The main URL for Yahoo is https://www.yahoo.com/、This is the homepage for Yahoo, and from here, you can access various Yahoo services such as:

* Search: https://search.yahoo.com/
* Mail: https://mail.yahoo.com/
* Finance: https://finance.yahoo.com/
* News: https://news.yahoo.com/
* Sports: https://sports.yahoo.com/
* Entertainment: https://www.yahoo.com/entertainment
* and many more!

If you're looking for a specific Yahoo service or feature, feel free to let me know and I can try to provide the corresponding URL!