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btc-tx
x402
btc-tx is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Fetches and decodes a Bitcoin transaction by its transaction ID, returning inputs, outputs, fee, size metrics, RBF flag, and confirmation status.
Price / call$0.01
Success—
StatusUnknown
How this service works
Decoded Bitcoin transaction by txid: inputs and outputs, fee, size, weight and virtual size, replace-by-fee flag, and confirmation status with a confirmation count. Informational, not advice.
Output
Returns a decoded Bitcoin transaction object including: list of inputs (with previous txid references and amounts), list of outputs (addresses and amounts), total fee in satoshis, raw byte size, weight units, virtual size (vBytes), replace-by-fee (RBF) boolean flag, confirmation count, and confirmation status (confirmed/unconfirmed).
Example use cases
Verify incoming Bitcoin payment
“I'm waiting for a payment — the txid is 4ebd3e4a8c7f2b1d9a0e6f3c2d5a8b7e1f4c9d2a3b6e0f5c8d1a4b7e2f9c0d3. Can you check if it's confirmed and how many confirmations it has so far?”
Audit Bitcoin transaction fee and size
“For BTC transaction b3c7d1f4a2e9b6c0d5f2a8e3b1c7d4f0a6e2b9c5d8f1a3e7b0c4d2f8a5e1b6, what was the fee paid and what are the size, weight, and virtual size metrics?”
Check replace-by-fee flag on pending tx
“I sent a Bitcoin transaction and I'm not sure if it's replaceable — txid is f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0. Can you tell me if RBF is enabled and whether it's confirmed yet?”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/btc/txWhen to prefer
Use this endpoint when you need decoded, human-readable Bitcoin transaction details — inputs, outputs, fee, size metrics, RBF flag, and confirmation count — from a single txid lookup. Prefer this over raw node queries when you need a structured JSON response without running your own Bitcoin node. It is ideal for agents verifying payments, auditing fees, or monitoring confirmation status.
Side effects
- Invalid or malformed txid (not 64 hex characters) returns a 400-level error
- Transaction not found on the network returns a 404 or empty result
- Unconfirmed mempool transactions may have 0 confirmations and incomplete fee data
- Network or node connectivity issues may cause timeouts
- Payment not included or declined returns a 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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