{"uid":"cap_NDugXeraRw9JK2c5SR9Zt","slug":"agent-data-tools-gas-price-fee-estimator-9c91f4c0","name":"Agent Data Tools: Gas Price & Fee Estimator","description":"Current gas price on Optimism (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use op_receipt.","url":"https://agent-data-tools.revmesh2074.workers.dev/op/gas?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"only":{"type":"string","description":"Optional: comma-separated top-level result keys to keep, for a smaller answer (for example only=price,symbol); unknown keys are ignored and an empty match returns the full result"}}},"responseSchema":{"type":"object","properties":{"block":{"type":"number"},"chain":{"type":"string"},"symbol":{"type":"string"},"chainId":{"type":"number"},"baseFeeGwei":{"type":"string"},"gasPriceGwei":{"type":"string"},"transferCost":{"type":"string"},"priorityFeeGwei":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USD","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zYFUls_8Wc1ATAATm9_Xk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","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, priority fee, and ETH transfer cost for a specified EVM chain","exampleAgentPrompt":"What's the current gas price on Optimism right now — base fee, priority fee, and what a simple ETH transfer would cost?","exampleUseCases":[{"title":"Pre-transaction gas check on Optimism","prompt":"Before I send this ETH transfer on Optimism, can you check what the gas price and transfer cost look like right now?"},{"title":"Compare transaction costs across chains","prompt":"What's the current gas price and ETH transfer cost on Arbitrum? I'm trying to decide which chain is cheapest to transact on."},{"title":"Monitor Ethereum base fee for timing","prompt":"What's the Ethereum base fee and gas price right now? I want to know if it's a good time to submit my transaction."}],"resultDescription":"A JSON object containing the current block number, chain name and ID, base fee in Gwei, total gas price in Gwei, priority/tip fee in Gwei, and the estimated cost in ETH for a standard ETH transfer on the queried chain.","failureModes":["Unsupported chain name or ID returns an error or empty response","RPC node unavailability causes stale or failed data","Network congestion may cause slight latency in block data","Payment not confirmed results in 402 and no charge"],"whenToPreferThis":"Use this endpoint when an AI agent needs live on-chain gas fee data for Base, Ethereum, Arbitrum, Optimism, or Polygon without requiring an API key or monthly subscription — ideal for pay-per-call agentic workflows using x402/USDC micropayments.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:40:22.180Z","isFirstParty":false,"canonicalSlug":"agent-data-tools-gas-price-fee-estimator-9c91f4c0"}