Welcome to the API Documentation
Explore the comprehensive collection of APIs available to build powerful applications. This portal provides detailed guides, reference materials, and code examples for a wide range of technologies.
Featured API Categories
Web APIs
Discover APIs for building modern web applications, including RESTful services, real-time communication, and browser features.
View Web APIsWindows APIs
Access core functionalities of the Windows operating system for desktop, UWP, and other Windows applications.
View Windows APIsAzure APIs
Integrate with Microsoft's cloud platform. Leverage services for computing, storage, databases, AI, and more.
View Azure APIs.NET APIs
Documentation for the .NET framework and .NET Core, covering a vast array of libraries and classes.
View .NET APIsGetting Started with an API
To begin using an API, select a category above, then choose a specific API to view its documentation. Each API page typically includes:
- Overview and purpose
- Endpoints and request/response formats
- Authentication methods
- Code examples in various languages
- Error handling information
Example: A Simple REST API Call
Here's a basic example of how you might call a hypothetical REST API using JavaScript's `fetch` API:
const fetchUserData = async (userId) => {
const url = `https://api.example.com/users/${userId}`;
try {
const response = await fetch(url, {
method: 'GET',
headers: {
'Accept': 'application/json',
'Authorization': `Bearer YOUR_ACCESS_TOKEN`
}
});
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const userData = await response.json();
console.log(userData);
return userData;
} catch (error) {
console.error('Error fetching user data:', error);
}
}
// Example usage:
fetchUserData(123);