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EVM Gas Price
x402
EVM Gas Price is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns the current gas price and base fee for a supported EVM chain in wei and gwei, plus the estimated cost of a plain ETH transfer.
Price / call$0.005
Success—
StatusUnknown
How this service works
60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.
Output
Returns a JSON object with the current gas price in wei (as a string), gas price in gwei (as a number), and the estimated cost of a plain 21,000-gas ETH transfer in ether (as a number) for the requested chain.
Example use cases
Pre-transaction gas check on Ethereum
“Before I send this ETH transaction, can you check what the current gas price is on Ethereum and tell me the estimated cost of a plain transfer in ether?”
Cheapest chain selection for transfer
“I want to send ETH and I'm considering Base, Polygon, or Arbitrum — can you pull the current gas prices on all three so I can pick the cheapest one?”
Gas monitoring for DeFi bot
“Check what the current gas price in gwei is on Optimism right now and let me know the estimated cost of a plain transfer — I need this before my bot submits any transactions.”
Technical details
Endpoint
POSThttps://flat-rate-llm.kikoribera03.workers.dev/v1/evm/gasWhen to prefer
Use this endpoint when an agent needs to inspect current gas conditions on a specific EVM-compatible chain before deciding whether to submit a transaction, estimate transaction fees, or compare cost across chains. Prefer it over on-chain RPC calls when you want a simple, pre-parsed result in both wei and gwei with a plain-transfer cost estimate included at a flat rate.
Side effects
- Unsupported chain name returns an error — only base, ethereum, polygon, arbitrum, optimism are valid
- Network congestion or RPC node downtime may cause stale or failed responses
- Payment not included or incorrect amount results in 402 Payment Required
- Gas price spikes between query and transaction submission mean the estimate may be outdated instantly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | base | ethereum | polygon | arbitrum | optimism. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| gasPriceWei | string | |
| gasPriceGwei | number | |
| transferCostEther | number |
Tags
x402
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