Read customer data with REST API

Hey Martin,
 
It would depend on the type of information you're trying to read, and would require OAuth to authenticate you're app. Here's a couple of links to the relevant docs which should help clarify things for you:
 

• https://developer.zendesk.com/documentation/ticketing/getting-started/making-requests-to-the-zendesk-api/#getting-data-from-your-zendesk-product
• https://support.zendesk.com/hc/en-us/articles/4408845965210-Using-OAuth-authentication-with-your-application

 
If you have any questions, feel free to reach out.
 
Tipene