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Multi-Chain Gas Oracle & Whale Watch – /whale-watch
x402
Multi-Chain Gas Oracle & Whale Watch – /whale-watch is a paid API for AI agents from gas-optical-production-30aa.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-17).
Returns live large-value ETH transfer events on Base, filtering transfers above a threshold (default 1000 ETH), along with count, timestamp, sender/receiver addresses, transaction hashes, and ETH values.
Price / call$0.001
Success—
StatusUnknown
How this service works
Live gas prices across Base, Ethereum, Arbitrum, and Optimism, plus ETH price, block number, gas prediction, and large Base whale transfers. Paid via x402 on Base mainnet.
Output
Returns a JSON object with: a count of qualifying transfers, a Unix timestamp, a threshold_eth value used for filtering, and a transfers array where each entry includes from address, to address, token symbol (ETH), transaction hash, and value in ETH for transfers exceeding the threshold on Base mainnet.
Example use cases
DeFi trading signal from whale moves
“Show me all large ETH transfers on Base from the last few minutes — I want to see who's moving more than 1000 ETH so I can decide whether to adjust my position.”
On-chain alert bot for whale activity
“Keep an eye on big ETH transfers happening on Base right now and tell me every time a whale moves more than 1000 ETH, including the sender, receiver, and tx hash.”
Research report on Base whale behavior
“Pull the latest whale watch data from Base mainnet for me — I need the count of large transfers, the ETH values, and the wallet addresses involved so I can include them in my on-chain activity report.”
Technical details
Endpoint
GEThttps://gas-optical-production-30aa.up.railway.app/whale-watch?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need real-time large-value ETH transfer surveillance on the Base network, particularly for whale-watching, trading signals, or on-chain anomaly detection. It is distinct from gas oracle endpoints on the same host and is best suited for agents monitoring market-moving wallet activity rather than fee estimation.
Side effects
- No transfers above threshold in recent blocks — returns empty transfers array with count 0
- Payment not fulfilled via x402 — returns 402 Payment Required
- Railway hosting downtime — 503 Service Unavailable
- Base RPC node latency or outage — may return stale or incomplete data
- Invalid or malformed request parameters — 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"timestamp": 1710000000,
"transfers": [
{
"to": "0x2222...",
"from": "0x1111...",
"token": "ETH",
"tx_hash": "0xabc123",
"value_eth": 2500.5
}
],
"threshold_eth": 1000
}
}Tags
x402
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