In ENDNOTE 2025, on the desktop version (windows) on the left Panel at the bottom, there is a section for “Online Search.” These are currently in the list for online search:
Jisc Library Hub Discovery
Library of Congress
PubMed (NLM)
Web of Science Core Collection
Is there a way to add “Google Scholar” to the list of online search tools?
Thank you for your help with this.
I read :
and thought, “all over it? Really?” then I saw that the answer was from 17 YEARS ago and repeated 12 YEARS ago. Sadly, I have found they put as much into maintenance of this as they do other aspects of Endnote. There are no emails when they update, or correct, the connections list. That said you can find the current set, individually and as a group download https://endnote.com/downloads/connections/
When I find a broken link, I have found the fastest way of doing it is t fix it myself. A few years ago got quite good at editing and creating the connection files. In several cases I had to contact the libraries concerned, who were usually very helpful. However, these were “proper” libraries, with real librarians. Not part of a huge multinational with no easy way of contacting a human who can do something.
I can’t imagine it would be difficult for Google to add a z39.50 interface, but why would they when you can “google it”. They are the standard… 
That aside, it is well worth learning how to use the Ednnote connection manager. Unfortunately, I believe there is a new system on the way. Though it will be a long while before anyone drops the z39.50 system (I hope) because I won’t be moving to the new system with Endnote.