GraphQL, an alternative to traditional REST APIs, has been gaining popularity. It allows clients to request only the data they need, leading to more efficient and flexible API queries.

Real-time APIs, often implemented with technologies like WebSockets and server-sent events (SSE), have gained traction to support live updates and push notifications.

gRPC Remote Procedure Calls is gaining popularity as an efficient and high-performance communication protocol, especially for microservices architectures.

Event-driven architectures are being adopted more widely, with APIs emitting events to notify clients of changes or actions, enabling real-time updates and better integration.