Explore best practices for designing and consuming public REST APIs in this comprehensive conference talk. Learn from real-world experiences at Huddle, covering topics such as initial API design, extensibility, versioning, async operations, rate limiting, deprecation handling, and backend for frontends. Discover strategies for maintaining a usable API while keeping clients happy, including tips on consuming APIs reliably, coping with changes, and understanding caching. Gain insights into common pitfalls and practical solutions for both API creators and consumers, addressing challenges in moving from monolithic applications to microservices-based architectures.