@jay
If you are using NoSQL API then you can find Endpoint under the settings select keys shown below.
the URI is the endpoint, and you can either use the Primary or Secondary key. Those are read-write keys, there are read-only keys too.
for Mongo API you can find the same in the connection string under the settings more details please refer to this document
Please let me know if you need more information.
Regards
Geetha