Hi, I would like to use the API to add internal Contacts, could someone share with me which end point should I invoke?
To create and update extensions. Use these APIs
Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.
Download RingCentral Phone for Desktop:
Tip: switch to the "sandbox mode" before logging in the app:
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