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

AvaTax

Avalara Avatax is a cloud-based sales and use tax calculation system.

Communications

Provides communications tax calculations using information provided by jurisdiction codes.

Excise Tax

This service is the external programmatic interface into the Avalara Excise application.

MyLodgeTax

Provides sales and lodging tax compliance for short-term property rentals.

Item Classification

Provides the user with the capability to submit products for HS Classification and retrieve the HS Codes.

Avalara Tax Content for Retail

Automate tax content delivery for your brick-and-mortar business, whenever and however you need it.

AvaTax Brazil

Exposes the most commonly services available for interacting with the AvaTax-Brazil services

VAT Reporting

One solution to calculate rates, prepare returns, and manage documents

ECM Customers

One solution to calculate rates, prepare returns, and manage documents

CertCapture (Existing Customers)

One solution to calculate rates, prepare returns, and manage documents

e-invoicing Rest API

An API which supports sending data within the Alpha scope, in particular the e-Invoicing for compliance use-case.

Activation Service API

An API that allows technology partners to retrieve the status of their registrations.

Portal OAuth API

Exposes the available services for interacting with the Avalara Brazil Suite of services, allowing the exchange of compliance data with external solutions. This public API is intended to be used by businesses with a physical presence in Brazil.

Business API

Public APIs for doing business with Avalara, including registering customer accounts and creating sales orders. This API assumes that you've received an `offerCode`, `connectorId`, `leadSource`, and `campaignId` from Avalara.

Shared Company Service API

A set of scalable APIs for services that can be incorporated into various Avalara products.

Automated tariff code classification

A set of APIs to identify harmonized system (HS) codes for calculating customs duty rates.

1099 & W-9

Avalara 1099 & W-9 automates the collection, validation, and e-filing of IRS forms like 1099s and W-9s. It streamlines vendor onboarding, ensures TIN compliance through IRS matching, and simplifies year-end tax reporting with secure, scalable tools for businesses of all sizes.

License Guidance Order API

Applies to: Avalara License Guidance

Used for placing Avalara License Guidance orders and passing in known information into the ALG questionnaire.

License Guidance Teaser API

Applies to: Avalara License Guidance

Get the number of licenses per location to entice customers to purchase an Avalara License Guidance report.

Registrations and Licenses Order API

Applies to: Avalara License Guidance, Avalara Sales Tax Registrations, Avalara Payroll Tax Registrations, Avalara License Filings

Provisions a customer account, creates orders, and returns account and order information.

Registrations and Licenses Industry Keyword API

Applies to: Avalara License Guidance, Avalara Sales Tax Registrations, Avalara Payroll Tax Registrations, Avalara License Filings

Used to request a complete list of keywords to describe Business Activities in Avalara’s License and Registration offerings.

Registration and License Details API

Applies to: Avalara Sales Tax Registrations, Avalara Payroll Tax Registrations, Avalara License Filings

Get detailed information for registrations and licenses completed by Avalara (e.g. Tax ID, Filing Frequency).

Registrations and Licenses Question Keys API

Applies to: Avalara Sales Tax Registrations, Avalara Payroll Tax Registrations, Avalara License Filings

Returns the Question Keys to pre-populate Avalara’s Tax Registration and License Filing online questionnaire, reducing data input for your customer.

Payroll Registrations Location Quantity API

Applies to: Avalara Payroll Tax Registrations

Used to determine if local registrations are required for an address, and the order quantity for “Payroll Tax Registration Only” orders.

License Filing Availability API

Applies to: Avalara License Filings

Get information about Avalara License Filings product availability based on state and business activities.