The free, third-party Postman GUI application allows you to test API requests and see examples before you add the API to your development environment.
Use Postman to test your credentials, send requests, and see responses. The online help provides instructions to set up your Postman collection.
Follow the OAuth-based authorization procedure to request an access token, and then provide that access token with every call.
Review the documentation to make sure you build your API requests correctly.
Download reference files, Swagger files, and/or schema files for the APIs.
After you have everything set up, start building out some API transactions to test the functionality.
