Suggest Some Features and Things for my app(it's an API/HTTP Client)

Hello, I am creating an API Client
I've Added:

  • Get
  • Post (that also takes a body in [json, html, javascript, text])
  • Put (same as post content-types)
  • Displaying the output data from request
    • Data from the request
    • Errors (404)

Does anyone else have any good ideas to add?

App Link