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agent402.tools Gas Price Estimator
x402
agent402.tools Gas Price Estimator is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns current gas price in gwei and wei for a specified EVM blockchain network (Base, Polygon, Arbitrum, Optimism, or Ethereum)
Price / call$0.002
Success—
StatusUnknown
How this service works
Current gas price (gwei and wei) on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, Sei, or Robinhood Chain - for an agent budgeting a transaction. Read-only. ?network=base
Output
Returns the current gas price for the requested EVM network expressed in both gwei (human-readable) and wei (machine-precision), along with the network name. This gives an agent everything it needs to estimate transaction costs before committing to an on-chain operation.
Example use cases
Example prompt
“Before I submit this transaction, can you check the current gas price on Arbitrum so I know how much to budget?”
Technical details
Endpoint
GEThttps://agent402.tools/api/gas-estimateWhen to prefer
Use this endpoint when an agent needs to budget or gate a blockchain transaction by checking real-time gas prices before submission. Ideal for any workflow that involves EVM-compatible chains (Base, Polygon, Arbitrum, Optimism, Ethereum) where cost estimation is required before executing a smart contract call or token transfer.
Side effects
- Invalid or unsupported network name returns an error — only base, polygon, arbitrum, optimism, ethereum are accepted
- Network RPC unavailable may cause a timeout or upstream error
- Payment failure (x402) if the 0.002 USDC fee is not supplied correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "base",
"gasPriceWei": "5100000",
"gasPriceGwei": "0.0051"
}
}Tags
x402
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