There is “Go Daven”:
“The worldwide searchable database of Orthodox Minyan information, including minyan locations (Shuls), times, and contact information.”
Also, you can search on “Nedarim Plus” by Shul name or by clicking on the “זמני תפילות – ארצי” button and searching by map or name.
Of course, Minyanim are often dynamic and offline, and none of these tools are perfectly reliable.