Simulate rate limits for any API and verify that your app won't break when it exceeds the API quota.

Without changing your code, in minutes, see how your app responds to slow APIs. Learn where to improve your app's UI to keep it responsive and deliver a great user experience to your customers.

Use Microsoft 365 Developer Proxy to mock n-th request, and more easily simulate scenarios that consist of several API requests.

Using the Microsoft Graph JavaScript SDK is a convenient way to connect your app to Microsoft 365. Here's how you can easily debug API requests issued from the SDK.

Building robust apps that use APIs doesn't have to be hard. There are tools that you can use to see for yourself how your app will behave when calling APIs that it uses fails.