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Verifying Paymaster

Pimlico's Verifying Paymaster is a combination of an API and an on-chain smart contract that allows you to sponsor gas fees for your users. By calling our API, you get back a signature that will be accepted by our smart contract and will pay for the gas fees of your users.


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 1 leverages the Verifying Paymaster to sponsor the gas fees for a User Operation.


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

  • The supported chains page for the verifying paymaster explains the chains and networks that are supported and the API endpoints you can use to interact with it.