What are the types of Authentication that you use in HTTP API?

There are several types of Authentication commonly used in HTTP APIs to verify the identity of clients and protect access to resources:

API Key Authentication, while simple, requires robust security measures to prevent potential vulnerabilities. The client sends a unique key in the request header or as a query parameter, issued by the API provider and used to authenticate requests.

OAuth 2.0: A more secure and flexible method, OAuth 2.0 involves exchanging tokens (access tokens) to authenticate clients without sharing credentials. It is widely used for APIs like those from Google or Facebook.

Bearer Token Authentication: Similar to OAuth, the client includes a token in the "Authorization" header of the request. This token verifies the client's access rights to the API.

Basic Authentication: where the client sends the username and password encoded in Base64 in the HTTP header, is secure only when used over HTTPS. It's important to be aware of the security risks involved and take necessary precautions.

These methods offer varying levels of security depending on the application's needs.