docs/samples/sync_request.xml

<request>
    <version>
        <protocol>1</protocol>
        <models>
            <post>1</post>
        </models>
    </version>
    <data>
        <type>sync</type>
        <timestamp>0</timestamp>
        <hosts>
            <allow>
                <host>*</host>
            </allow>
            <deny></deny>
            <pools>
                <pool>test1</pool>
                <pool>test2</pool>
            </pools>
        </hosts>
        <!-- Get only posts id to load posts later (maybe from several hosts) -->
        <id-only>true</id-only>
    </data>
</request>