x402 Payment Service

The x402 payment service enables payment-aware access using HTTP 402 semantics. It is optimized for automated clients like bots and agents.

Integration characteristics

  • Declare payment requirements for protected resources.

  • Coordinate facilitator-assisted transactions when used.

  • Verify settlement and authorize access.

  • Prevent replay and double-spend style abuse at the API layer.

Responsibilities

  • Works best for pay-per-call usage models.

  • Keeps payment complexity out of the gateway and domain services.

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