# x402helper.xyz BTC Address Lookup

> x402helper.xyz BTC Address Lookup is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-31).

Looks up information about a Bitcoin mainnet address (legacy, P2SH, or bech32) via a pay-per-call x402 micropayment endpoint.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/btc/address?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402helper-xyz-btc-address-lookup-b50ab78c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H6APBSsuDzivqsxmA1hzA

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 x402helper-xyz-btc-address-lookup-b50ab78c
```

Example prompt: Look up the Bitcoin address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh and tell me what you find about it.

## When to prefer this

Use this endpoint when you need quick, pay-per-call Bitcoin address lookups without setting up a full blockchain node or subscribing to a data service. Best suited for lightweight, on-demand queries where cost per call ($0.013 USDC) is acceptable and x402 micropayment infrastructure is already in place.

## Known failure modes

- Missing or invalid 'address' query parameter returns an error
- Non-mainnet or malformed address strings may return an error or empty result
- Payment failure (insufficient USDC, bad x402 header) returns HTTP 402
- Rate limiting or server errors may return 5xx responses
- Address not found on mainnet returns empty or null result object

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

Returns a JSON object with success status and a result object containing on-chain data about the queried Bitcoin address, such as balance, transaction count, or address metadata.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "default": null,
       "description": "Bitcoin mainnet address (legacy 1.., p2sh 3.., or bech32 bc1..)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402helper-xyz-btc-address-lookup-b50ab78c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)