API Gateway

The API Gateway provides enterprise-grade traffic management for your entire API ecosystem. Handle REST, Kafka, WebSocket, MQTT, and beyond with full governance and control.

Key Features

• Multi-Protocol Support - REST, WebSocket, MQTT, Kafka, and more
• Intelligent Routing - Path-based (prefix, exact, regex) and method-based routing
• Load Balancing - Round-robin, weighted, IP-hash, least-connections
• Rate Limiting - Per-route and global rate limiting
• Health Checks - Automatic backend monitoring and failover
• Request Transformation - Modify headers, query params, and paths
• Circuit Breaker - Automatic failure detection and recovery

Creating a Gateway

Via Web UI

1. Navigate to Gateways in the sidebar
2. Click Create Gateway
3. Enter:
   • Name: Descriptive name for your gateway
   • Subdomain: URL prefix (e.g., myapi → myapi-gw.free-tunnelapi.app)
   • Description: Optional description

Via API

curl -X POST https://api.tunnelapi.in/api/gateways \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My API Gateway",
    "subdomain": "myapi",
    "description": "Production API gateway"
  }'

Managing Routes

Routes define how incoming requests are matched and forwarded to backends.

{
  "name": "API Route",
  "path": "/api/v1",
  "pathType": "prefix",        // prefix, exact, regex
  "methods": ["GET", "POST"],
  "backends": [
    {
      "url": "http://backend1:3000",
      "weight": 70,
      "healthCheck": {
        "enabled": true,
        "path": "/health",
        "interval": 30000
      }
    },
    {
      "url": "http://backend2:3000",
      "weight": 30
    }
  ],
  "loadBalancing": {
    "strategy": "weighted"
  }
}

Path Types

Type	Behavior	Example
prefix	Matches path prefix	/api matches /api, /api/users
exact	Exact path match	/api matches only /api
regex	Regular expression	/api/v[0-9]+

Rate Limiting

Configure rate limits per gateway or per route:

{
  "rateLimit": {
    "enabled": true,
    "requestsPerSecond": 100,
    "burstSize": 150
  }
}

Request Transformation

Transform requests before forwarding:

{
  "transformations": {
    "addHeaders": {
      "X-Gateway-ID": "{{gateway.id}}",
      "X-Request-ID": "{{uuid}}"
    },
    "removeHeaders": ["X-Internal-Header"],
    "modifyHeaders": {
      "Host": "internal-service.local"
    }
  }
}

Analytics

Monitor your gateway traffic:

• Request Count - Total requests processed
• Bytes In/Out - Bandwidth usage
• Error Count - Failed requests
• Average Latency - Response time