curl -X POST "https://api.joinformal.com/core.v1.ConnectorService/ListConnectorInstances" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "example": "value"
  }'

{
  "instances": [
    {
      "instanceId": "<string>",
      "lastSeen": "2023-01-15T01:30:15.01Z",
      "startTime": "2023-01-15T01:30:15.01Z",
      "version": "<string>"
    }
  ],
  "listMetadata": {
    "after": "<string>",
    "before": "<string>",
    "count": 123,
    "nextCursor": "<string>"
  }
}