What network services have you worked with? API, gRPC, and anything else?

In working with network services, I used several technologies:

• REST API — interaction via HTTP using JSON or other formats. Often used for microservice integration.
• gRPC — high-performance remote procedure call protocol based on HTTP/2 and protobuf. Used for low-latency and strictly typed services.
• WebSocket — for bidirectional real-time communication, such as in chats or monitoring systems.
• MQTT — a protocol for message exchange in IoT and distributed systems.

Each of these services is suitable for different tasks: REST is convenient and widely used, gRPC is efficient for internal high-load services, WebSocket is for interactive applications.