{"uid":"cap_WBr9qR6oj_PDa5a2cfpzK","slug":"synapse-api-soneium-gas-estimator-e808342c","name":"Synapse API — Soneium 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/soneium/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_9h0lbWNUdXVbGTBXOHBQ5","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 cost for a transaction on the Soneium blockchain network before submission","exampleAgentPrompt":"Before I send this transaction on Soneium — from 0xAbCd...1234 to 0x5678...EfGh with a value of 0.1 ETH and calldata 0xabcdef — can you estimate how much gas it'll cost?","exampleUseCases":[{"title":"Pre-flight check before DeFi swap","prompt":"I'm about to execute a swap on a Soneium DEX. Can you estimate the gas cost first? The transaction goes from 0xSenderAddress to 0xDEXContractAddress with calldata 0xswapCalldata and value 0.05 ETH."},{"title":"Smart contract deployment cost preview","prompt":"Before I deploy my NFT contract on Soneium, can you estimate how much gas that will take? The deployer is 0xMyWallet, the deployment data is 0xcontractBytecode, and there's no ETH value attached."},{"title":"Token transfer gas budgeting","prompt":"I need to send some tokens on Soneium from 0xMyAddress to 0xRecipientAddress using the ERC-20 transfer calldata 0xa9059cbb... — what's the estimated gas cost so I can make sure I have enough?"}],"resultDescription":"Returns an estimated gas amount (in gas units) required to execute the described transaction on the Soneium network, allowing callers to forecast fees before broadcasting the transaction on-chain.","failureModes":["Invalid or malformed address fields (to/from) may return a validation error","Malformed or non-hex data field may cause estimation failure","Insufficient or missing required fields may return a 400 Bad Request","Soneium RPC node unavailability may cause timeouts or 503 errors","Transactions that would revert on-chain may return an execution error instead of a gas estimate"],"whenToPreferThis":"Use this endpoint when you need a gas estimate specifically for the Soneium blockchain network before committing to a transaction. Prefer this over generic gas estimation tools when your transaction targets a Soneium contract or address, and you want a pay-per-call approach without managing RPC infrastructure yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:06:01.745Z","isFirstParty":false}