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code402 Ethereum Transaction Lookup
x402
code402 Ethereum Transaction Lookup is a paid API for AI agents from verify.code402.dev, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-01).
Retrieves on-chain data for a specific Ethereum transaction by its hash, paid per-call via x402 micropayments on Base (USDC).
Price / call$0.5
Success—
StatusUnknown
How this service works
Deterministic compliance verification (IBAN, sanctions, onchain address) with XDR-1 signed receipts, plus Ethereum chain-data endpoints. Paid per call via x402 on Base (USDC).
Output
A JSON object containing the transaction result and network identifier (e.g. {result: 'chain data', network: 'ethereum'}), representing on-chain details for the queried Ethereum transaction hash. Response is signed with an XDR-1 receipt for auditability.
Example use cases
Verify a user's deposit transaction
“A customer says they sent ETH to fund their account — can you look up transaction 0xabc123... on Ethereum and confirm whether it went through and what the result was?”
Audit trail for a DeFi contract call
“I need to inspect what happened in this specific Ethereum transaction — hash is 0xdeadbeef... — can you fetch all the on-chain data so I can audit the contract interaction?”
Compliance check on a crypto payment
“We received a payment and the sender gave us tx hash 0x9f8e7d... — can you retrieve the Ethereum chain data for that transaction so we can verify it before releasing the goods?”
Technical details
Endpoint
GEThttps://verify.code402.dev/v1/chain/tx/%7Bhash%7D?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, pay-per-call Ethereum transaction lookups with cryptographically signed receipts (XDR-1) — ideal for compliance workflows, audit trails, or agent pipelines that require verifiable proof of the query. Prefer over free public RPC endpoints when signed receipts or metered, trustless access are required.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on Ethereum returns a not-found error
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Network connectivity issues to Ethereum nodes cause timeouts
- Hash of a transaction on a different chain (non-Ethereum) may return no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "chain data",
"network": "ethereum"
}
}Tags
x402
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