Access to preview APIs is generally restricted to developers who are part of the Microsoft Developer Program or the Microsoft 365 Developer Program. These programs offer early access to APIs, documentation, and other resources for developers who are building solutions for the Microsoft platform.
To gain access to the Teams Approval Graph API preview, you can follow these steps:
Join the Microsoft 365 Developer Program: This program provides access to a range of developer resources, including documentation, samples, and previews of upcoming APIs. You can sign up for the program at https://developer.microsoft.com/en-us/microsoft-365/dev-program.
Join the Microsoft Teams Developer Preview program: This program provides access to preview versions of Teams APIs, including the Teams Approval Graph API. You can sign up for the program at https://aka.ms/teamsdevpreview.
Review the Teams Approval Graph API documentation: Once you have access to the preview program, you can review the documentation for the Teams Approval Graph API at https://docs.microsoft.com/en-us/graph/api/resources/teamsapproval.
Keep in mind that preview APIs are subject to change, and any solutions built using preview APIs may need to be updated once the API is generally available. However, accessing preview APIs can help expedite the development process and ensure that your app is ready when the API is released.
As for other preview APIs, you can check the Microsoft 365 Developer Program website or the Microsoft 365 roadmap for information on upcoming APIs and previews.