Request Packet Structure and Samples
A request XML packet retrieving information on server and Plesk configuration contains the get operation node:
<packet>
    <server>
        <get>
            ...
        </get>
    </server>
</packet>
The get node is presented by complex type getType
(server_input.xsd) and structured as follows:

Note: The interactive schema navigator for all request packets is available here: http://plesk.github.io/api-schemas/1.6.9.1/agent_input.svg.
- The key node is optional. It retrieves Plesk license key. Data
type: none (common.xsd).
- The gen_info node is optional. It retrieves general server
information which is now presented by the server name. Data type:
none (common.xsd).
- The components node is optional. It retrieves software
components installed on the server and managed by Plesk. Data type:
none (common.xsd).
- The stat node is optional. It retrieves Plesk and OS versions,
and statistics on the server resources usage and Plesk logical
objects. Data type: none (common.xsd).
- The admin node is optional. It retrieves Plesk Administrator’s
personal information and settings. Data type: none
(common.xsd).
- The interfaces node is optional. It retrieves network
interfaces supported by the server. Data type: none
(common.xsd).
- The services_state node is optional. It retrieves current state
of the server services, such as DNS service, FTP service, Mail
service, Fail2Ban, and so on. Data type: none (common.xsd).
- The prefs node is optional. It retrieves such server
preferences as settings of traffic usage statistics and apache
restart interval. Data type: none (common.xsd).
- The shells node is optional. It retrieves shells installed on
the server and available for choice when configuring a site’s
physical hosting. Data type: none (common.xsd).
- The session_setup node is optional. It retrieves session idle
time, namely, the amount of time a session with Plesk should stay
valid when no actions are performed. Data type: none
(common.xsd).
- The site-isolation-config node is optional. It retrieves the the
server-wide site isolation settings. Data type: none
(common.xsd).
- The updates node is optional. It retrieves the information
about installed and available Plesk updates, missed security updates,
and Plesk update policy. Data type: none (common.xsd).
- The admin-domain-list node is optional. It retrieves the
information about all domains, addon domains, subdomains, and domain
aliases created on the administrator’s subscriptions. Data type:
none (common.xsd).
- The certificates node is optional. It retrieves the information
about the SSL/TLS certificates used for securing Plesk and mail
server. Data type: none (common.xsd).
To retrieve specific server information, include the corresponding child nodes to your request. For example, to retrieve currently installed components and license key, send the following request packet:
<packet>
    <server>
        <get>
            <key/>
            <components/>
        </get>
    </server>
</packet>
To retrieve server general information, statistics and preferences, send the following request packet:
<packet>
    <server>
        <get>
            <gen_info/>
            <stat/>
            <prefs/>
        </get>
    </server>
</packet>
To retrieve the list of administrator’s domains, send the following request packet:
<packet>
    <server>
        <get>
            <admin-domain-list/>
        </get>
    </server>
</packet>
To retrieve the list of the SSL/TLS certificates used for securing Plesk and mail server, send the following request packet:
<packet>
    <server>
        <get>
            <certificates/>
        </get>
    </server>
</packet>
To retrieve the server settings in the site isolation mode:
<packet>
    <server>
        <get>
            <site-isolation-config/>
        </get>
    </server>
</packet>