APIs
Get started with interactive API documentation, sample payloads, and response examples. Use API Explorer to review endpoints, parameters, authentication requirements, and expected responses so you can make your first API call.
Select a product category to view related APIs
Calculations
AvaTax automates real-time sales and use tax determination across jurisdictions, enabling accurate tax calculation.
AvaTax for Communications automates communications tax determination for telecom, cable, VoIP, streaming, and related services.
AvaTax Excise automates excise tax determination for fuel, energy, tobacco, alcohol, and other regulated commodities.
Tariff Code Classification assigns accurate HS and tariff codes to products to support duty calculation and trade compliance.
Item Classification automates HS code assignment for accurate tariff classification and trade compliance.
Avalara Tax Content (ATC) provides centralized, regularly updated tax data to support accurate tax calculation across systems.
AvaTax Brazil automates indirect tax calculation and fiscal compliance for businesses operating in Brazil.
Classifies products based on the provided product information for the specified country of destination.
Returns
Avalara Managed Returns API enables partners and platforms to embed tax return preparation and filing into their workflows.
MyLodgeTax helps short-term rental operators and lodging platforms file and manage lodging tax based on a property’s rental address.
Avalara 1099 & W-9 helps you collect, validate, and report vendor tax data.
ECM
Exemption Certificate Management (ECM), also known as CertCapture, helps you collect, validate, and store exemption certificates in one place.
Exemption Certificate Management (ECM), also known as CertCapture, helps you collect, validate, and store exemption certificates in one place.
E-invoicing
Platforms
Licensing & registration
Used for placing Avalara License Guidance orders and passing in known information into the ALG questionnaire.
Get the number of licenses per location to entice customers to purchase an Avalara License Guidance report.
Provisions a customer account, creates orders, and returns account and order information.
Used to request a complete list of keywords to describe Business Activities in Avalara's License and Registration offerings.
Get detailed information for registrations and licenses completed by Avalara.
Returns the Question Keys to pre-populate Avalara's Tax Registration and License Filing online questionnaire.
Used to determine if local registrations are required for an address, and the order quantity for Payroll Tax Registration orders.
Get information about Avalara License Filings product availability based on state and business activities.