# Coin Railz Whale Alert Monitor

> Coin Railz Whale Alert Monitor is a paid API for AI agents from coinrailz.com, paid per call via x402, $0.35/call, status unknown (last checked 2026-09-14).

Tracks large on-chain wallet movements (whale transactions) across specified blockchains with configurable minimum USD value and token filters

## Facts

- Endpoint: POST https://coinrailz.com/x402/service/whale-alerts
- Price: $0.35/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coin-railz-whale-alert-monitor-2741fa84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CWR3KC4lLBS2me20sLRko

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 coin-railz-whale-alert-monitor-2741fa84 -d '<json body>'
```

Example prompt: Show me recent whale transactions on Ethereum and BNB Chain worth at least $500,000, especially for USDC and WETH token addresses.

## When to prefer this

Use this endpoint when you need real-time on-chain surveillance of large wallet movements across one or more blockchains, optionally filtered by minimum USD value or specific token contracts. Prefer this over general market data endpoints when you care specifically about individual large transactions rather than aggregate price or volume data.

## Known failure modes

- Invalid chain identifiers return error or empty results
- Extremely low minValueUsd thresholds may return very large result sets
- Invalid token contract addresses may return no results
- Payment failure via x402 protocol blocks the request
- Temporary blockchain node unavailability may cause stale or missing data

## How this service works

Track large wallet movements (whales) with on-chain transaction monitoring

## Output

Returns an array of recent whale transactions matching the specified chains, minimum USD value, and token filters, including details about each large on-chain movement detected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chains": {
   "type": "array",
   "description": "Chains to monitor (optional)"
  },
  "minValueUsd": {
   "type": "number",
   "description": "Minimum transaction value in USD (optional)"
  },
  "tokenAddresses": {
   "type": "array",
   "description": "Specific tokens to watch (optional)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "transactions": {
   "type": "array",
   "description": "Recent whale movements"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coin-railz-whale-alert-monitor-2741fa84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinrailz.com](https://www.zero.xyz/host/coinrailz.com/llms.txt)