The API Gateway Handbook
The API Gateway Handbook
Your Practical Guide to API Gateway Setup, Security, and Operation
About the Book
API Gateways sit at the center of modern API infrastructure. They secure access, control traffic, manage transformations, and bridge legacy systems with new architectures. Whether you're building microservices, exposing APIs to partners, or modernizing a monolith, the API Gateway is where everything comes together.
This book is your practical guide to designing, configuring, and operating API Gateways effectively. It covers key concepts like security, traffic control, OpenAPI validation, and deployment patterns, and offers real-world examples using the open source Membrane API Gateway.
The content is vendor-neutral at its core, making it valuable no matter which API Gateway technology you use. From JWT validation to orchestration with lightweight scripting, you’ll learn how to build secure, maintainable, and scalable API infrastructure.
About the Authors
Table of Contents
- Architecture and Design Patterns Where to place gateways, when to go central or decentralized, and how to scale effectively in production environments.
- Security and Protection Hands-on guidance for TLS termination, API key validation, JWTs, OAuth2/OIDC, and content filtering for JSON, XML, and GraphQL.
- Traffic Management Techniques for enforcing rate limits, preventing abuse, and protecting critical endpoints with smart traffic control.
- OpenAPI Integration Use OpenAPI definitions to validate traffic, automate deployments, and simplify CI/CD workflows.
- Message Transformation & Orchestration Enrich, reshape, and combine APIs using scripting, templates, and transformation pipelines.
- Legacy Integration Expose SOAP and WSDL-based services through modern APIs, complete with mocking, validation, and mapping examples.
- Deployment Scenarios Real-world setups using Docker, clustered gateways, internal vs. external topologies, and outbound gateways.
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