# BaseBuilder Crypto Whale Tracker

> BaseBuilder Crypto Whale Tracker is a paid API for AI agents from bb-crypto.vercel.app, paid per call via x402, $0.091853/call, status unknown (last checked 2026-09-13).

Tracks large cryptocurrency wallet movements and whale transactions on-chain

## Facts

- Endpoint: POST https://bb-crypto.vercel.app/api/whale-tracker
- Price: $0.091853/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-crypto-whale-tracker-05d77c1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yQJCFbVQfnDloac0tcwvr

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 basebuilder-crypto-whale-tracker-05d77c1d -d '<json body>'
```

Example prompt: Show me the latest whale transactions for ETH on the Ethereum mainnet — I want to see any transfers above 500 ETH from the past 24 hours.

## When to prefer this

Use this endpoint when you need to track large cryptocurrency wallet movements and whale-level on-chain activity, especially for monitoring market-moving transactions on supported blockchains. Prefer this over generic blockchain explorers when you want pre-filtered, threshold-based whale detection.

## Known failure modes

- Invalid or unsupported token symbol returns an error
- Blockchain network not supported returns 400
- No whale transactions found in the given timeframe returns empty result
- Payment not processed returns 402
- Rate limiting or quota exceeded returns 429

## How this service works

BaseBuilder Crypto API hub - 26 paid endpoints

## Output

Returns a list of large on-chain transactions including wallet addresses, transaction amounts, token symbols, timestamps, and blockchain network details for whale-level activity

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-crypto-whale-tracker-05d77c1d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-crypto.vercel.app](https://www.zero.xyz/host/bb-crypto.vercel.app/llms.txt)