API Gateway is a server that acts as a single entry point for API requests, handling authentication, rate limiting, routing, and other cross-cutting concerns.
API Gateway
API Gateway is a server that acts as a single entry point for API requests, handling authentication, rate limiting, routing, and other cross-cutting concerns.
Why It Matters
API gateways centralize security controls, reducing the attack surface. However, most gateways authenticate users — not individual API keys. They don't solve the problem of multiple people sharing the same upstream API key.
How It Works
The gateway sits between clients and backend services. It authenticates requests, applies rate limits, routes to the appropriate service, transforms requests/responses, and logs traffic. Popular gateways include Kong, AWS API Gateway, and Apigee.
Best Practices
- Use the gateway for authentication and rate limiting
- Don't embed business logic in the gateway
- Monitor gateway health as it's a critical path
- Use gateway logs for security monitoring
Common Mistakes
- Putting too much business logic in the gateway
- Not monitoring gateway latency and availability
- Using the gateway for user auth but ignoring API key management
How ShieldKey Helps
ShieldKey works alongside your API gateway. While the gateway handles routing and user authentication, ShieldKey manages the upstream API keys your services depend on — with encryption, access control, and per-token enforcement.
Try ShieldKey FreeFAQ
Is ShieldKey an API gateway?
ShieldKey is not a general API gateway — it's a specialized API key security proxy. It focuses on protecting upstream API keys with encryption, access control, and instant revocation.