{"uid":"cap_7hXTwhKe7VWeqPoxUD_OY","slug":"basebuilder-defi-bridge-swap-rate-de44e8f9","name":"BaseBuilder DeFi Bridge Swap Rate","description":"BaseBuilder Defi API hub - 22 paid endpoints","url":"https://bb-defi.vercel.app/api/bridge/swap-rate","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.145638","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":"$0.145638/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.145638","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.145638","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Sg1aaXvkwhg_4FEwYwHhn","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.145638","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current swap rate for bridging tokens across chains via the BaseBuilder DeFi bridge","exampleAgentPrompt":"What's the current bridge swap rate on BaseBuilder DeFi to convert 1 ETH from Ethereum mainnet to USDC on Base chain?","exampleUseCases":null,"resultDescription":"Returns the current exchange/swap rate for bridging the specified token pair across chains, including the expected output amount and any associated bridge fees.","failureModes":["Unsupported token pair returns an error or null rate","Unsupported source/destination chain combination returns error","Invalid or missing required parameters returns 400 bad request","Payment not received or insufficient funds returns 402","Service unavailable or provider downtime returns 503","Extremely low liquidity may return an unusable rate"],"whenToPreferThis":"Use this endpoint when you need a real-time bridge swap rate quote between two tokens on different chains, specifically when operating within the BaseBuilder DeFi ecosystem or targeting Base chain. Prefer this over generic DEX aggregators when you specifically want bridge rates (cross-chain) rather than same-chain swaps.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:35:29.469Z","isFirstParty":false}