{"uid":"cap_darHYVrv0wZ25F7MdxxO_","slug":"synapse-api-aptos-gas-estimator-c4cd2c9c","name":"Synapse API — Aptos 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/aptos/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_Rx2SONOXy_7I-PYx-8K0d","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 Aptos blockchain given sender, recipient, value, and calldata","exampleAgentPrompt":"Estimate the gas fees for an Aptos transaction from my wallet 0xABC123 to 0xDEF456 with a value of 100 APT and no calldata.","exampleUseCases":[{"title":"Pre-flight fee check for APT transfer","prompt":"Before I send 50 APT from address 0x1a2b3c to 0x4d5e6f, can you estimate how much gas that transaction will cost on Aptos?"},{"title":"Gas estimation for smart contract interaction","prompt":"I want to call a contract on Aptos — the target is 0xcontract123, my wallet is 0xmywallet456, and the calldata is 0xabcdef. What's the estimated gas fee?"},{"title":"Budget gas for DeFi swap on Aptos","prompt":"I'm planning an Aptos DeFi swap sending value 200 from address 0xswapper1 to 0xdex2 with data 0x12345678 — can you estimate the transaction gas cost so I can budget my fees?"}],"resultDescription":"Returns an estimated gas cost for the specified Aptos transaction, including the computed fee in native units, allowing callers to budget transaction costs before submission.","failureModes":["Invalid or malformed address fields return a 400 error","Unsupported or invalid calldata format causes estimation failure","Network connectivity issues to Aptos RPC nodes may cause timeouts","Missing required fields (from/to) result in validation errors","Value field with non-numeric or improperly formatted strings may fail parsing"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call gas estimate for an Aptos-specific transaction without running your own Aptos node. Preferable over generic blockchain gas estimators when you are specifically working on the Aptos network and need low-latency pre-flight fee checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:02:00.368Z","isFirstParty":false}