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Agent402 Transaction Receipt Lookup
x402
Agent402 Transaction Receipt Lookup is a paid API for AI agents from agent402.tools, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Fetches a decoded on-chain transaction receipt including gas, transfers, status, and token interactions for a given tx hash on EVM-compatible networks
Price / call$0.003
Success—
StatusUnknown
How this service works
Full receipt for a transaction hash in one call: status, block, from/to, value, gas used vs limit, effective gas price, total fee, tx type, calldata selector, contract created, plus every ERC-20 / ERC-721 / ERC-1155 Transfer event decoded locally from the logs (token, from, to, amount, tokenId) and the list of contracts that emitted logs. Receipt and transaction are fetched in a single batched request.
Output
Returns a JSON object with full transaction details: status (success/failed), to/from addresses, value in wei and native units, gas used, gas limit, effective gas price in gwei, fee in wei and native, block number, block hash, nonce, transaction type, input byte length, function selector, log count, contract address (if deployment), all contracts touched, and an array of token transfer events (ERC-20/ERC-721) with token contract, from, to, raw value, token ID, log index, and standard. Also includes the data source (Alchemy) and fetch timestamp.
Example use cases
Verify on-chain USDC payment
“I need to confirm that a USDC payment went through on Base — the transaction hash is 0xabc123...def456. Can you check the receipt and tell me the status, amount transferred, and recipient address?”
Audit gas costs for DeFi trade
“What were the exact gas fees in ETH paid for this Ethereum mainnet transaction: 0x9f4e2a...7c8d01? I want to know the gas used, gas price in gwei, and total fee in native ETH.”
Detect contract interactions in a tx
“For this Polygon transaction hash 0x7b3d11...4fa902, can you tell me which smart contracts were touched and what function selector was called?”
Technical details
Endpoint
POSThttps://agent402.tools/api/tx-receiptWhen to prefer
Choose this endpoint when you need a fully decoded, human-readable transaction receipt from an EVM chain including token transfer extraction, gas breakdown, and contract interaction details — especially when you don't want to run your own Alchemy node or parse raw RPC responses. It is ideal for agents verifying payments, auditing DeFi activity, or confirming on-chain state changes across Ethereum, Base, Polygon, Arbitrum, or Optimism without API key setup.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the specified network returns 404 or empty
- Unsupported network name returns a validation error
- Network mismatch (hash exists on Base but Ethereum was specified) may return not-found
- Payment failure (insufficient USDC balance) returns 402
- Rate limits or upstream Alchemy errors may return 5xx
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hash | string | 0x-prefixed 32-byte transaction hash. |
| network | string | ethereum / base / polygon / arbitrum / optimism (default ethereum). |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0xa0b8…eb48",
"from": "0xa916…6081",
"hash": "0x214b3526ee64f7eabfc94ea536b8680bd95a2da634ebf5149aea189d311be56b",
"type": "0x2",
"nonce": 873,
"value": "0",
"feeWei": "1833474998248",
"source": "alchemy",
"status": "success",
"chainId": 1,
"gasUsed": "45148",
"network": "ethereum",
"gasLimit": "54633",
"logCount": 1,
"selector": "0xa9059cbb",
"valueWei": "0",
"blockHash": "0x8e12…1243",
"feeNative": "0.000001833474998248",
"fetchedAt": "2026-08-22T12:00:00.000Z",
"timestamp": "2026-07-19T00:32:23.000Z",
"transfers": [
{
"to": "0xd8da…6045",
"from": "0xa916…6081",
"tokenId": null,
"contract": "0xa0b8…eb48",
"logIndex": 413,
"rawValue": "420000",
"standard": "erc20"
}
],
"inputBytes": 68,
"blockNumber": 25563191,
"contractAddress": null,
"contractsTouched": [
"0xa0b8…eb48"
],
"transactionIndex": 128,
"effectiveGasPriceGwei": 0.040610326
}
}Tags
x402
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