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Multi-Chain Gas Oracle & Whale Watch
x402
Multi-Chain Gas Oracle & Whale Watch is a paid API for AI agents from gas-optical-production-30aa.up.railway.app, paid per call via x402, $0.0001/call, status unknown (last checked 2026-10-16).
Returns live gas prices for Base, Ethereum, Arbitrum, and Optimism, plus ETH price, current block number, gas predictions, and large whale transfers on Base.
Price / call$0.0001
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
A JSON object containing real-time gas prices (in gwei or equivalent) for Base, Ethereum, Arbitrum, and Optimism; current ETH price; current block number; a gas prediction for upcoming blocks; and a list of recent large whale transfers on Base — all timestamped.
Example use cases
Cheapest chain for a transaction
“I need to send a transaction — can you check the current gas prices on Base, Ethereum, Arbitrum, and Optimism so I can figure out which chain is cheapest right now?”
Whale activity alert on Base
“Check if there are any large whale transfers happening on Base right now and tell me the current ETH price too.”
Gas cost estimate before DeFi trade
“Before I execute this DeFi trade, can you pull the latest gas prices on Ethereum and Base and give me the gas prediction so I know what fees to expect?”
Technical details
Endpoint
GEThttps://gas-optical-production-30aa.up.railway.app/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single unified call to get real-time gas prices across all four major EVM chains (Base, Ethereum, Arbitrum, Optimism) simultaneously, especially when you also want ETH price, block number, gas predictions, and Base whale activity in one response. It is particularly useful for DeFi agents optimizing transaction routing or monitoring large on-chain movements.
Side effects
- Upstream RPC node unavailability may cause stale or missing chain data
- Rate limiting if called excessively without valid x402 payment
- Payment failure (invalid or insufficient USDC) results in 402 response
- Partial data if one chain's RPC is degraded while others succeed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"base": 12.4,
"arbitrum": 0.11,
"ethereum": 18.2,
"optimism": 0.05,
"timestamp": 1710000000
}
}Tags
x402
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