API Key Config ist fertig

API_REFERENCE.md

@@ -1,5 +1,31 @@
 # V2-Docker API Reference
 
+## Authentication
+
+### API Key Authentication
+
+All License Server API endpoints require authentication using an API key. The API key must be included in the request headers.
+
+**Header Format:**
+```
+X-API-Key: AF-2025-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+```
+
+**API Key Management:**
+- API keys can be managed through the Admin Panel under Administration → API Keys
+- Keys follow the format: `AF-YYYY-[32 random characters]`
+- Only one system API key is active at a time
+- Regenerating the key will immediately invalidate the old key
+
+**Error Response (401 Unauthorized):**
+```json
+{
+  "error": "Invalid or missing API key",
+  "code": "INVALID_API_KEY",
+  "status": 401
+}
+```
+
 ## License Server API
 
 ### Public Endpoints
@@ -42,7 +68,8 @@ Activate a license on a new system.
 
 **Headers:**
 ```
-X-API-Key: your-api-key
+X-API-Key: AF-2025-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+Content-Type: application/json
 ```
 
 **Request:**
@@ -76,7 +103,8 @@ Verify an active license.
 
 **Headers:**
 ```
-X-API-Key: your-api-key
+X-API-Key: AF-2025-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+Content-Type: application/json
 ```
 
 **Request:**