{"uid":"cap_RieHP-j96B26stvlu-FkZ","slug":"synapse-api-katana-gas-estimator-31a4730c","name":"Synapse API — Katana Gas Estimator","description":"High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.","url":"https://synapse-api-brown.vercel.app/api/katana/gas/estimate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"to":{"type":"string"},"data":{"type":"string"},"from":{"type":"string"},"value":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/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_8S_XJIMSYLyjCK3NK8jSz","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":"Estimates the gas required for a transaction on the Katana blockchain network given sender, recipient, calldata, and value.","exampleAgentPrompt":"Estimate how much gas the following transaction will use on Katana — from 0xAbC123... to 0xDeF456..., with calldata 0xa9059cbb... and value 0.","exampleUseCases":[{"title":"Pre-flight contract call check","prompt":"Before I send this ERC-20 transfer on Katana, estimate the gas cost — from 0x1111...aaaa to 0x2222...bbbb with calldata 0xa9059cbb000000000000000000000000 and zero ETH value."},{"title":"DeFi swap gas budgeting","prompt":"I want to know how much gas a Uniswap swap call will consume on Katana — the from address is 0xAAA...111, the router contract is 0xBBB...222, and here's the encoded swap calldata: 0x38ed1739..."},{"title":"Smart contract deployment cost estimate","prompt":"Estimate the gas needed to deploy this contract on Katana — from my deployer wallet 0xDEAD...BEEF, no recipient address, and here's the contract bytecode as the data field."}],"resultDescription":"Returns a gas estimate (in gas units) for the described transaction on the Katana network, allowing callers to budget fees and set appropriate gas limits before broadcasting a transaction.","failureModes":["Invalid or malformed address in 'from' or 'to' fields returns an error","Malformed or non-hex 'data' field causes a parse error","Transaction would revert on-chain — estimation may fail with a revert reason","Network unavailability or RPC node errors cause service timeouts","Missing required fields may return a 400 bad request"],"whenToPreferThis":"Use this endpoint when you need a gas estimate specifically for the Katana blockchain network before submitting a transaction. Prefer this over generic Ethereum gas estimators when targeting Katana, and use it as a pre-flight check to avoid out-of-gas failures or to surface revert conditions before broadcasting.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:59:04.447Z","isFirstParty":false}