Microsoft Graph API

Social / OAuth Advanced HTTPS
Varies by plan (check documentation)

Overview

Microsoft Graph API is a unified gateway to data across Microsoft 365, including emails, calendars, files, and Teams messages. It uses OAuth 2.0 for authentication and returns JSON data, making it the standard way to integrate with Microsoft services. Beginners should start with the Graph Explorer at developer.microsoft.com to test calls without writing code.

💡

Beginner Tip

Use the Microsoft Graph Explorer (graph.microsoft.com/graph-explorer) to run live API calls with your own account — it handles authentication for you and shows you exactly what data you get back.

Available Data

Microsoft Graph data via REST API
JSON-formatted response data
Requires OAuth authentication

Example Response

JSON Response
{
  "status": "success",
  "data": {
    "result": "Data from Microsoft Graph",
    "description": "Access the data and intelligence in Microsoft 365, Windows 10, and Enterprise Mobility",
    "timestamp": "2025-01-15T10:00:00Z"
  }
}

Field Reference

id Unique identifier of the resource (user, group, message, etc.)
displayName Human-readable name of the resource
mail Primary email address of the user
@odata.context OData metadata URL describing the response format
value List of items returned in collection responses such as /me/messages or /me/calendarEvents

Implementation Example

const url = "https://docs.microsoft.com/en-us/graph/api/overview";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "Authorization": "Bearer YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

401 Unauthorized Access token is missing, expired, or lacks the required permission scope
Re-authenticate to get a fresh token and ensure your app registration includes the necessary Graph API permissions (e.g., User.Read)
403 Forbidden The token is valid but the app or user does not have the required permission
Add the missing permission scope in your Azure AD app registration and re-consent
404 Not Found The resource ID in the URL does not exist or you are using the wrong API version
Double-check the user ID, group ID, or file ID; try switching between /v1.0/ and /beta/ endpoints

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 15/20
🔒 Security 15/15
🛠 Developer XP 3/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth OAuth
HTTPS REQUIRED
CORS UNKNOWN
Category Social
Difficulty Advanced
Verified: 2026-04-07

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