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klymax402 Gas Estimator
x402
klymax402 Gas Estimator is a paid API for AI agents from klymax402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns current gas fee estimates for one or all supported EVM-compatible blockchain networks
Price / call$0.005
Success—
StatusUnknown
How this service works
One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.
Output
A JSON object containing an array of gas fee estimates per chain (or a single chain if specified), along with a timestamp indicating when the estimates were fetched. Each estimate includes fee data relevant to transaction cost on the queried network(s).
Example use cases
Pre-transaction gas cost comparison
“Before I send this token transfer, can you check what gas fees look like on Ethereum, Base, and Arbitrum right now so I pick the cheapest chain?”
DeFi strategy gas monitoring
“What are the current gas prices across all supported chains? I'm trying to figure out the best time and network to execute my DeFi trade.”
Single-chain fee check for BSC
“Can you get me the latest gas estimate specifically for BSC? I have a contract interaction I need to run there.”
Technical details
Endpoint
GEThttps://klymax402.com/api/gas-estimator/api/estimateWhen to prefer
Use this endpoint when you need real-time gas fee estimates for EVM-compatible chains (Ethereum, Base, Polygon, Arbitrum, BSC) without managing your own RPC connections or gas oracle integrations. It is especially useful when comparing fees across multiple chains in a single call and when operating in an x402 payment-enabled agent workflow where no API key management is desired.
Side effects
- Invalid chain name returns empty estimates or error response
- Network connectivity issues to upstream gas data sources may return stale or empty data
- Unsupported chain identifier results in no matching estimate entries
- Payment failure (HTTP 402) if USDC payment on Base is not provided or insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Chain name: ethereum, base, polygon, arbitrum, bsc. Omit for all chains. |
Output
Schema · Response
{
"type": "json",
"example": {
"estimates": [],
"timestamp": "example"
}
}Tags
x402
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