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

# Enable OTP for client

> Enable one-time password authentication for a client.

<Warning>
  **Deprecated.** This endpoint is no longer available in the public API and is kept for reference only.
</Warning>

Enables one-time password authentication for the specified client. Requires an API key with access level 3 or higher.

## Path parameters

<ParamField path="id" type="string" required>
  Unique identifier of the client.
</ParamField>

## Response

Returns the updated client. See [Get client by ID](/api-reference/management/clients/get-client) for the full field list.

<RequestExample>
  ```bash cURL theme={null}
  curl -X PATCH "https://api.cryptomate.me/management/clients/client_a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d/enable-otp" \
    -H "x-api-key: $CRYPTOMATE_API_KEY"
  ```
</RequestExample>

<ResponseExample>
  ```json 200 OK theme={null}
  {
    "id": "client_a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d",
    "otp": true
  }
  ```

  ```json 404 Not Found theme={null}
  {
    "code": "NOT_FOUND",
    "message": "Company client not found with id: client_a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d"
  }
  ```
</ResponseExample>