{"uid":"cap_JAYnI8mWu1kv0LlolUGZ1","slug":"synapse-api-arbitrum-gas-estimator-deeb34e0","name":"Synapse API — Arbitrum 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/arbitrum/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_FmfEXDOn352n1M70w48-5","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 Arbitrum network given sender, recipient, calldata, and value","exampleAgentPrompt":"Estimate the gas needed for an Arbitrum transaction from 0xSenderAddress to 0xContractAddress with calldata 0xabcdef and a value of 0 ETH.","exampleUseCases":[{"title":"DeFi swap gas cost check","prompt":"Before I execute this Uniswap swap on Arbitrum, can you estimate the gas cost? The transaction goes from 0xMyWallet to 0xUniswapRouter with this calldata: 0x38ed1739... and a value of 0."},{"title":"Smart contract deployment preflight","prompt":"I'm about to deploy a smart contract on Arbitrum — can you estimate the gas fees first? The sender is 0xDeployerWallet, there's no recipient yet, and the bytecode data is 0x6080604052..."},{"title":"Batch transfer cost estimation","prompt":"I want to know how much gas an ERC-20 batch transfer will cost on Arbitrum before I send it. From 0xTreasuryWallet to 0xBatchContract, calldata is 0xa9059cbb..., value is 0."}],"resultDescription":"Returns an estimated gas value (in gas units) for the described Arbitrum transaction, allowing callers to anticipate fees before broadcasting to the network.","failureModes":["Invalid or malformed address in 'to' or 'from' fields returns an error","Invalid calldata hex string causes a parse or simulation error","Simulation reverts if the transaction would fail on-chain (e.g., insufficient balance or bad contract call)","Missing required fields may return a 400 bad request","Network congestion or RPC issues may cause timeout or degraded accuracy"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call gas estimate for Arbitrum specifically, without managing your own RPC node or paying for a full node subscription. It is ideal for agents that need pre-flight cost checks before executing L2 transactions on Arbitrum.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:57:08.781Z","isFirstParty":false}