{"uid":"cap_Qhb5TjKPMYZ_B44lv5_tD","slug":"vextorium-evm-gas-estimator-771899b7","name":"Vextorium EVM Gas Estimator","description":"558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.","url":"https://api.vextorium.com/v1/evm-estimate-gas?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"a":{"type":"string"},"data":{"type":"string"},"from":{"type":"string"},"value":{"type":"number"},"network":{"enum":["base","ethereum","arbitrum","optimism","polygon","bnb","avalanche","gnosis","line","scroll","sonic","unichain"],"type":"string","description":"Chain (default base)"}}},"responseSchema":{"type":"json","example":{"native":"ETH","network":"base","executable":true,"estimated_gas":30989,"estimated_cost":1.859e-7,"gas_price_gwei":0.006,"recommended_gas":37186}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_A5Muz8VH8M1OUA9kN7VTy","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Estimates gas cost and recommended gas limit for a transaction on EVM-compatible chains (Base, Ethereum, Arbitrum, Optimism, Polygon, etc.) before submitting it.","exampleAgentPrompt":"Before I send this transaction, estimate how much gas it will cost on Base — the sender is 0xABC...123, the recipient is 0xDEF...456, and there's no ETH value being sent, just a contract call with data 0x70a08231...","exampleUseCases":[{"title":"Pre-flight check before DeFi swap","prompt":"I'm about to swap tokens on Ethereum via a contract call — can you estimate the gas cost first? The sender is 0x1234...abcd, the contract address is 0xUniswapRouter, data is 0x38ed1739..., and I'm sending 0 ETH value."},{"title":"Arbitrum contract deployment cost estimate","prompt":"Estimate how much gas it'll cost to deploy a contract on Arbitrum — the sender is 0xDev...wallet and the transaction data is 0x608060..."},{"title":"Check if transaction is executable on Polygon","prompt":"Can you check whether this transaction is actually executable on Polygon and tell me the expected gas units and cost? From 0xMy...wallet to 0xToken...contract with data 0xa9059cbb... and no ETH value."}],"resultDescription":"Returns the estimated gas units, recommended gas limit (estimated * 1.2), gas price in gwei, estimated transaction cost in native token (e.g. ETH), the network name, native token symbol, and a boolean indicating whether the transaction is executable without reverting.","failureModes":["Transaction simulation reverts — executable=false is returned with null cost fields","Invalid or malformed from/to address causes a 400-level error","Unsupported network name causes validation failure","Missing required fields (from, a) returns a schema validation error","Node RPC unavailability may return a 5xx or timeout"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call gas estimate across 12 major EVM chains without running your own node infrastructure. It's ideal for AI agents that need to pre-validate transaction cost and executability before submitting, or for building gas-aware workflows in DeFi automation. Prefer it over raw RPC calls when you want a normalized response with both estimated and recommended gas in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:45:38.267Z","isFirstParty":false,"canonicalSlug":"vextorium-evm-gas-estimator-771899b7"}