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Complete an x402 payment

This tutorial walks you through a full x402 payment from HTTP 402 to receipt verification.

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Prerequisites

  • Access to a paywalled endpoint that returns HTTP 402
  • A signer capable of Ed25519 signatures
  • Sequencer endpoint URL

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Step 1: Request a protected resource

Call the resource endpoint and capture the X-Payment-Required header.

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Step 2: Build and sign an intent

Create an X402PaymentIntent with payer/payee, amount, network, and validity window. Sign with the X402_PAYMENT_V1 domain separator.

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Step 3: Retry with X-Payment

Retry the request with the signed intent in the X-Payment header.

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Step 4: Sequence the intent

Submit the intent to the sequencer for batching and settlement.

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Step 5: Fetch receipt and verify

Request the receipt and verify inclusion proof against the on-chain batch commitment.

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Next steps