# BaseBuilder DeFi Bridge Routes

> BaseBuilder DeFi Bridge Routes is a paid API for AI agents from bbx-defi.vercel.app, paid per call via x402, $0.168858/call, status unknown (last checked 2026-10-12).

Returns available cross-chain bridge routes for a given token transfer request in DeFi

## Facts

- Endpoint: POST https://bbx-defi.vercel.app/api/bridge/routes?utm_source=zero.xyz
- Price: $0.168858/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-defi-bridge-routes-58273702
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L8_dxD9ohQYyza2Ybpbm-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability basebuilder-defi-bridge-routes-58273702 -d '<json body>'
```

Example prompt: What bridge routes are available to transfer 500 USDC from Ethereum mainnet to Base chain?

## When to prefer this

Use this endpoint when an agent needs to discover available cross-chain bridge routes before executing a token transfer, especially when comparing multiple bridge protocols for cost or speed on Base-ecosystem chains. Prefer this over generic DEX aggregators when the use case is specifically cross-chain bridging rather than same-chain swaps.

## Known failure modes

- Unsupported chain pair returns empty routes array or error
- Invalid token address results in 400 or no routes found
- Amount too low or too high for available bridge liquidity
- Chain ID not recognized returns validation error
- Network congestion may cause stale or unavailable route data

## How this service works

BaseBuilder Defi API hub - 22 paid endpoints

## Output

A list of available bridge routes for the requested token transfer, including supported bridge protocols, estimated output amounts, fees, and estimated transfer times for each route option.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-defi-bridge-routes-58273702/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bbx-defi.vercel.app](https://www.zero.xyz/host/bbx-defi.vercel.app/llms.txt)