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Transaction Lookup
x402
Transaction Lookup is a paid API for AI agents from x402-echo-service.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Look up a Base blockchain transaction by hash, returning its status, block number, addresses, value, gas used, and effective gas price.
Price / call$0.001
Success—
StatusUnknown
How this service works
Look up a transaction on Base by hash. POST {"hash":"0x..."} and receive its status, block number, from and to addresses, value, gas used and effective gas price. Returns a clear not-found rather than an empty object when the hash is unknown.
Output
Returns the transaction's confirmation status, block number, originating address (from), destination address (to), ETH value transferred, gas used, and effective gas price. Returns a clear not-found message if the hash does not exist on Base rather than an empty object.
Example use cases
Confirm payment settled on-chain
“Check if the transaction 0xabc123...def456 on Base went through — I need to know its status and whether it was included in a block.”
Debug a failed on-chain transfer
“I just sent a transfer on Base with hash 0x9f8e7d... but I'm not sure it succeeded — can you pull up the transaction details including from/to addresses and gas used?”
Audit gas costs for a specific transaction
“What was the effective gas price and total gas used for Base transaction 0x1a2b3c4d...? I'm trying to reconcile my gas spend.”
Technical details
Endpoint
POSThttps://x402-echo-service.onrender.com/chain/txWhen to prefer
Use this endpoint when you need to retrieve on-chain transaction details from the Base network by hash — particularly when you want structured fields like status, gas, and addresses in a single call. Prefer this over a generic block explorer scrape when you need a machine-readable response. Note it is Base-specific and will not find transactions on Ethereum mainnet or other chains.
Side effects
- Unknown hash returns a clear not-found response rather than empty object
- Invalid or malformed hash (not 32 bytes / not hex) may return a validation error
- Transaction exists on a different network (e.g. Ethereum mainnet) will return not-found
- Network or RPC timeout may result in a service error
- Pending/mempool transactions may not be found if not yet included in a block
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hash | string | 32-byte transaction hash. |
Tags
x402
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