Can you name the main protocols used for data exchange between web services?

Main protocols for data exchange between web services:

• HTTP/HTTPS — the basic data transfer protocol on the web, used for REST API.
• SOAP — a protocol for exchanging structured messages, often over HTTP.
• WebSocket — a protocol for bidirectional real-time data exchange.
• gRPC — a modern remote procedure call protocol using HTTP/2 and Protocol Buffers.

For example, REST API typically operates over HTTP and uses JSON or XML formats for data transfer.