# Explorer Gateway API – Bitcoin Transaction Lookup

> Explorer Gateway API – Bitcoin Transaction Lookup is a paid API for AI agents from api.blockchain.info, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Looks up detailed information about a specific Bitcoin transaction by its transaction ID via the Blockchain.info explorer gateway

## Facts

- Endpoint: POST https://api.blockchain.info/explorer-gateway-kt/x402/btc/transaction?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/explorer-gateway-api-bitcoin-transaction-lookup-a89b25c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I6ZyPmGQApC-CzmY_aZLM

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 explorer-gateway-api-bitcoin-transaction-lookup-a89b25c4 -d '<json body>'
```

Example prompt: Can you look up the Bitcoin transaction with txId a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d on Blockchain.info and tell me its confirmation status, amount, and fee?

## When to prefer this

Use this endpoint when you need authoritative Bitcoin transaction data sourced directly from Blockchain.info's explorer infrastructure, particularly when you have a specific txId and need confirmation status, input/output details, or fee information. Prefer this over general-purpose RPC nodes when you want a simple REST/JSON interface without running your own Bitcoin node. The x402 micropayment model ($0.001 USDC per call) makes it cost-effective for low-to-moderate query volumes.

## Known failure modes

- Invalid or malformed txId returns an error or empty response
- Transaction not yet propagated to the network returns not-found
- Network timeout or gateway unavailability returns a 5xx error
- Unconfirmed mempool transactions may have incomplete block/confirmation data
- Payment of 0.001 USDC required per call — insufficient balance causes rejection

## How this service works

Paid AI-agent access to Blockchain.com Explorer API

## Output

A JSON object containing detailed Bitcoin transaction data including inputs (source addresses and amounts), outputs (destination addresses and amounts), total value transferred, miner fee, block height, number of confirmations, transaction timestamp, and transaction size in bytes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "txId": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/explorer-gateway-api-bitcoin-transaction-lookup-a89b25c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchain.info](https://www.zero.xyz/host/api.blockchain.info/llms.txt)