# Bitcoin Benji Whale Watcher API

> Bitcoin Benji Whale Watcher API is a paid API for AI agents from api.bitcoinbenji.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).

Returns real-time data on large Bitcoin whale transactions and addresses detected in the mempool or on-chain

## Facts

- Endpoint: GET https://api.bitcoinbenji.com/whales
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bitcoin-benji-whale-watcher-api-d19c104d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bG4I0LlnCORwPI1JxKUv-

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-benji-whale-watcher-api-d19c104d
```

Example prompt: Can you pull the latest Bitcoin whale activity right now — I want to see which large holders are moving BTC and how much?

## When to prefer this

Choose this endpoint when you need real-time, pay-per-call Bitcoin whale tracking without managing API keys or subscriptions. It is ideal for agents that need occasional on-demand mempool intelligence rather than continuous streaming, and for use cases where Lightning-native micropayments are acceptable. Prefer alternatives if you need historical whale data archives or streaming WebSocket feeds.

## Known failure modes

- 402 Payment Required — Lightning payment not provided or L402 token missing/invalid
- Rate limiting if payment is not processed correctly
- Empty or sparse results during low-activity mempool periods
- Network timeout if mempool is congested
- Stale data if upstream Bitcoin node sync is delayed

## How this service works

L402-gated APIs: real-time Bitcoin mempool intelligence and private AI inference. Pay-per-call via Lightning. Zero API keys. Zero subscriptions.

## Output

A JSON response containing real-time data on large Bitcoin whale transactions, including wallet addresses, transaction sizes, timestamps, and mempool or on-chain status of significant BTC movements.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bitcoin-benji-whale-watcher-api-d19c104d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.bitcoinbenji.com](https://www.zero.xyz/host/api.bitcoinbenji.com/llms.txt)