An online resource for testing the application's API?

Question

API

Tell me if there are online resources where you can test the API of the application before it is written.
For example, an API endpoint is issued to you and, for example, you can see what the application sent to the specified address by Post request?

Answer 1

Ok Google, show me the fake api endpoint.
https://www.google.ru/search?q=fake+api+endpoint

Answer 2

Runscope Also postman
, but this is software, not an online service

Answer 3

Install json-server and see :)

Answer 4

www.jsontest.com