YikeSite supports XML-RPC through the MetaWeblog API. See the links in the sidebar for full documentation of supported methods and parameters, as well as examples.
The XML-RPC endpoint for YikeSite is specific for each page on the account. To view the endpoint for an individual page, login to the administration area and click the "Pages" tab. Select the page you want and click the "Settings" sub-tab. At the bottom, under the heading "API Details", the XML-RPC endpoint for the particular page will be shown.
Permissions set on a user by the account administrator will be respected when accessing the account through the XML-RPC API.