The API Gateway Handbook

📘 Pre-Release Now Available

The API Gateway Book is now available as a pre-release PDF.

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Why This Book?

API Gateways are critical components in modern software architecture. Whether you're working with microservices, securing APIs, or managing traffic at scale, this book offers a hands-on guide built on years of practical experience and open source development.

✅ What’s Included

• Part I: Concepts and Best Practices
  A vendor-neutral overview of API Gateway fundamentals: routing, transformation, rate limiting, OpenAPI validation, and modern security patterns like JWT and OAuth2.
• Part II: Practical Membrane Examples
  Step-by-step examples using the open source Membrane API Gateway — from proxy setup and scripting with Groovy to advanced orchestration and load balancing.
• OpenAPI Integration
  Configure request/response validation, rewrite API definitions, and plug OpenAPI into your CI/CD pipelines.
• Security Features
  TLS termination, API key handling, introspection, and rate limiting — everything you need to protect your services.
• Traffic Control
  Techniques for enforcing fair use: token bucket limiting, distributed counters, hash-based routing, and fallback strategies.
• API Orchestration and Enrichment
  Combine, enrich, or transform API responses with scripting and flexible interceptors.
• Real-World Deployment Scenarios
  Practical guides for running API Gateways in Docker, connecting with OpenID providers, and modernizing legacy systems.

Who Should Read It?

Software developers, architects, DevOps engineers, and product managers working with APIs who want to understand, setup, and operate API Gateways effectively.