# Explorer Gateway API — Bitcoin Address Lookup

> Explorer Gateway API — Bitcoin Address Lookup is a paid API for AI agents from api.blockchain.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Looks up on-chain data for a given Bitcoin (BTC) or Bitcoin Cash (BCH) address via the blockchain.com explorer gateway

## Facts

- Endpoint: POST https://api.blockchain.com/explorer-gateway-kt/x402/btc/address?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/explorer-gateway-api-bitcoin-address-lookup-e174ad21
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z4kPRE_E21ZS2y4sGRxho

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-address-lookup-e174ad21 -d '<json body>'
```

Example prompt: What's the current balance and transaction history for Bitcoin address 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf Na?

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-call access to Bitcoin or Bitcoin Cash address data without API key registration. Ideal for agents that need to verify payments, audit wallets, or enrich transaction data on demand. Prefer over free public explorers when you need reliable uptime backed by blockchain.com infrastructure and x402 micropayment billing.

## Known failure modes

- Invalid or malformed address string returns an error response
- Address not found on-chain (e.g. never used) may return empty or zero-balance result
- Network timeout or upstream blockchain.com service unavailability
- Unsupported address format (e.g. non-BTC/BCH address submitted) returns an error
- Payment failure via x402 protocol results in 402 response and no data returned

## How this service works

Blockchain explorer gateway — Solana, Bitcoin, Bitcoin Cash, Ethereum

## Output

Returns on-chain data for the queried Bitcoin or Bitcoin Cash address, including current balance, total received, total sent, and transaction history as a JSON object sourced from the blockchain.com explorer.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "description": "Bitcoin or Bitcoin Cash address"
  }
 }
}
```

## 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-address-lookup-e174ad21/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchain.com](https://www.zero.xyz/host/api.blockchain.com/llms.txt)