> For the complete documentation index, see [llms.txt](https://docs.defguard.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.defguard.net/2.1/for-developers/rest-api/core/system/check-instance-health.md).

# Check instance health

```json
{"openapi":"3.1.0","info":{"title":"defguard Core API","version":"2.1.0"},"tags":[{"name":"system","description":"Health check, instance info and other utility endpoints."}],"paths":{"/api/v1/health":{"get":{"tags":["system"],"summary":"Check instance health","operationId":"health_check","responses":{"200":{"description":"Core is running.","content":{"text/plain":{"schema":{"type":"string"}}}}}}}}}
```