{"uid":"cap_QGdM28J3MtBcqJhoTRYPz","slug":"chain-gas-price-lookup-1a3a872a","name":"Chain Gas Price Lookup","description":"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.","url":"https://store.agentexchange.work/chain/gas","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"chain":{"type":"string","description":"base|ethereum|optimism|arbitrum|polygon|gnosis (default ethereum)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"fast":{"type":"number"},"slow":{"type":"number"},"average":{"type":"number"}}}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{"chain":"ethereum"}}},"response":{"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}},"exampleRequest":{"chain":"ethereum"},"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.09","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.09","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JBijT0_AC1sb606PyuEzB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.09","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current gas prices (fast, average, slow) in gwei for a specified EVM-compatible blockchain","exampleAgentPrompt":"What are the current gas prices on Base — give me the fast, average, and slow estimates in gwei.","exampleUseCases":null,"resultDescription":"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'}.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:33:50.475Z","isFirstParty":false}