ARAKEL AP2 Payment Receipt Verifier

x402

ARAKEL AP2 Payment Receipt Verifier is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-09).

Cryptographically verifies an AP2 ES256 Payment Receipt JWT against a trusted issuer key and mandate chain, returning a machine-verifiable VERIFIED/REJECTED decision with Ed25519 signature.

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

$0.001 OFAC destination-wallet preflight for autonomous agents, plus machine-verifiable official-source evidence over x402 USDC on Base.

Output

A JSON object containing a schema identifier (arakel.ap2.payment-receipt-verify.v1), a decision field (e.g. VERIFIED_UNDER_SUPPLIED_ISSUER_KEY or a rejection reason), a boolean verified_under_supplied_issuer_key flag, and a signature block indicating Ed25519 attestation of the result — enabling downstream systems to trust the verification outcome cryptographically.

Example use cases

Autonomous agent pre-release payment check

“Before delivering the API response to this paying client, verify their AP2 payment receipt JWT using my trusted issuer public key and expected transaction ID so I know the USDC payment actually cleared correctly.”

Marketplace escrow receipt audit

“I need to confirm that the payment receipt JWT submitted by the buyer is valid — can you verify it against the expected open checkout hash and mandate chain and tell me if it checks out?”

Post-payment compliance attestation

“After collecting a USDC payment over x402, verify the receipt JWT using my P-256 root JWK and the expected nonce to generate a machine-verifiable attestation I can attach to this transaction record.”

Technical details

Endpoint

POSThttps://proof.arakelproof.space/v1/ap2/payment-receipt-verify?utm_source=zero.xyz

When to prefer

Choose this endpoint when your agent needs cryptographic, machine-verifiable proof that an x402/AP2 USDC payment receipt is authentic — particularly when you hold the issuer public JWK and need an attested Ed25519-signed decision you can pass downstream. Prefer this over simple on-chain balance checks when you need proof of a specific receipt's integrity, mandate chain linkage, or open checkout hash binding.

Side effects

Invalid or malformed receipt_jwt returns a rejection decision
Mismatched expected_nonce or expected_aud causes verification failure
Missing both mandate_chain and expected_reference returns an error
Untrusted or incorrect issuer_jwk results in failed verification
Expired JWT causes rejection with expiry-related decision code
Malformed JWK object causes a 400-level parse error

Input

Schema · Request body

Field	Type	Description
issuer_jwk	object	Caller-trusted receipt issuer P-256 public JWK
receipt_jwt	string	AP2 ES256 Payment Receipt JWT
expected_aud	string
mandate_chain	string	AP2 dSD-JWT mandate chain; for receipt verification provide this or expected_reference
expected_nonce	string
mandate_context	object
trusted_root_jwk	object	Caller-trusted P-256 root public JWK
expected_reference	string	For receipt verification provide this or mandate_chain
expected_transaction_id	string
expected_open_checkout_hash	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "schema": "arakel.ap2.payment-receipt-verify.v1",
    "decision": "VERIFIED_UNDER_SUPPLIED_ISSUER_KEY",
    "signature": {
      "alg": "Ed25519"
    },
    "verified_under_supplied_issuer_key": true
  }
}

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