Receipt Notary

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Notarize a paid response into a compact receipt: SHA-256 of the body (or your pre-computed hash), UTC timestamp, resource and payment tx. Bodies up to 64KB are hashed server-side and cross-checked against a provided sha256; larger bodies get a 413 asking you to send only the hash.

How to use

  1. Paste the resource URL you paid for and, optionally, the payment tx hash.
  2. Paste the response body (up to 64KB) or a pre-computed sha256.
  3. Notarize — the server hashes and cross-checks.
  4. Save the receipt_id + sha256 + timestamp as your proof.
  5. Agents call the paid POST /api/receipt-notary endpoint ($0.001).

Where it applies

  • Keeping a verifiable record of a paid API response.
  • Providing a receipt for audit or reimbursement.
  • Storing the hash of a response without keeping the full body.
  • An agent logging its spend trail across the hub.