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Welcome, we are building X402 tools with and for Java!

Java client SDK

x402 Java client provides methods to retrieve payment requirements from an X402 URL, generate a signed payload, and send it to the server. It also allows you to collect the settlement information returned by the server.

Java server SDK

x402 Spring boot starter allows pay-gated APIs for humans and AI agents with in one Spring annotation. It turns any route into a pay-per-call endpoint using the x402 protocol. It deals with the payment and unlocks the resource.

Facilitator server

The Mogami Facilitator server is your back-end gateway for processing x402 payments on-chain. It verifies and settles transactions, acting as a trusted bridge between clients and smart contracts.

Examples

A project showing a x402 complete example of a server protected URL and a client paying to access it.