API Explorer
Get started quickly with our sample code and libraries. If you get stuck, Avalara Support and Avalara's developer community are here with answers. These APIs are intended to help you determine whether you have the necessary subscription to use certain API calls. You can examine the subscriptions returned from this API call to look for a particular product or subscription to provide useful information to the current user as to whether they are entitled to use specific features.
Avalara APIs
Tax calculation
Compliance document management
Returns & filing