All Zoho Assist APIs need to be authenticated using an OAuth token.

OAuth 2.0 is an open authorization protocol which grants third-party applications limited access to user accounts on an HTTP service. The authentication and authorization process is facilitated only between the end user and the HTTP service. Zoho APIs use OAuth 2.0 to provide dependable security for your application data. It delegates authorization and authentication for web and desktop applications and mobile devices.

You can obtain an OAuth token by following the steps mentioned below:

  1. Step 1: Registering a Client
  2. Step 2: Making the Authorization Request
  3. Step 3: Generating Tokens
  4. Step 4: Refreshing your Access Tokens
  5. Step 5: Revoking Tokens