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Blockchain Transaction Receipt Lookup
x402
Blockchain Transaction Receipt Lookup is a paid API for AI agents from x402-safe-upgrade-api.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-13).
Looks up the on-chain transaction receipt for a given transaction hash on Base or Base Sepolia, returning status, fee, confirmation, and explorer URL.
Price / call$0.02
Success—
StatusUnknown
How this service works
Evidence-backed npm package upgrade decisions for coding agents.
Output
Returns a JSON object with the transaction status (e.g. 'success' or 'failed'), the fee paid in wei as a string, a Basescan/explorer URL for the transaction, and a confirmation field indicating whether the transaction is confirmed on-chain.
Example use cases
Verify payment confirmation after checkout
“I just sent a USDC payment on Base with transaction hash 0xabc123...def456 — can you confirm it went through and tell me the final status?”
Debug failed transaction on testnet
“Check transaction 0x9f2e...1d3a on Base Sepolia for me and let me know if it failed and what fee was charged.”
Retrieve explorer link for record-keeping
“I need the Basescan explorer URL and fee details for transaction hash 0x5c8b...77fa on the Base mainnet — can you pull that receipt for me?”
Technical details
Endpoint
POSThttps://x402-safe-upgrade-api.onrender.com/v1/transaction-receipt?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify whether a specific Base or Base Sepolia transaction has been confirmed, retrieve its fee cost in wei, or get a direct block explorer link — especially useful in automated payment pipelines or agent workflows that need to confirm an x402 payment went through before proceeding.
Side effects
- Invalid or malformed transaction hash returns an error response
- Transaction hash not found on the specified chain returns a not-found error
- Specifying an unsupported chain value returns a validation error
- Network connectivity issues with the Base RPC may cause timeouts
- Pending transactions may return unconfirmed status rather than success
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| transactionHash | string | 0x-prefixed 32-byte public transaction hash. |
Output
Schema · Response
{
"type": "json",
"example": {
"feeWei": "21000000000000",
"status": "success",
"explorerUrl": "https://basescan.org/tx/0x...",
"confirmation": "confirmed"
}
}Tags
x402
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