{"uid":"cap_6kCsCzV0QwAnvJDNHR6X_","slug":"basebuilder-defi-bridge-fees-93d7b33f","name":"BaseBuilder DeFi Bridge Fees","description":"BaseBuilder Defi API hub - 22 paid endpoints","url":"https://bbx-defi.vercel.app/api/bridge/fees?utm_source=zero.xyz","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_KUosWuE6sEMEwKtELmV1p","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":"Returns estimated bridge fees for cross-chain token transfers in DeFi","exampleAgentPrompt":"What are the bridge fees to move 500 USDC from Ethereum mainnet to Base chain right now?","exampleUseCases":[{"title":"Pre-bridge cost estimation","prompt":"Before I bridge my 2000 USDC from Arbitrum to Base, can you check what the total bridge fees would be so I know what to expect?"},{"title":"Cheapest chain route comparison","prompt":"I want to move ETH to Optimism — can you get me the current bridge fee estimate so I can decide if it's worth doing now or waiting?"},{"title":"DeFi bot fee budgeting","prompt":"Get me the bridge fee estimate for transferring 10000 USDC from Ethereum to Base so my trading bot can calculate if the arbitrage is still profitable after fees."}],"resultDescription":"Returns a fee estimate for a cross-chain bridge transfer, typically including total fee amount, breakdown of gas costs vs protocol fees, and the token/chain context used for the calculation.","failureModes":["Unsupported source or destination chain returns an error or empty result","Invalid or unsupported token address causes a 400 error","Network congestion may cause stale or unavailable gas price data","Payment not received (402) if x402 payment header is missing or insufficient","Service downtime on Vercel deployment may cause 503 errors"],"whenToPreferThis":"Use this endpoint when you need a quick fee quote before initiating a cross-chain token bridge operation, particularly for routes involving Base chain. Prefer this over on-chain calls when you want a pre-computed estimate without requiring wallet connectivity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:39:16.921Z","isFirstParty":false,"canonicalSlug":"basebuilder-defi-bridge-fees-93d7b33f"}