sharepoint is some kind of brandname, I'd try to find out what kind of protocols it uses, then hit up MetaCPAN and CPAN

This may be of interest (its all there is, very little)
using perl to read in details from a sharepoint site
Access sharepoint calendar using LWP
to get file names and timestamps from sharepoint
Sharepoint Automation?
Accessing SharePoint via SOAP
Perl Script integration with Microsoft Sharepoint
SharePoint::SOAPHandler - Perl extension for providing a Sharepoint connecter instance for CopyTree::VendorProof.
XML::Compile::SOAP/http://perl.overmeer.net/xml-compile/#doc , see my treasure trove of soap examples and lost knowledge,$soap->transport->add_handler("request_send", \&pp_dump );, http://cookbook.soaplite.com/, SOAP endpoint , Re^3: SOAP::Lite login setup, Re: I do not understand how to write a SOAP server., An XML Overview Towards Understanding SOAP, Re^3: SOAP::Lite and custom envelopes, The XML FIles: Understanding XML Namespaces, How to Call a .NET-based Web Service Using the SOAP::Lite Perl Library (don't use XML::Compile )]