{"uid":"cap_5T6AljRkmIfJY3mJpOwaK","slug":"nojunk-chain-gas-fee-estimator-1f837985","name":"NoJunk Chain Gas Fee Estimator","description":"Blockchain Data gas: Current gas price, base fee and priority-fee percentiles in gwei for one or all 7 EVM chains (eth_feeHistory, 5 blocks), or Bitcoin sat/vB fee estimates.","url":"https://nojunk-chain.mick8511.workers.dev/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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"chain":{"type":"string","description":"Optional: base, ethereum, bsc, arbitrum, polygon, optimism, avalanche, bitcoin or all (default all = the 7 EVM chains)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5fpXWTUVK9chsduP0ELiE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current gas price, base fee, and priority-fee percentiles in gwei for up to 7 EVM chains, or sat/vB fee estimates for Bitcoin, using eth_feeHistory over 5 blocks.","exampleAgentPrompt":"What are the current gas prices on Ethereum and Arbitrum — give me the base fee and priority fee percentiles in gwei so I can decide when to send my transaction.","exampleUseCases":[{"title":"Pre-transaction gas check on Ethereum","prompt":"Before I submit this Ethereum transaction, what's the current base fee and priority fee on Ethereum so I can set a competitive tip?"},{"title":"Multi-chain gas price comparison","prompt":"Pull the current gas prices for all 7 EVM chains — I want to see which one has the cheapest fees right now before I decide where to bridge my funds."},{"title":"Bitcoin fee estimate for urgent transfer","prompt":"What are the current sat/vB fee estimates for Bitcoin? I need to send a transaction and want to know how much to pay to get it confirmed quickly."}],"resultDescription":"Returns current gas data including gas price, base fee, and priority-fee percentiles in gwei derived from the last 5 blocks via eth_feeHistory, for one specified EVM chain or all 7 supported EVM chains (Ethereum, Base, BSC, Arbitrum, Polygon, Optimism, Avalanche). For Bitcoin, returns fee estimates in sat/vB.","failureModes":["Invalid chain parameter returns error or falls back to all chains","Chain RPC node temporarily unavailable causing stale or missing data","Payment not completed results in 402 response blocking data access","Network congestion may cause slight delays in fee history retrieval"],"whenToPreferThis":"Choose this endpoint when you need real-time gas fee data across multiple EVM chains or Bitcoin in a single call, especially when you want percentile breakdowns (not just a single estimate) to make informed fee decisions. Ideal for agents that need to compare fees cross-chain or monitor gas conditions before executing transactions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T12:31:04.752Z","isFirstParty":false,"canonicalSlug":"nojunk-chain-gas-fee-estimator-1f837985"}