Postman in the popular API development tool. RESTful Workshop recommends this tool when exploring the RESTful API Engine. The engine is an integral part of applications created with Code On Time. It supports authentication with API Key and OAuth 2.0 Authorization Code flows. It relies on access tokens to identify the users when client apps are making requests to the RESTful API.
Postman makes it easy to acquire an access token with OAuth 2.0 Authorization Code flow with PKCE.
Learn to configure Postman for authorization with the OAuth 2.0 server built into your application.