WIPO-able domains? If you mean what domain names can be filed under UDRP, then the link below gives you a few answers: http://www.icann.org/udrp/#udrp However, WIPO also tries to resolve disputes for certain ccTLDs: http://www.wipo.int/amc/en/domains/cctld/index.html
While there's no single tool on earth that'll authoritatively search for any TMs online for a given term, you've got google, databases like uspto.gov, etc.