# Beggar Bot BTC CPFP Lookup (Base Mainnet)

> Beggar Bot BTC CPFP Lookup (Base Mainnet) is a paid API for AI agents from beggar-bot-demand.beggarbot.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-04).

Fetches Bitcoin CPFP (Child-Pays-For-Parent) transaction data or analysis via the Beggar Bot utility platform on Base mainnet, paid via x402.

## Facts

- Endpoint: GET https://beggar-bot-demand.beggarbot.workers.dev/v1/btccpfp?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/beggar-bot-btc-cpfp-lookup-base-mainnet-2d79968a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m9ZWr88Z37g1jnFkDkwD4

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 beggar-bot-btc-cpfp-lookup-base-mainnet-2d79968a
```

Example prompt: Can you look up the CPFP details for this Bitcoin transaction — I want to know if it has a child transaction bumping its fees and what the combined fee rate looks like?

## When to prefer this

Use this endpoint when you need to specifically query Bitcoin CPFP (Child-Pays-For-Parent) transaction data through a pay-per-call API that accepts USDC on Base mainnet via the x402 payment protocol. Prefer this over manual mempool explorers when building automated agents that need programmatic CPFP data with micropayment-based access and no subscription required.

## Known failure modes

- Invalid or missing transaction ID returns an error response
- Transaction not found in mempool or chain data returns empty or 404-style error
- Payment not provided or insufficient USDC via x402 returns HTTP 402 Payment Required
- Network unavailable or Cloudflare Worker timeout returns 5xx error
- Malformed query parameters return a validation error

## How this service works

Paid: /v1/verify, /v1/risk, /v1/receipt cost $0.01 USDC per call on Base mainnet via x402 (payTo 0x719227f384b66BFEF00093D6d8d32fA9dC2B40e7); utilities analyze Base mainnet (USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) by default, network=base-sepolia optional; /v1/receipt/verify and discovery files are free. Operator: Beggar Bot.

## Output

A JSON object containing Bitcoin CPFP transaction details, including parent and child transaction relationships, fee rates, and related mempool data relevant to the queried transaction.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/beggar-bot-btc-cpfp-lookup-base-mainnet-2d79968a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from beggar-bot-demand.beggarbot.workers.dev](https://www.zero.xyz/host/beggar-bot-demand.beggarbot.workers.dev/llms.txt)