# Common parameters

> Reference common parameters used in server-to-server API requests.

The following table details the parameters that are common to a majority of the Vivox Server to Server Web APIs.

| Parameter     | Description                                                     | Notes                                                                                                                                                                                                                                                                                                                                                     |
| ------------- | --------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| userid        | The Vivox username of the requester of the Vivox operation.     | Found in the VIVOX API INFO section on the Developer Portal.                                                                                                                                                                                                                                                                                              |
| pwd           | The password of the user identified by the userid parameter.    | Found in the VIVOX API INFO section on the Developer Portal.                                                                                                                                                                                                                                                                                              |
| auth\_token   | An explicit authorization token (cookie).                       | Found in the response from a successful viv\_signin.php call.
**Note**: The [Control active channels API](../control-active-channels-api/control-active-channels-api) and the [Kick API](../kick-api/kick-api) can each use the auth\_token parameter in place of the userid and pwd parameters. For more information, see [Login API](../login-api). |
| access\_token | The access token with proper claims for this action.            |                                                                                                                                                                                                                                                                                                                                                           |
| user\_uri     | The SIP URI of the user that is the target of the operation.    | This value must be URL-encoded when calling the API.                                                                                                                                                                                                                                                                                                      |
| chan\_uri     | The SIP URI of the channel that is the target of the operation. | This value must be URL-encoded when calling the API.                                                                                                                                                                                                                                                                                                      |

> **Note:**
>
> Ensure that the `user_uri` and `chan_uri` parameters are [fully qualified identifiers](./fully-qualified-identifiers.md).