{"uid":"cap_Cg4auuO_tHdOV68Szi0Ov","slug":"biosfera-gas-now-evm-chain-gas-price-oracle-2eb6406f","name":"Biosfera Gas Now — EVM Chain Gas Price Oracle","description":"Use when you need current gas prices on Base, Ethereum, Arbitrum, Optimism or Polygon before sending a transaction: legacy gas price, latest base fee and suggested priority fee in gwei, plus the block they refer to.","url":"https://biosfera.46-62-215-147.sslip.io/o/gas-now?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","required":["chain"],"properties":{"chain":{"enum":["base","ethereum","arbitrum","optimism","polygon"],"type":"string"}},"additionalProperties":false}},"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_Wa03ZAZOqcDjsDOcrwOWh","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 prices (legacy price, base fee, priority fee) in gwei for Base, Ethereum, Arbitrum, Optimism, or Polygon, along with the reference block number.","exampleAgentPrompt":"Before I send this transaction, what's the current gas price on Base — give me the base fee, priority fee, and legacy gas price in gwei.","exampleUseCases":[{"title":"Pre-transaction gas check on Ethereum","prompt":"What's the current base fee and suggested priority fee on Ethereum mainnet right now? I want to know what gas to set before submitting my transfer."},{"title":"Gas cost monitoring on Polygon","prompt":"Check the current gas price on Polygon for me — I need the legacy gas price and the latest base fee in gwei so I can decide whether to wait or send now."},{"title":"Multi-chain gas comparison for DeFi bot","prompt":"Pull the current gas prices on Arbitrum and Optimism — I need the base fee and priority fee in gwei for each so my bot can pick the cheaper chain to execute on."}],"resultDescription":"Returns current gas pricing data for the requested EVM chain: legacy gas price in gwei, latest base fee in gwei, suggested priority fee (miner tip) in gwei, and the block number these values correspond to.","failureModes":["Invalid or unsupported chain value returns an error (only base, ethereum, arbitrum, optimism, polygon are accepted)","Missing required 'chain' query parameter returns a validation error","Network connectivity issues to the RPC provider may return a timeout or 503","Stale data if the underlying RPC node is lagging behind the chain tip"],"whenToPreferThis":"Use this endpoint when you need real-time EVM gas prices across major chains (Base, Ethereum, Arbitrum, Optimism, Polygon) before submitting a transaction. Prefer it over on-chain calls when you want a quick REST API lookup without running your own node or RPC integration. It provides both EIP-1559 (base fee + priority fee) and legacy gas price in a single call, making it ideal for transaction fee estimation in wallets, bots, and DeFi automation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T12:42:17.673Z","isFirstParty":false,"canonicalSlug":"biosfera-gas-now-evm-chain-gas-price-oracle-2eb6406f"}