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Examples and SDKs

Real-world Paymaster implementations and developer tooling.

This page highlights production-grade Paymasters and SDKs across the ecosystem. These projects illustrate real-world implementations, from verifying Paymasters to ERC-20 token gas payment infrastructure.

⚖️ Disclaimer: The following list is sorted alphabetically and does not reflect any ranking or order of importance.

🔧 Alchemy

Alchemy provides:

  • Simplified paymaster flow in their AA SDK
  • Support for pay-per-use and freemium patterns
  • Integrated bundling and sponsorship

🔧 Candide

Candide provides robust, feature-rich Paymaster infrastructure to simplify gas payments:

  • Verifying Paymaster with custom, flexible gas policies
  • Easy Setup of gas sponsorship with a no-code interface
  • ERC-20 Paymaster that enables gas payments using stablecoins and other popular tokens
  • Developer-Focused with generous free tier on Mainnets and a full UserOperation simulation tooling

Candide delivers one of the most complete Paymaster solutions for developers building on account abstraction.

🔧 Circle (USDC Paymaster)

Circle announced a Paymaster that allows users to pay gas in USDC:

  • Native stablecoin integration
  • Focused on enterprise and wallet UX
  • Currently live on mainnet

This makes stablecoin-based UX far more accessible.

🔧 Etherspot

Etherspot includes:

  • Paymaster-as-a-service with support for verifying and quota-based modes
  • SDK integrations for onboarding and token support
  • Rollup-friendly architecture

Their system integrates seamlessly with their smart wallet framework.

🔧 Pimlico

Pimlico offers a robust Paymaster infrastructure:

  • Verifying Paymaster with off-chain signed approvals
  • ERC-20 Paymaster for gas-in-token UX
  • Free and sponsored tiers
  • Full UserOperation simulation tooling

Pimlico is among the most battle-tested paymaster providers in ERC-4337 today.

🔬 Visa Paymaster Experiment

Visa conducted an experiment to sponsor gas payments using a Visa card:

  • Uses an off-chain verifier for authorization
  • Settles fees via card-based payment rails
  • Not production-ready, but a strong signal of ecosystem interest

While not dev-ready, it underscores major institutional exploration.

🔧 ZeroDev

ZeroDev includes:

  • Fully integrated Paymaster support in their AA SDK
  • Gasless onboarding templates
  • Pluggable backend logic for custom rules

Good fit for developers seeking end-to-end smart wallet + paymaster integration.

✅ Summary

From token-based gas models to off-chain verified sponsorship, Paymasters are becoming production-grade thanks to services like Pimlico, Etherspot, and Circle. Choose your tooling based on how much control, abstraction, or UX fidelity you need.