{"uid":"cap_481nKMcgVmfznUoJB9ZkE","slug":"basebuilder2-crypto-gas-estimate-9f497ed4","name":"Basebuilder2 Crypto Gas Estimate","description":"BaseBuilder Crypto API hub - 26 paid endpoints","url":"https://bbx-crypto.vercel.app/api/gas-estimate?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.074561","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":"$0.074561/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.074561","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.074561","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wnr-uOvrH4dPbF2uutz3W","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.074561","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Estimates blockchain gas fees for a given transaction or network, returning cost projections in crypto units","exampleAgentPrompt":"What will the gas fee be for sending 0.5 ETH on the Ethereum mainnet right now — give me estimates for slow, standard, and fast confirmation speeds.","exampleUseCases":[{"title":"Pre-flight transaction cost check","prompt":"Before I submit this ERC-20 token transfer on Base mainnet, estimate the gas cost so I know if it's worth doing at current network prices."},{"title":"Smart contract deployment budget","prompt":"I'm about to deploy a new smart contract on Ethereum — can you estimate the gas fees I should expect so I can plan my budget?"},{"title":"DeFi swap cost evaluation","prompt":"I want to swap USDC for ETH on Ethereum mainnet — estimate the gas fees for this swap so I can decide if the trade is profitable after costs."}],"resultDescription":"Returns a gas cost estimate including base fee, priority fee (miner tip), estimated total gas in gwei, and projected transaction cost in ETH and/or USD, typically broken down by confirmation speed tier (slow/standard/fast).","failureModes":["Invalid or unsupported chain ID returns 400 error","Missing required transaction parameters returns validation error","Network congestion or RPC node unavailability causes timeout","Malformed contract address returns parsing error","Insufficient metadata to estimate complex contract interactions"],"whenToPreferThis":"Use this endpoint when you need a quick, paid gas estimation without running your own blockchain node, especially on Base or Ethereum networks. Prefer this over free public estimators when reliability and uptime guarantees matter, or when integrating into an automated payment or transaction workflow that requires programmatic access.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T06:51:23.501Z","isFirstParty":false,"canonicalSlug":"basebuilder2-crypto-gas-estimate-9f497ed4"}