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BaseBuilder DeFi Bridge Fees
x402
BaseBuilder DeFi Bridge Fees is a paid API for AI agents from bb-defi.vercel.app, paid per call via x402, $0.122869/call, status unknown (last checked 2026-09-14).
Calculates cross-chain bridge fees for DeFi token transfers via the BaseBuilder DeFi API hub
Price / call$0.122869
Success—
StatusUnknown
How this service works
BaseBuilder Defi API hub - 22 paid endpoints
Output
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.
Example use cases
Example prompt
“What would the bridge fees be to move 500 USDC from Ethereum mainnet to Base chain right now?”
Technical details
Endpoint
POSThttps://bb-defi.vercel.app/api/bridge/feesWhen to prefer
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.
Side effects
- 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
Tags
x402
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