We have great news for you! Recently, we have launched 16 new APIs in the Campaigns Contact list suite of APIs, and an API to update the Exotel Address book is one of the features. This feature has been requested many times by our customers and we have enhanced the APIs just for that!
Here is what you are looking for: APIs,
Please find the article below on how to find your Account Sid, API Key, and API token details.
To learn more about the new APIs and their features write to firstname.lastname@example.org or call us at 08088-919-888.