{"uid":"cap_x4L-1FaC0O49DSex2ifui","slug":"gas-price-tracker-b69267ed","name":"Gas Price Tracker","description":"Gas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.002 USDC/call; failed calls are free.","url":"https://x402-seller-pmlm.onrender.com/gas?utm_source=zero.xyz","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":{"enum":["all","ethereum","base","arbitrum","polygon","solana"],"type":"string","description":"One chain or all (default)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["chains"],"properties":{"chains":{"type":"array","items":{"type":"object","properties":{"chain":{"type":"string"},"baseFeeGwei":{"type":"number"},"costStandard":{"type":"object"},"priorityFeeGwei":{"type":"object"}}}},"generatedAt":{"type":"string"},"cheapestEvmForErc20Transfer":{"type":["string","null"]}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-QtH_G7V3_RrXDZUzjzoH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live base fees, priority fee tiers, max fees, block congestion, and USD transaction cost estimates for Ethereum, Base, Arbitrum, Polygon, and Solana in a single call.","exampleAgentPrompt":"What are the current gas fees across all chains — Ethereum, Base, Arbitrum, Polygon, and Solana — including the slow, standard, and fast priority fee tiers, block congestion, and how much a swap would cost in USD on each?","exampleUseCases":[{"title":"Cheapest chain for token swap","prompt":"I want to do a token swap but gas fees are killing me — which chain is cheapest right now, and how much would the swap cost in USD on Base, Arbitrum, and Polygon?"},{"title":"Pre-trade gas cost check","prompt":"Before I submit this ERC-20 transfer, tell me the current standard gas price on Ethereum in Gwei and what the USD cost of that transfer will be."},{"title":"Real-time gas dashboard for all chains","prompt":"Give me a live gas price snapshot across all supported chains — Ethereum, Base, Arbitrum, Polygon, and Solana — with base fee, priority tiers, and which one is the cheapest for an ERC-20 transfer right now."}],"resultDescription":"A JSON object containing an array of chain entries, each with baseFeeGwei, priorityFeeGwei tiers (slow/standard/fast), maxFee, block congestion level, and estimated USD costs for a native transfer, ERC-20 transfer, and swap. Also includes a generatedAt timestamp and the identifier of the cheapest EVM chain for ERC-20 transfers.","failureModes":["400 Bad Request — invalid chain parameter value supplied","422 Unprocessable Entity — chain node unreachable or no data found for the requested chain","503 Service Unavailable — server is busy; retry after a short delay"],"whenToPreferThis":"Choose this endpoint when you need a single API call to compare real-time gas fees across multiple chains simultaneously, including USD cost estimates for common transaction types (transfer, ERC-20, swap) and an automatic cheapest-chain recommendation. Prefer this over chain-specific RPC calls when you need multi-chain aggregation without managing multiple node connections.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:40:56.931Z","isFirstParty":false,"canonicalSlug":"gas-price-tracker-b69267ed"}