# Bitcoin Transaction Lookup

> Bitcoin Transaction Lookup is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).

Looks up a Bitcoin transaction by txid, returning confirmation status, block info, fee in sats and sat/vB, RBF signal, inputs/outputs with addresses and amounts, and current USD value.

## Facts

- Endpoint: POST https://agentsvc.io/api/v1/proxy/btc-tx?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bitcoin-transaction-lookup-fdaacd44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nyaqSCoXg_XqKN-tANxEW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability bitcoin-transaction-lookup-fdaacd44 -d '<json body>'
```

Example prompt: Can you check the status of this Bitcoin transaction — txid a1b2c3d4e5f6...abcd — and tell me if it's confirmed, how many confirmations it has, what the fee was, and what the current USD value is?

## When to prefer this

Use this endpoint when you need real-time Bitcoin transaction status, including mempool visibility and RBF signaling, with fee analysis in both sat and sat/vB alongside live USD conversion — ideal for confirming payments, diagnosing stuck transactions, or auditing transfer details without running your own Bitcoin node.

## Known failure modes

- Invalid or malformed txid (not 64 hex characters) — returns error
- Transaction not found in confirmed chain or mempool — returns not found
- Network timeout connecting to Bitcoin node — returns service error
- Transaction too old and pruned from accessible data — may return not found

## How this service works

Bitcoin transaction by txid: confirmed or in the mempool, confirmations, block, fee in sats and sat/vB, RBF signal, inputs and outputs with addresses and amounts, USD value. Use to confirm a payment arrived or to check why a transaction is stuck.

## Output

Returns whether the transaction is confirmed or still in the mempool, number of confirmations, the block it was included in, fee in satoshis and fee rate in sat/vB, whether RBF is signaled, a list of all inputs and outputs with addresses and amounts, and the current USD value of the transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "txid": {
   "type": "string",
   "description": "Transaction id, 64 hex"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bitcoin-transaction-lookup-fdaacd44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentsvc.io](https://www.zero.xyz/host/agentsvc.io/llms.txt)