Kong — Cloud-Native API and AI Gateway

What it is

Kong Gateway is a scalable, open-source API gateway and microservice proxy built on top of NGINX. It provides pluggable policy enforcement for authentication, rate limiting, observability, and AI traffic management. Kong sits between API consumers and your backend services, handling cross-cutting concerns centrally.

Kong targets platform teams and API architects who need a unified gateway for managing API traffic. It supports REST, GraphQL, gRPC, and WebSocket protocols, and can be deployed on Kubernetes, Docker, or bare metal.

How it saves time or tokens

Without an API gateway, each microservice implements its own authentication, rate limiting, and logging. Kong centralizes these concerns with a plugin architecture. Enable a plugin once and it applies to all routes. The AI gateway features route LLM traffic, manage API keys across providers, and apply rate limits per consumer, reducing the boilerplate in AI application backends.

How to use

1. Start Kong in DB-less mode:

docker run -d --name kong \
  -e KONG_DATABASE=off \
  -e KONG_DECLARATIVE_CONFIG=/kong.yml \
  -v $PWD/kong.yml:/kong.yml \
  -p 8000:8000 -p 8001:8001 \
  kong:latest

1. Add a service and route via the admin API:

curl -X POST http://localhost:8001/services \
  -d name=my-api -d url=http://backend:3000

curl -X POST http://localhost:8001/services/my-api/routes \
  -d 'paths[]=/api'

1. Enable plugins:

# Rate limiting
curl -X POST http://localhost:8001/services/my-api/plugins \
  -d name=rate-limiting -d config.minute=100

# API key authentication
curl -X POST http://localhost:8001/services/my-api/plugins \
  -d name=key-auth

Example

# kong.yml - Declarative configuration
_format_version: '3.0'
services:
  - name: my-api
    url: http://backend:3000
    routes:
      - name: api-route
        paths:
          - /api
    plugins:
      - name: rate-limiting
        config:
          minute: 100
          policy: local
      - name: key-auth
      - name: prometheus

Related on TokRepo

• AI Gateway Providers — Compare API gateway solutions for AI traffic
• AI Tools for API — API management and development tools

This tool integrates with standard development workflows and requires minimal configuration to get started. It is available as open-source software with documentation and community support through the official repository. The project follows semantic versioning for stable releases.

For teams evaluating this tool, the key advantage is reducing manual work in repetitive tasks. The automation provided by the built-in features means less custom code to maintain and fewer integration points to manage. This translates directly to lower maintenance costs and faster iteration cycles.

Common pitfalls

• DB-less mode is simpler but requires restarting Kong to apply config changes; use a database (PostgreSQL) for dynamic configuration via the admin API.
• The admin API (port 8001) should not be exposed to the public internet; restrict access with firewall rules or use Kong's admin API authentication.
• Plugin execution order matters for request processing; understand the plugin priority system when combining multiple plugins on the same route.