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EVM Transaction Receipt Lookup
x402
EVM Transaction Receipt Lookup is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-29).
Fetches a transaction receipt for a given EVM transaction hash on any of 10 supported chains, returning success/failure status, gas cost, and emitted events.
Price / call$0.003
Success—
StatusUnknown
How this service works
Transaction receipt — did it succeed, what did it cost, what did it emit — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with a boolean success flag, the transaction hash, the USD cost of the transaction, a receipt ID prefixed with 'g402-', and an ISO 8601 timestamp of when the receipt was generated.
Example use cases
Verify DeFi swap confirmation
“I just submitted a swap on Arbitrum — the tx hash is 0xabc123...64hex. Can you check the receipt and tell me if it succeeded and what it cost?”
Debug failed contract call
“My smart contract call on Ethereum with hash 0xdeadbeef...64hex seems to have failed. Can you pull the transaction receipt so I can see whether it reverted and what gas was used?”
Confirm NFT mint on Polygon
“I minted an NFT on Polygon a few minutes ago, tx hash 0x9f8e7d...64hex. Did the transaction go through successfully?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/evm-receipt?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single-call, pay-per-query lookup of an EVM transaction receipt across any of 10 major chains without managing your own RPC infrastructure. It is especially useful when you need the USD cost denomination alongside raw receipt data, or when querying chains (e.g. Linea, Scroll, Gnosis) where free public RPCs are unreliable.
Side effects
- Invalid transaction hash format (not a 0x-prefixed 64-hex string) returns a validation error
- Unsupported chain name returns an enum validation error
- Transaction not yet mined or not found on the specified chain returns a not-found error
- Upstream RPC node timeout may cause delayed or failed responses
- Payment failure via x402 protocol results in 402 response before execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "evm-receipt",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.25,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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