# Send synchronizer heartbeat

Report synchronizer health and metrics

Endpoint: POST /auth/synchronizer/heartbeat
Version: 1.0
Security: bearer

## Request fields (application/json):

  - `deviceId` (string, required)
    Device identifier
    Example: "DEVICE-ABC-123"

  - `siteId` (number, required)
    Site ID
    Example: 1

  - `status` (string, required)
    Synchronizer status
    Enum: "healthy", "degraded", "error"

  - `lastSyncTime` (string)
    Last successful sync time

  - `errorCount` (number)
    Number of errors in current session

  - `metrics` (object)
    Additional metrics


## Response 200 fields

## Response 401 fields

## Response 409 fields