Although the Search box widget functionality is no longer viable, users can deep link to individual title records using links constructed like those below:
ISBN: https://www.worldcat.org/isbn/#
ISSN: https://www.worldcat.org/issn/#
OCLC: https://www.worldcat.org/oclc/#
Title: https://www.worldcat.org/search?q=
If you need a logo for your search, we have a media kit that provides images.
At this time there is no widget functionality to help the user construct the searches, but if a library has a Discovery subscription, they can consider using the WorldCat Search API to recreate similar functionality.
Please note that due to the amount of records housed in WorldCat.org the result may not pull back the expected item: