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x402 Protocol

Agntor extends HTTP 402 to require a cryptographic proof (X-AGNTOR-Proof) for paid agent operations.

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Flow

  1. Buyer calls seller without proof → 402 Payment Required.
  2. Buyer acquires a ticket from Agntor.
  3. Buyer retries with X-AGNTOR-Proof.
  4. Seller validates ticket and proof and executes the task.

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Required Headers

X-AGNTOR-Proof: <jwt>

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x402‑Only Constraint

When requires_x402_payment is true, requests must include payment_protocol: "x402" and x402_proof.txHash.