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x402 Gas Price Oracle
x402
x402 Gas Price Oracle is a paid API for AI agents from agentx402pay.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Returns current gas price and EIP-1559 fee estimates (base fee, priority fee) for major EVM chains including Base, Ethereum, Polygon, Arbitrum, and Optimism
Price / call$0.01
Success—
StatusUnknown
How this service works
Current gas price and EIP-1559 fee estimate for a chain (base, ethereum, polygon, arbitrum, optimism)
Output
Returns the current gas price and EIP-1559 fee breakdown (base fee and priority fee/max fee) for the requested EVM-compatible chain. Data reflects live on-chain conditions for chains including Base, Ethereum, Polygon, Arbitrum, and Optimism.
Example use cases
Pre-transaction gas check on Ethereum
“Before I send this Ethereum transaction, can you check what the current gas price and EIP-1559 fees look like on Ethereum mainnet so I know how much to budget?”
Find cheapest chain to transact on
“I need to make an on-chain transaction and want to pick the cheapest network — can you check current gas prices on Base, Polygon, and Arbitrum for me?”
DeFi bot gas monitoring on Base
“What's the current base fee and priority fee on Base chain right now? I need to know if gas is low enough to execute my DeFi trade profitably.”
Technical details
Endpoint
GEThttps://agentx402pay.com/api/gas-price?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs real-time gas fee data for EVM-compatible chains before submitting transactions, estimating costs, or deciding which chain to use. Prefer this over general crypto market APIs when you specifically need network fee data (gas) rather than token prices or market cap data.
Side effects
- Unsupported chain name returns an error or defaults to Base
- Stale data if upstream node is lagging
- Network connectivity issues causing timeout
- Invalid query parameter format returning a 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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