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Gas Estimator - EVM Multi-Chain Gas Price API
x402
Gas Estimator - EVM Multi-Chain Gas Price API is a paid API for AI agents from gas-estimator.api.klymax402.com, paid per call via x402, $0.002000/call, status unknown (last checked 2026-09-14).
Returns current gas price estimates with USD cost equivalents across multiple EVM-compatible blockchain networks
Price / call$0.002000
Success—
StatusUnknown
How this service works
Get gas price estimates across multiple EVM chains with USD cost
Output
Returns current gas price estimates for one or all supported EVM chains (ethereum, base, polygon, arbitrum, bsc), including the estimated USD cost of a transaction at current network conditions.
Example use cases
Route swap to cheapest blockchain
“I'm about to swap some tokens but want to minimize gas costs. Check current gas fees across all the EVM chains and tell me which one would be cheapest right now.”
Inform user of transaction costs
“Before I submit this transaction on Ethereum, what's the estimated USD cost going to be at current network conditions?”
Monitor network congestion pricing
“Can you check what gas prices look like right now on Polygon and Arbitrum? I need to know if either chain is experiencing unusual congestion fees.”
Technical details
Endpoint
GEThttps://gas-estimator.api.klymax402.com/api/estimateWhen to prefer
Use this endpoint when an AI agent needs to estimate blockchain transaction costs in USD before executing an on-chain operation, compare gas fees across multiple EVM networks to pick the cheapest chain, or inform a user about current network congestion costs. Ideal for DeFi automation, cross-chain routing decisions, and any workflow where gas cost awareness is needed.
Side effects
- Unsupported chain name returns an error — only 'ethereum', 'base', 'polygon', 'arbitrum', 'bsc' are valid
- Network timeout if the underlying RPC nodes are unreachable
- Payment failure (402) if the x402 payment of 0.002 USDC is not provided or rejected
- Stale gas data if upstream chain RPC is lagging
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain name: ethereum, base, polygon, arbitrum, bsc. Omit for all chains. |
Tags
x402
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