Dynamics 365 Business Central - OAuth 2.0 APIs with Insomnia

Dynamics 365 ERP - Development

Check out the article from Yun Zhu on setting up an app registration in Entra for using OAuth to connect Business Central APIs and Web Service in Postman.
Visit the Insomnia platform, create a free account/login, and download the desktop app for collaborative API development.
Create a new project in Insomnia with Local Vault for credentials or a Cloud Sync project for collaboration.
Enter the URL of the API you want to test out, such as the example API endpoint for getting the list of companies from your environment.
Add the HTTP request URL into the designated box and update the Auth tab with the Auth URL, Access URL, Client ID, and Client Secret.
Include the BC redirect URL in Azure, which is necessary for the authentication process.
Access the Endpoints in the App registration Overview in Azure to obtain the Authorization URL and Token Access URL required for the HTTP request.
Fetch the OAuth token by scrolling down on the Auth tab, clicking Fetch, and completing the login process to receive the Access Token. Send the HTTP request to receive results, with a response of 200 indicating success.

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