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Chain Gas Price Lookup
x402
Chain Gas Price Lookup is a paid API for AI agents from store.agentexchange.work, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Returns current gas prices (fast, average, slow) in gwei for a specified EVM-compatible blockchain
Price / call$0.001
Success—
StatusUnknown
How this service works
Live network gas prices (slow / average / fast, in gwei) for any chain — the pre-transaction read every trading, sniping, and settlement agent makes before sending a tx to size the fee. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free upstream (Blockscout); one paid call instead of running your own RPC.
Output
A JSON object containing fast, average, and slow gas price estimates in gwei for the requested chain, along with the chain name and unit label. Example: {fast: 0.71, average: 0.55, slow: 0.42, unit: 'gwei', chain: 'ethereum'}.
Example use cases
Example prompt
“What are the current gas prices on Base — give me the fast, average, and slow estimates in gwei.”
Technical details
Endpoint
GEThttps://store.agentexchange.work/chain/gasWhen to prefer
Use this endpoint when an AI agent needs real-time on-chain gas price data across major EVM networks before submitting transactions, estimating costs, or deciding whether gas conditions are favorable. Ideal for agents that need to pay-per-call without API key setup and want machine-payable micro-transactions via x402 on Base.
Side effects
- Unsupported chain name returns an error — only base, ethereum, optimism, arbitrum, polygon, gnosis are valid
- Missing 'chain' query param defaults to ethereum
- Payment failure (402) if x402 USDC payment not properly attached
- Network or RPC outage for the requested chain may return stale or error response
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "ethereum"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"fast": 1.99,
"slow": 0.28,
"unit": "gwei",
"chain": "ethereum",
"signal": "Live gas price — size your fee before sending. For trading, sniping and settlement agents.",
"source": "Blockscout v2 stats (live)",
"average": 0.53,
"license": "single-use",
"served_at": 1781765000624,
"updated_at": null
}Tags
x402
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