30, 2025.

Empezar

Empezar

Live on 5 blockchains

Available on Arbitrum, Base, Ethereum, OP Mainnet, and Polygon PoS.
Support for Avalanche, Unichain, and more is coming soon.

Ver la documentación

Read our blog

Explore casos de uso, actualizaciones recientes e historias de éxito.

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Comunidad

Connect with like-minded builders to learn and collaborate.

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Preguntas frecuentes

Circle Paymaster is a product for developers to enable their users to pay gas fees in USDC. It provides a simple and secure way to cover blockchain transaction costs without needing to hold or manage native tokens like ETH.

Circle Paymaster is permissionless and available to all developers.

Yes, Circle Paymaster supports both smart contract accounts (SCAs) compliant with ERC-4337 and externally owned accounts (EOAs) following EIP-7702’s implementation.

EIP-7702 lets EOAs temporarily behave like ERC-4337-compatible SCAs. This enables them to use Circle Paymaster and pay gas fees directly in USDC.

Circle Paymaster works for both EOAs and SCAs. SCA wallets need to be smart contract accounts (SCAs) compatible with ERC-4337 standards. EOA wallets need to be upgraded to SCAs. Additionally, these SCA wallets should be built on EntryPoint v0.7 or v0.8.

Paymasters currently support only EVM blockchains. We're actively exploring solutions for non-EVM blockchains.

Circle Paymaster currently requires users to hold USDC on the specific blockchain they wish to make transactions. We’re exploring solutions for users to pay gas fees across chains.

EIP-2612 enables gasless, offchain approvals for ERC-20 tokens, allowing users to sign messages that authorize spending without separate transactions.

Circle Paymaster currently supports USDC only. We plan to support additional Circle stablecoins like EURC in the future.

The service is currently free of charge. At 9AM PT on July 1, 2025, Circle Paymaster will begin charging end users 10% of the gas cost per transaction. For example, a $0.01 gas fee becomes $0.011 with Circle Paymaster and is facilitated automatically. There is zero cost charged to developers.

Circle Paymaster is a permissionless product that doesn’t require a Circle account. It allows users to pay gas fees in USDC. Gas Station is a feature of Circle Wallets which allows developers to sponsor gas fees for their users.

Security is always our top priority. All Circle-developed smart contracts, including Circle Paymaster, undergo third-party security audits.

No. Circle Paymaster doesn’t have access to any PII.