{"uid":"cap_mE7lY4vOjP5ztGoaqHI8Y","slug":"basebuilder-defi-bridge-fees-02ca515e","name":"BaseBuilder DeFi Bridge Fees","description":"BaseBuilder Defi API hub - 22 paid endpoints","url":"https://bb-defi.vercel.app/api/bridge/fees","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.122869","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":"$0.122869/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.122869","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.122869","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gZm32Svm3ctgngkWYsJ1s","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.122869","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates cross-chain bridge fees for DeFi token transfers via the BaseBuilder DeFi API hub","exampleAgentPrompt":"What would the bridge fees be to move 500 USDC from Ethereum mainnet to Base chain right now?","exampleUseCases":null,"resultDescription":"Returns a fee breakdown for a cross-chain bridge transaction, including estimated gas costs, protocol fees, and total cost in the relevant token and/or USD equivalent for the specified route and amount.","failureModes":["Unsupported source or destination chain returns an error or empty result","Invalid token address or unsupported token pair returns a validation error","Network congestion may cause stale or unavailable fee quotes","Payment of $0.122869 USDC required per call via x402 protocol; missing payment returns 402","Amount too small or too large for bridge route may return out-of-range error"],"whenToPreferThis":"Use this endpoint when you need to estimate or display bridge fees before executing a cross-chain DeFi transfer, particularly for routes involving the Base network. Prefer this over generic DEX fee estimators when the user specifically wants cross-chain bridging cost information rather than in-chain swap fees.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:44:34.929Z","isFirstParty":false}