ARAKEL x402 Transaction Proof

Name: ARAKEL x402 Transaction Proof
Price: 0.003 USD

x402

ARAKEL x402 Transaction Proof is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).

Verifies a Base USDC payment on-chain and returns an Ed25519-signed receipt binding that payment to specific request and response hashes, enabling machine-verifiable proof of a paid API exchange.

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

Returns a signed JSON object conforming to schema 'arakel.x402.receipt-verify.v1', containing a payment decision (VERIFIED or not), verified boolean, the original request_hash and response_hash, an Ed25519 signature with algorithm metadata, and service_id — enabling any downstream machine to independently confirm that the named USDC payment covered the exact API exchange.

Example use cases

Autonomous agent payment audit trail

“After my agent called a paid API and got a response, I need ARAKEL to verify the Base USDC transaction 0xdef456... paid 0.01 USDC to 0xServiceWallet... and return a signed receipt binding request hash 0xreqAAA... and response hash 0xressBBB... so I can prove the exchange was funded.”

Downstream system verification of paid exchange

“Before releasing the result to the next pipeline stage, verify that Base tx 0x111aaa... actually transferred at least 0.005 USDC to 0xRecipient999... with at least 5 confirmations, and give me a signed ARAKEL binding for request hash 0xrqHash... and response hash 0xrsHash... that the downstream verifier can check.”

Compliance receipt for a paid data request

“For compliance records, I need a cryptographically signed ARAKEL receipt proving that Base transaction 0xdeadbeef... paid exactly 0.003 USDC to 0xCompliancePayee... for service 'data-feed-v2', tied to request hash 0xReqXYZ... and response hash 0xRespXYZ....”

Technical details

Endpoint

POSThttps://proof.arakelproof.space/v1/x402/receipt-verify?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need cryptographic, machine-verifiable proof that a specific Base USDC payment funded a specific API request-response pair — particularly for autonomous agent pipelines, multi-party accountability, compliance auditing, or releasing resources contingent on verified payment. It is distinctively useful over generic blockchain explorers because it returns an Ed25519-signed binding anchoring the payment to exact content hashes, not just confirming the transaction.

Side effects

Transaction hash not found on Base chain — returns unverified decision
Payment amount does not meet expected_amount_usdc or expected_amount_atomic — verification fails
Expected payee does not match actual USDC recipient — binding rejected
Insufficient confirmations below min_confirmations threshold — returns unverified
Malformed or missing request_hash / response_hash — API error
Transaction already used for a different binding — possible replay detection error

Input

Schema · Request body

Field	Type	Description
tx	string	Base transaction hash
service_id	string
request_hash	string	SHA-256 style 32-byte request hash for receipt binding
response_hash	string	SHA-256 style 32-byte response hash for receipt binding
expected_payee	string	Expected USDC recipient
expected_payer	string	Optional expected USDC payer
min_confirmations	integer
expected_amount_usdc	string	Expected USDC decimal amount; provide this or expected_amount_atomic
expected_amount_atomic	string	Expected USDC amount in 6-decimal atomic units; provide this or expected_amount_usdc

Output

Schema · Response

{
  "type": "json",
  "example": {
    "schema": "arakel.x402.receipt-verify.v1",
    "payment": {
      "decision": "VERIFIED",
      "verified": true
    },
    "decision": "VERIFIED",
    "verified": true,
    "signature": {
      "alg": "Ed25519"
    },
    "request_hash": "0x…",
    "response_hash": "0x…"
  }
}

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