# OnChaiNinja Whale Tracker — Multi-Chain

> OnChaiNinja Whale Tracker — Multi-Chain is a paid API for AI agents from x402ninnin.vercel.app, paid per call via x402, $2/call, status unknown (last checked 2026-09-11).

Returns whale wallet movement data and large transaction signals for a specified blockchain (Base, Solana, Arbitrum, etc.)

## Facts

- Endpoint: GET https://x402ninnin.vercel.app/api/whale/%7Bchain%7D
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/onchaininja-whale-tracker-multi-chain-f8b7db11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wVNWuNvIZu47pvKb248lu

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-f8b7db11
```

Example prompt: Show me the latest whale movements on Base — any big wallet transfers or alpha signals I should know about right now.

## When to prefer this

Use this endpoint when an agent needs to surface large wallet movement data or whale signals on a specific supported chain (Base, Solana, Arbitrum). Prefer this over generic block explorers when you want pre-filtered alpha-signal-style data rather than raw transaction history.

## Known failure modes

- Unsupported chain identifier returns empty or error response
- movements array is empty when no whale activity is detected
- Invalid chain parameter may result in a 400 or malformed response
- Payment not accepted results in 402 Payment Required
- Rate limiting or service unavailability returns 5xx error

## How this service works

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

## Output

Returns a JSON object with the queried chain name and an array of whale movement records, which may include large wallet addresses, transaction sizes, and directional signals. Movements array may be empty if no significant activity is detected.

## 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-f8b7db11/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402ninnin.vercel.app](https://www.zero.xyz/host/x402ninnin.vercel.app/llms.txt)