Email the Author

You can use this page to email Mike Amundsen about Handy API Extension Patterns.

About the Book

In this compact and practical guide, Mike Amundsen shares a proven design pattern for safely evolving API response payloads without triggering downstream failures. Starting with a clear look at strong, weak, and "mild" typing styles, the book introduces a resilient approach using structured extensions and runtime accessors that allow APIs to grow gracefully over time.

Whether you're maintaining legacy services or building future-facing systems, this book gives you the tools to design messages that are stable, flexible, and ready for change.

About the Author

Mike Amundsen

@mamund

An internationally known author and speaker, Mike Amundsen consults with organizations around the world on network architecture, Web development, and the intersection of technology & society. He works with companies large and small to help them capitalize on the opportunities provided by APIs, Microservices, and Digital Transformation.

Amundsen has authored numerous books and papers. His latest book is "Design and Build Great APIs" for Pragmatic Publishing. He also contributed to the O'Reilly book, "Continuous API Management" (2018). His "RESTful Web Clients", was published by O'Reilly in February 2017 and he co-authored "Microservice Architecture" (June 2016). Internationally known author and speaker Mike Amundsen consults with organizations around the world on network architecture, Web development, and the intersection of technology & society. He helps companies capitalize on the opportunities provided by APIs, Microservices, and Digital Transformation.

Amundsen has authored numerous books and papers. His most recent book is "RESTful Web API Patterns and Practices Cookbook" (2022). His "Design and Build Great APIs" (2020) is a popular developer-centric book. Amundsen also contributed to the book, "Continuous API Management" (2020, 2018). His "RESTful Web Clients", was published in February 2017 and he co-authored "Microservice Architecture" (June 2016).