# API Gateway

> API Gateway — Kong, Traefik, Patterns

- Skill: `thebeardedbearsas/api-gateway` (Agent Skill)
- Install (CLI): `npx skillmds@latest add thebeardedbearsas/api-gateway`
- Raw SKILL.md: https://api.skillmd.com/api/skills/thebeardedbearsas/api-gateway/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: TheBeardedBearSAS (https://skillmd.com/u/thebeardedbearsas)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/thebeardedbearsas/api-gateway

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# API Gateway — Kong, Traefik, Patterns

API Gateway moderne pour routing, auth, rate limiting, observabilité.

## Responsabilités

| Fonction | Outils |
|----------|--------|
| **Routing** (path, header, canary) | Kong, Traefik, Nginx |
| **Auth** (JWT, OAuth2, API keys) | Kong plugins, Traefik middleware |
| **Rate Limiting** (per-user/IP) | Redis-backed counters |
| **Load Balancing** | HAProxy, Traefik |
| **Circuit Breaker** | Resilience4j, Istio |

## Stacks

**Kong** — Enterprise, plugins riches, K8s-native  
**Traefik** — Cloud-native, auto-discovery  
**AWS API Gateway** — Managed, serverless  
**Nginx** — Performance max, self-hosted  
**Envoy** — Service mesh (Istio), gRPC

## Kong Config

```yaml
services:
  - name: payment-api
    url: http://payment:8080
    routes: [{ paths: ["/api/payments"] }]
    plugins: [rate-limiting, jwt, prometheus]
```

## Traefik Config

```yaml
http:
  routers:
    payment:
      rule: "PathPrefix(`/api/payments`)"
      middlewares: [rate-limit, auth]
  middlewares:
    rate-limit:
      rateLimit: { average: 100, burst: 50 }
```

## Rate Limiting Algorithms

**Fixed Window** — Simple counter, bursty  
**Sliding Window** — Rolling counter, lissé  
**Token Bucket** — Flexible, burst toléré  
**Leaky Bucket** — Output constant, strict

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Pour setup : `@devops-engineer`