# Account Provisioning API: Account Operations

The Twilio SendGrid Account Provisioning API provides a platform for Twilio SendGrid resellers to manage their customers. This API is for companies that have a formal reseller partnership with Twilio SendGrid.

You can access Twilio SendGrid sub-account functionality without becoming a reseller. If you require sub-account functionality, see the Twilio SendGrid Subusers feature, which is available with [Pro and Premier plans](https://sendgrid.com/pricing/).

The Account Provisioning API account operations allow you to create, retrieve, and authenticate customer accounts.