curl --request GET \
  --url https://api.chainrails.io/api/v1/router/supported-routes/bridge/{bridge} \
  --header 'Authorization: Bearer <token>'

{
  "supportedRoutes": [
    {
      "sourceChain": "BASE_TESTNET",
      "destinationChain": "ARBITRUM_TESTNET",
      "supported": true,
      "bidirectional": true
    }
  ],
  "bridgeInfo": {
    "bridge": "ACROSS",
    "routeCount": 12
  }
}