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ARAKEL x402 Transaction Proof Verifier
x402
ARAKEL x402 Transaction Proof Verifier is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).
Verifies a Base USDC payment transaction and returns a cryptographically signed (Ed25519) binding between that payment and caller-supplied request/response hashes, confirming payee, amount, and confirmations.
Price / call$0.001
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 'decision' field (e.g. 'VERIFIED'), a 'verified' boolean, granular 'checks' (payee_matches, amount_matches, transaction_found, transaction_success, confirmations_sufficient), and an Ed25519 'signature' object binding the payment to the supplied request/response hashes, all under the 'arakel.x402.transaction-proof.v1' schema.
Example use cases
Agent payment receipt binding
“I just paid for an API call with USDC on Base — the tx hash is 0xdeadbeef... and I need a signed proof that the payment of 0.001 USDC went to 0xServiceWallet... with at least 1 confirmation, binding it to my request hash 0xREQ... and response hash 0xRES...”
Escrow release verification
“Before I release the work product, confirm that 50 USDC was actually sent to my wallet 0xMyWallet... on Base in transaction 0xClientPay... with at least 6 confirmations, and sign a receipt tying it to job request hash 0xJOBREQ...”
Autonomous agent payment audit trail
“My agent just completed a task and claimed it received payment — verify that tx 0xAgentTx... on Base transferred exactly 5 USDC from 0xPayer... to 0xAgent... with at least 2 confirmations, and return a cryptographically signed proof I can store for the audit log”
Technical details
Endpoint
POSThttps://proof.arakelproof.space/v1/x402/transaction-proof?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographic, machine-verifiable proof that a specific USDC payment on Base occurred and matches expected parameters (payee, amount, confirmations) AND you want the result cryptographically signed and bound to a request/response hash pair for audit or receipt purposes. Prefer it over generic blockchain explorers when you need a structured, signed assertion an agent or smart contract can consume programmatically, and when operating within x402 payment flows.
Side effects
- Transaction hash not found on Base — transaction_found: false
- Payee address mismatch — payee_matches: false, decision not VERIFIED
- Amount mismatch — amount_matches: false
- Insufficient confirmations at time of check — confirmations_sufficient: false
- Malformed or missing required fields (tx, expected_payee) — validation error
- Network timeout reaching Base RPC — service 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": {
"checks": {
"payee_matches": true,
"amount_matches": true,
"transaction_found": true,
"transaction_success": true,
"confirmations_sufficient": true
},
"schema": "arakel.x402.transaction-proof.v1",
"decision": "VERIFIED",
"verified": true,
"signature": {
"alg": "Ed25519"
}
}
}Tags
x402
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