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ERC-20 Paymaster


The ERC-20 Paymaster is an on-chain ERC-4337 paymaster that is able to pay for the gas fees of your users in exchange for ERC-20 tokens.

Pimlico is proud to have written and launched the first permissionless, fully-audited ERC-20 Paymaster 🎉


Learning-oriented lessons that take you through a series of steps to complete a project. Most useful when you want to get started with Pimlico. They all involve the Alto Bundler.

  • Tutorial 3 leverages the ERC-20 Paymaster to sponsor the gas fees for a user operation with USDC.


References provide specific technical descriptions. They are most useful when you need detailed information about Pimlico's APIs.

Conceptual Guides

Conceptual guides provide high-level explanations of concepts. They are most useful when you need to understand the big picture.