> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/sdks/backend-sdk/backend1n/technical_documentation/api_reference/management/health.md).

# /health

Checks whether the service is active.

```json
{"openapi":"3.0.1","info":{"title":"Backend1n-Service REST API","version":"5.0.0"},"servers":[{"url":"http://127.0.0.1:6982/"}],"security":[],"paths":{"/health":{"get":{"description":"Checks whether the service is active.","tags":["Management"],"responses":{"200":{"description":"A message with the health status.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/HealthResult"}}}},"500":{"description":"An error occurred in the Backend1N service.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ExceptionResult"}}}}}}}},"components":{"schemas":{"HealthResult":{"type":"object","description":"The result of a health check.","properties":{"message":{"$ref":"#/components/schemas/HealthStatus"},"initialized":{"type":"boolean","description":"Whether the SDK started correctly when the service started."},"sdk":{"$ref":"#/components/schemas/HealthSdkState"}}},"HealthStatus":{"type":"string","description":"Result of the health service (indicates whether the SDK is active or not).","enum":["Healthy","Unhealthy"]},"HealthSdkState":{"type":"object","description":"State of the biometric SDK.","properties":{"healthy":{"type":"boolean"},"initialized":{"type":"boolean"},"lastError":{"type":"string","description":"Reason for the last unhealthy state. Empty string if there is none."},"lastHealthCheckAt":{"$ref":"#/components/schemas/TimeStamp"},"lastHealthKnown":{"type":"boolean"},"lastInitStatus":{"type":"string"}}},"TimeStamp":{"type":"string","description":"A date/time value (UTC) in \"%Y-%m-%dT%H:%M:%SZ\" format."},"ExceptionResult":{"type":"object","description":"An error occurred while calling the backend services.","properties":{"status":{"type":"number"},"error":{"type":"string"},"exception":{"type":"string","description":"Specific description of the reason for the exception (internal service text; it is not part of the contract)."},"timeStamp":{"$ref":"#/components/schemas/TimeStamp"}}}}}}
```