{"uid":"cap_v-RY_R9bDWZh2hIF1Xspw","slug":"x402-toolbox-chain-gas-estimator-b537a615","name":"x402-toolbox Chain Gas Estimator","description":"309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.","url":"https://x402-toolbox.shablony-pro.workers.dev/chain/estimate-gas?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"schema":{"type":"string"}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true}},"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_Jt4s6kWd0Yf1HuHNk_xk3","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":"Estimates gas costs for a blockchain transaction on a specified chain schema via a pay-per-call x402 endpoint","exampleAgentPrompt":"Estimate the gas cost for a transaction using the 'erc20-transfer' chain schema — I want to know if it's affordable before I submit it on Base.","exampleUseCases":[{"title":"Pre-flight gas check for token transfer","prompt":"Before I send this ERC-20 token transfer on Base, can you estimate the gas cost using the 'erc20-transfer' schema so I know what fees to expect?"},{"title":"Smart contract interaction cost check","prompt":"Estimate the gas needed for a smart contract call using the 'contract-write' chain schema — I need to know the fee before my agent executes it."},{"title":"Batch transaction budget planning","prompt":"I'm planning to run 50 on-chain transactions tonight — can you estimate the gas cost per call using the 'erc20-transfer' schema so I can budget the total fees?"}],"resultDescription":"Returns a JSON object with an 'ok' boolean indicating success and a 'paid' boolean confirming x402 micropayment was processed, along with gas estimation data for the specified chain schema.","failureModes":["Invalid or unrecognized schema string returns an error or empty estimate","Missing schema parameter may cause a 400 bad request","Payment failure or insufficient USDC balance returns 402 Payment Required","Network timeout from upstream RPC node causes delayed or failed response","Unsupported chain schema returns an error"],"whenToPreferThis":"Choose this endpoint when you need a quick, no-signup gas estimate for EVM-compatible chains (especially Base) and are willing to pay $0.002 USDC per call via x402 micropayment. Ideal for AI agents that need deterministic, pay-as-you-go gas estimation without managing API keys or subscriptions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:48:58.893Z","isFirstParty":false,"canonicalSlug":"x402-toolbox-chain-gas-estimator-b537a615"}