# Cross-Chain Bridge Route

> Cross-Chain Bridge Route is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).

Returns the best cross-chain token bridge route via LiFi aggregator, including which bridge to use, estimated received amount, transfer time, fees, and a ready-to-send transaction.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/bridge-route?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cross-chain-bridge-route-9ab76dba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YeQC-UJx2KdYIBe7RDajC

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 cross-chain-bridge-route-9ab76dba
```

Example prompt: What's the best route to bridge 500 USDC from Ethereum to Arbitrum? Give me the fees, estimated arrival amount, and a ready-to-send transaction using my wallet 0xAbCd...1234.

## When to prefer this

Use this endpoint when an agent needs to route a cross-chain token transfer across Ethereum, Base, Arbitrum, Optimism, or Polygon and wants a single aggregated best-route answer (bridge selection, fees, received amount, and a ready transaction) rather than querying multiple bridge UIs manually. Prefer this over generic DeFi routing when the goal is specifically cross-chain bridging, not same-chain swaps.

## Known failure modes

- Unsupported chain pair — only ethereum, base, arbitrum, optimism, polygon are supported
- Unsupported token symbol — only USDC, USDT, ETH, WETH, DAI or valid 0x contract addresses accepted
- Amount too small — may fail if below minimum bridge threshold for the selected route
- No route found — LiFi aggregator finds no viable bridge path for the given pair and amount
- Missing required parameters (from, to, amount) — returns 400 error
- Stale quote — fees/amounts may change between quote and execution; always re-quote before sending

## How this service works

Agents bridge across chains and get it wrong — bad route, an untrusted bridge, fees that eat the transfer. Returns the best cross-chain route via the LiFi aggregator: which bridge, how much arrives, est. time, gas + bridge fees in USD, and the ready-to-send tx. Chains: ethereum, base, arbitrum, optimism, polygon. Tokens by symbol (USDC/USDT/ETH/WETH/DAI) or a 0x address + amountUnits. A quote — re-quote with your own sender before executing; we never hold keys. Not financial advice.

## Output

Returns the optimal bridge route including: the recommended bridge protocol (via LiFi aggregation), estimated amount received on the destination chain, estimated transfer time, gas fees and bridge fees in USD, and a ready-to-send transaction object. This is a quote only — the caller must re-quote with their own sender address before executing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "from",
      "to",
      "amount"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "To chain"
      },
      "from": {
       "type": "string",
       "description": "From chain"
      },
      "token": {
       "type": "string",
       "description": "Token symbol (default USDC)"
      },
      "amount": {
       "type": "string",
       "description": "Amount to bridge"
      },
      "fromAddress": {
       "type": "string",
       "description": "Your wallet (optional, for a ready tx)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cross-chain-bridge-route-9ab76dba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)