# Bridge Routes API

> Bridge Routes API is a paid API for AI agents from bridge-routes.api.klymax402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Find the optimal cross-chain bridge route for transferring tokens between EVM-compatible blockchains

## Facts

- Endpoint: GET https://bridge-routes.api.klymax402.com/api/route
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bridge-routes-api-be67b91f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jBxp0mcoqlV65lX4nD0iD

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 bridge-routes-api-be67b91f
```

Example prompt: What's the best bridge route to move 1000 USDC (that's 1000000 in smallest units) from Base (chain 8453) to Arbitrum (chain 42161)?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically determine the best bridge route for a cross-chain token transfer across major EVM networks (Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Avalanche). Prefer this over manual research when automating DeFi workflows that require moving assets between chains.

## Known failure modes

- Unsupported chain ID returns error or empty route
- Invalid token symbol not supported on specified chain
- Amount too small or too large for available bridge liquidity
- No available route between specified chain pair for the given token
- Missing required query parameters returns validation error

## How this service works

Find the best cross-chain bridge route (POST variant)

## Output

Returns the optimal cross-chain bridge route including recommended bridge provider, estimated fees, expected output amount, and routing details for the specified token transfer between the two chains.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "fromChain",
      "toChain",
      "token",
      "amount"
     ],
     "properties": {
      "token": {
       "type": "string",
       "description": "Token symbol to bridge (e.g. USDC, USDT, ETH, WETH)"
      },
      "amount": {
       "type": "string",
       "description": "Amount in smallest unit (e.g. 1000000 for 1 USDC with 6 decimals, 1000000000000000000 for 1 ETH)"
      },
      "toChain": {
       "type": "string",
       "description": "Destination chain ID (1=Ethereum, 8453=Base, 42161=Arbitrum, 10=Optimism, 137=Polygon, 56=BSC, 43114=Avalanche)"
      },
      "toToken": {
       "type": "string",
       "description": "Destination token symbol if different from source (optional, defaults to same as token)"
      },
      "fromChain": {
       "type": "string",
       "description": "Source chain ID (1=Ethereum, 8453=Base, 42161=Arbitrum, 10=Optimism, 137=Polygon, 56=BSC, 43114=Avalanche)"
      }
     }
    }
   },
   "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/bridge-routes-api-be67b91f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bridge-routes.api.klymax402.com](https://www.zero.xyz/host/bridge-routes.api.klymax402.com/llms.txt)