{"uid":"cap_jeFDzgxqwjQCoq5sha0uh","slug":"synapse-api-bnb-chain-gas-estimator-36cdee56","name":"Synapse API — BNB Chain 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/bnb/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_MiIa8GKGqhIMKKpwBkCmW","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 gas costs for a transaction on the BNB Smart Chain network given transaction parameters","exampleAgentPrompt":"Estimate the gas needed for a BNB Smart Chain transaction from 0xAbC...123 to 0xDeF...456 with a value of 0.5 BNB and no calldata.","exampleUseCases":[{"title":"Pre-flight check for BNB transfer","prompt":"Before I send 1 BNB from my wallet 0xAbC...123 to 0xDeF...456, can you estimate how much gas I'll need so I know if I have enough for fees?"},{"title":"Smart contract call gas estimate","prompt":"I'm about to call a smart contract on BNB Smart Chain — the contract is at 0xContractAddr, the calldata is 0xa9059cbb000...abc, and I'm calling from 0xMyWallet. What's the estimated gas cost?"},{"title":"DeFi swap cost estimation","prompt":"Can you estimate the gas for a swap transaction on BSC? Sender is 0xUser123, recipient is 0xRouterContract, value is 0, and the encoded swap data is 0x38ed1739..."}],"resultDescription":"Returns an estimated gas amount (in gas units) for the described BNB Smart Chain transaction, allowing callers to set appropriate gas limits and calculate total transaction costs before submission.","failureModes":["Invalid or malformed Ethereum-style address for 'to' or 'from' fields returns an error","Malformed hex data in 'data' field may cause estimation failure","Transaction that would revert on-chain may return an estimation error or revert message","Network unavailability or RPC issues may result in timeout or 500 error","Missing required fields may return a validation error"],"whenToPreferThis":"Use this endpoint when you need a quick, pay-per-call gas estimate for a BNB Smart Chain (BSC) transaction without running your own BNB node or RPC infrastructure. Ideal for agents that need to pre-flight a transaction cost check before executing on-chain, or for wallets and DeFi tools that need to set gas limits dynamically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:57:46.222Z","isFirstParty":false}