Explore modern API technologies beyond REST in this conference talk from Spring I/O 2022. Delve into alternatives like GraphQL, gRPC, and RSocket, understanding their pros and cons compared to REST APIs. Learn about their maturity, Spring and Spring Boot support, and see code examples and live demonstrations. Discover how these technologies address REST limitations, handle efficient data packaging, and implement features like subscriptions and bidirectional communication. Gain insights into integrating GraphQL APIs with existing applications, implementing gRPC servers, and leveraging Spring's support for annotated handlers in RSocket. Conclude with key takeaways and guiding questions to help evaluate these alternatives for your API development needs.