In which type of request would you use 'X-Auth-Token' for authentication?

The 'X-Auth-Token' is a common method used for authentication in many APIs, particularly those that follow REST architecture. This token is typically included in the header of the HTTP requests to authorize access to endpoints.

When it comes to the types of requests — GET, POST, or PUT — using the 'X-Auth-Token' is not limited to just one specific type. All these request methods can require the token, as they may be interacting with protected resources on a server.

For a GET request, the token is used to retrieve data securely, ensuring that only authenticated users have access. In the case of a POST request, the token helps authenticate the data being sent to the server, such as when creating or updating resources. Similarly, a PUT request, which often updates an existing resource, also uses the token to confirm that the request comes from an authenticated source.

This capability across different types of requests illustrates the flexibility and importance of the 'X-Auth-Token' for maintaining secure interactions in an API environment. Hence, the use of 'X-Auth-Token' for authentication applies to all mentioned request types.