> ## Documentation Index
> Fetch the complete documentation index at: https://developers.eyequant.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Check API status

> Verify your credentials and confirm the EyeQuant API is operational.

Check service availability and verify that your authentication credentials are correct. On success it returns a short confirmation message.

<Tip>
  Because this endpoint is lightweight and requires authentication, it is a convenient way to verify your API key — for example, in a CI pipeline or at the start of a batch job, before issuing analysis requests.
</Tip>

<ResponseField name="message" type="string">
  A human-readable confirmation that authentication succeeded and the service is operational.
</ResponseField>

<RequestExample>
  ```bash cURL theme={null}
  curl \
    -X GET \
    -H "Authorization: Bearer $apikey" \
    https://api.eyequant.com/v2/
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "message": "Welcome to the EyeQuant API. You have been authenticated successfully and the service is operational."
  }
  ```

  ```json 401 theme={null}
  {
    "error": {
      "code": "authentication_failed",
      "message": "We were unable to authenticate you. Please check your credentials."
    }
  }
  ```
</ResponseExample>