# OnChaiNinja Whale Tracker — Multi-Chain

> OnChaiNinja Whale Tracker — Multi-Chain is a paid API for AI agents from x402ninja.vercel.app, paid per call via x402, $2/call, status unknown (last checked 2026-09-13).

Returns whale wallet movement data and large on-chain transfers for a specified blockchain (Base, Solana, Arbitrum, etc.)

## Facts

- Endpoint: GET https://x402ninja.vercel.app/api/whale/%7Bchain%7D
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/onchaininja-whale-tracker-multi-chain-69a7f823
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FmTmEFHRZwIAUfo54otJ0

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 onchaininja-whale-tracker-multi-chain-69a7f823
```

Example prompt: Show me the latest whale movements on Base — I want to see any large wallet transfers happening right now on that chain.

## When to prefer this

Use this endpoint when you need real-time whale wallet movement data for a specific blockchain (Base, Solana, Arbitrum, or others supported by OnChaiNinja), especially when tracking large on-chain transfers as alpha signals for trading or monitoring purposes.

## Known failure modes

- Unsupported chain identifier returns empty movements array or error
- Payment not completed results in 402 response blocking data access
- Chain parameter missing or malformed returns invalid request error
- No recent whale activity may return an empty movements array

## How this service works

Alpha signals, whale tracking, rug scanning, and MEV protection across Base, Solana, Arbitrum, and more.

## Output

A JSON object containing the queried chain name and a list of whale movements, including large on-chain transfers and wallet activity detected on that blockchain.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "base",
  "movements": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onchaininja-whale-tracker-multi-chain-69a7f823/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402ninja.vercel.app](https://www.zero.xyz/host/x402ninja.vercel.app/llms.txt)