What are the Protocols Used in API Testing?

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Protocols used in API testing are:

  • HTTP
  • REST
  • SOAP
  • JMS
  • UDDI

API testing involves interacting with web services and APIs, and it can use various protocols. The most common protocols used in API testing include:

  1. HTTP/HTTPS: Most APIs are built on top of the HTTP or HTTPS protocol. This is the foundation for communication between the client and server.
  2. REST (Representational State Transfer): REST is an architectural style that uses a set of constraints when building web services. It often uses HTTP for communication and is widely used in API development.
  3. SOAP (Simple Object Access Protocol): SOAP is a protocol for exchanging structured information in web services. It uses XML for message formatting and can be carried over various protocols, including HTTP and SMTP.
  4. GraphQL: GraphQL is a query language and runtime for APIs that allows clients to request only the data they need. It is an alternative to REST and is gaining popularity.
  5. WebSocket: While not as common as HTTP-based protocols, WebSocket is used in some APIs for real-time communication. It provides a full-duplex communication channel over a single, long-lived connection.

When answering a question about the protocols used in API testing, it’s advisable to mention these commonly used protocols based on the context of the APIs being tested.