{"uid":"cap_DWwlpIWkQ_RgnGbhBg2CV","slug":"basebuilder-defi-optimal-bridge-gas-estimator-ab88e55e","name":"BaseBuilder DeFi Optimal Bridge Gas Estimator","description":"BaseBuilder Defi API hub - 22 paid endpoints","url":"https://bb-defi.vercel.app/api/gas/optimal-bridge","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.120765","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":"$0.120765/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.120765","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.120765","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OdfjogzCorjumUvBAWcUM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.120765","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the optimal bridging route and gas cost recommendation for cross-chain DeFi token transfers","exampleAgentPrompt":"What's the optimal bridge route and gas cost for moving 500 USDC from Base to Ethereum mainnet right now?","exampleUseCases":null,"resultDescription":"Returns the recommended bridge protocol, optimal gas price in gwei, estimated transaction fee in USD and native token, and expected confirmation time for the specified cross-chain transfer","failureModes":["Unsupported source or destination chain returns 400 with invalid chain error","Unsupported token pair returns 400 with unsupported asset error","Amount too small for bridging returns 400 with minimum amount error","Network congestion causing stale gas data returns 503","Payment not received or insufficient USDC returns 402 payment required","Rate limiting if too many requests returns 429"],"whenToPreferThis":"Use this endpoint when you need to determine the most cost-efficient bridge route and gas price for a cross-chain token transfer on Base and EVM-compatible chains; particularly useful before executing a bridge transaction to avoid overpaying on gas or choosing a suboptimal protocol","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:43:01.827Z","isFirstParty":false}