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BTC Node API — Bitcoin Transaction Lookup
x402
BTC Node API — Bitcoin Transaction Lookup is a paid API for AI agents from api.relai.fi, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Retrieves detailed information about a Bitcoin transaction by its hash
Price / call$0.005
Success—
StatusUnknown
How this service works
Bitcoin transaction details
Output
Returns detailed Bitcoin transaction data including inputs, outputs, transaction fee, block height, confirmation count, timestamp, and other on-chain metadata for the specified transaction hash.
Example use cases
Verify customer Bitcoin payment received
“A customer says they sent me Bitcoin but I haven't received it yet. Can you look up transaction 3f3ba3d4c82218f84df0994c9db0c7b8c5e8c7d8e4c8c8f8e4c8c8f8e4c8c8f and tell me if it's confirmed yet, how many confirmations it has, and what the fee was?”
Audit incoming blockchain donations
“We've been receiving Bitcoin donations but need to track them for our records. Can you pull up the details for transaction 7c4e7d8e4c8c8f8e4c8c8f8e4c8c8f8e4c8c8f8e4c8c8f8e4c8c8f8e4c8c8f including all inputs, outputs, the block it's in, and the timestamp so I can log it?”
Investigate suspicious transaction chain
“I'm trying to understand a Bitcoin transaction that looks unusual — can you fetch the full details for hash a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0 and show me all the inputs and outputs so I can trace where the funds came from and went to?”
Technical details
Endpoint
GEThttps://api.relai.fi/relay/1780781322365/api/tx/{hash}When to prefer
Use this endpoint when you need to look up specific Bitcoin transaction details by TXID — such as verifying a payment, inspecting inputs/outputs, or checking confirmation status — and want a simple HTTP API without running your own Bitcoin node.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the Bitcoin network
- Network timeout if the BTC node is temporarily unavailable
- Rate limiting or payment failure if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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