1# Health Check Endpoint
2 
3> **RECOMMENDED**: Add a health endpoint for monitoring and load balancer probes.
4 
5## Python
6 
7```python
8@app.route(route="health", methods=["GET"], auth_level=func.AuthLevel.ANONYMOUS)
9def health(req: func.HttpRequest) -> func.HttpResponse:
10    return func.HttpResponse(
11        '{"status":"healthy"}',
12        mimetype="application/json",
13        status_code=200
14    )
15```
16 
17## TypeScript
18 
19```typescript
20import { app, HttpRequest, HttpResponseInit, InvocationContext } from '@azure/functions';
21 
22app.http('health', {
23    methods: ['GET'],
24    authLevel: 'anonymous',
25    handler: async (request: HttpRequest, context: InvocationContext): Promise<HttpResponseInit> => {
26        return {
27            status: 200,
28            jsonBody: { status: 'healthy' }
29        };
30    }
31});
32```
33 
34## JavaScript
35 
36```javascript
37const { app } = require('@azure/functions');
38 
39app.http('health', {
40    methods: ['GET'],
41    authLevel: 'anonymous',
42    handler: async () => ({
43        status: 200,
44        jsonBody: { status: 'healthy' }
45    })
46});
47```
48 
49## C# (.NET)
50 
51```csharp
52public class Health
53{
54    [Function("health")]
55    public HttpResponseData Run(
56        [HttpTrigger(AuthorizationLevel.Anonymous, "get")] HttpRequestData req)
57    {
58        var response = req.CreateResponse();
59        response.Headers.Add("Content-Type", "application/json");
60        response.WriteString("{\"status\":\"healthy\"}");
61        return response;
62    }
63}
64```
65 
66## Java
67 
68```java
69@FunctionName("health")
70public HttpResponseMessage health(
71        @HttpTrigger(name = "req", methods = {HttpMethod.GET}, authLevel = AuthorizationLevel.ANONYMOUS)
72        HttpRequestMessage<Optional<String>> request,
73        final ExecutionContext context) {
74    
75    return request.createResponseBuilder(HttpStatus.OK)
76            .header("Content-Type", "application/json")
77            .body("{\"status\":\"healthy\"}")
78            .build();
79}
80```
81 
82## PowerShell
83 
84**health/function.json:**
85```json
86{
87  "bindings": [
88    {
89      "authLevel": "anonymous",
90      "type": "httpTrigger",
91      "direction": "in",
92      "name": "Request",
93      "methods": ["get"]
94    },
95    {
96      "type": "http",
97      "direction": "out",
98      "name": "Response"
99    }
100  ]
101}
102```
103 
104**health/run.ps1:**
105```powershell
106param($Request, $TriggerMetadata)
107 
108Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
109    StatusCode = [HttpStatusCode]::OK
110    Body = '{"status":"healthy"}'
111    ContentType = 'application/json'
112})
113```
114 
115## Usage Notes
116 
117- **Auth level**: Use `anonymous` for load balancer probes
118- **Response**: Return JSON with at least `{"status":"healthy"}`
119- **Extended checks**: Can add database connectivity, dependency checks
120- **Route**: Standard route is `/api/health`
121