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onchain Transaction Status Lookup
x402
onchain Transaction Status Lookup is a paid API for AI agents from onchain.x402utils.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Fetches on-chain transaction details (status, gas used, confirmations, value, block) for a given tx hash on Base or Ethereum.
Price / call$0.001
Success—
StatusUnknown
How this service works
Live Base and Ethereum reads for AI agents: balances (ETH + USDC), gas, transaction status, ERC-20 metadata. $0.001 per call via x402 (USDC on Base).
Output
A JSON object with the transaction's status (success/failed/pending), sender and recipient addresses, block number, ETH value transferred, gas used, and number of confirmations.
Example use cases
Verify cross-chain payment settlement
“I just sent USDC on Base with tx hash 0xabc123...def456 — can you confirm it went through and tell me how many confirmations it has?”
Debug a failed smart contract call
“My Ethereum transaction 0xdeadbeef...cafe1234 might have failed — can you pull up the status, gas used, and block it landed in?”
Confirm NFT transfer on Base
“Check if the Base transaction 0x111aaa...999zzz succeeded and show me the sender, receiver, and ETH value transferred.”
Technical details
Endpoint
GEThttps://onchain.x402utils.workers.dev/v1/tx?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call lookup of a specific transaction by hash on Base or Ethereum without standing up your own RPC node. Ideal for agents that need to verify payment settlement, debug failures, or check confirmation depth as a one-off read.
Side effects
- Invalid or malformed tx hash returns an error
- Transaction not found on the specified chain returns 404 or empty result
- Network congestion may delay RPC response
- Specifying the wrong chain for a hash returns not-found
- Very recent transactions may show 0 confirmations or pending status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0x…",
"from": "0x…",
"block": 39000000,
"status": "success",
"gas_used": 21000,
"value_eth": "0.0",
"confirmations": 12
}
}Tags
x402
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