Shared Services provide common capabilities used across Avalara products, such as address validation, company data management, and product classification. These services standardize the core data required for tax calculation, compliance workflows, and reporting.

Core capabilities

Validate and normalize addresses to map transactions to the correct tax jurisdictions.

Address validation and geolocation

Manage company, entity, and contact data through shared APIs used across Avalara services.

Centralized company and contact management

Classify products using standardized tax categories (for example, HS codes) to ensure correct tax treatment across regions and tax systems.

Product classification and taxability support

Use Shared Services across calculation, returns, invoicing, and other compliance workflows.

Reusable compliance services

Access Shared Services APIs in the developer portal, including endpoints for address validation, company management, and classification. Integrate these services independently or as part of broader Avalara product workflows.

Getting started

Use APIs to embed Shared Services into workflows such as tax calculation, onboarding, compliance validation, and reporting. These services act as reusable building blocks across Avalara products.

How it integrates

What Shared Services solves

When to use Shared Services

Shared Services

API reference

Object for storing one or more aspects for this company (for example, ELR, AvaTax, and so on)

An Identifier that uniquely identifies belonging aspect for this company in delivery system

The location of this aspect from delivery system

Namespace uniquely identifies the delivery system

Aspect

AspectFetchResult

AspectRequest

Company model object used to create a company

Avalara Network Identifier (ANI) - a unique 15-character identifier automatically generated at company creation.

The child companies within this parent company

A unique code that references this company within your account

Company identifiers following international standards.

The two character ISO-3166 country code for this company.

Indicates whether the user has provided consent to include this company in the directory. This field is available starting from API version 1.1.

Company

Object for storing contact information for a company

The city of the postal mailing address of this contact.
maxLength: 50
minLength: 0

A unique code within the associated company for this contact.
maxLength: 25
minLength: 0

This field supports many different country identifiers:

Two character ISO 3166 codes
Three character ISO 3166 codes
Fully spelled out names of the country in ISO supported languages
Common alternative spellings for many countries
For a full list of all supported codes and names, please see the Definitions API ListCountries.

The facsimile phone number for this contact.

The first or given name of this contact.
maxLength: 50
minLength: 0

The last or family name of this contact.
maxLength: 50
minLength: 0

The first line of the postal mailing address of this contact.
maxLength: 100
minLength: 0

The second line of the postal mailing address of this contact.
maxLength: 50
minLength: 0

The third line of the postal mailing address of this contact.
maxLength: 50
minLength: 0

The middle name of this contact.
maxLength: 50
minLength: 0

The mobile phone number for this contact.

The postal code or zip code of the postal mailing address of this contact.
maxLength: 10
minLength: 0


Name or ISO 3166 code identifying the region within the country.

Professional title of this contact.
maxLength: 50
minLength: 0

CompanyContact

Response returned when querying companies

CompanyFetchResult

Company identifier following international standards

Unique identifier for the company service

Date/time when the identifier was created

The type of company identifier using URN format.

For more information on identifier taxonomy, see [Company Identifier Taxonomies](https://avalara.atlassian.net/wiki/spaces/ATPE/pages/638741779220/Company+Identifier+Taxonomies).

Date/time when the identifier was last modified

CompanyIdentifier

Company identifier request object for POST/PUT operations

CompanyIdentifierRequest

An object for storing the company identifier

CompanyParent

The two character ISO-3166 country code for this company

Specifies whether this is an active company

CompanyRequest

ContactFetchResult

Response information for requests that result in an error

CustomException

Additional information about the error and instance

ErrorInfo

Contact deleted!

Additional information about the response and instance

Info

Object for storing reference information for this entity

Location of the representing entity in the company URL

Reference

Object for storing company resolution infromation

ResolveCompany

Object for storing results when retrieving company information

ResolveCompanyFetchResult

Object for storing company request resolution information

ResolveCompanyRequest

APIs for managing canonical Company and Contact information across Avalara products.

This API is hosted under https://api.avalara.com.

Version 1.2 introduces support for company identifiers: 
- urn:avalara:company:identifier:global:gs1:gln (Global Location Number)
- urn:avalara:company:identifier:global:dnb:duns (DUNS)
- urn:avalara:company:identifier:global:gleif:lei (Legal Entity Identifier)

Shared Company Service API

Use this endpoint to retrieve all companies for a calling tenant. Company identifiers are only returned when included in the $include parameter.

A comma separated list of objects to fetch underneath this company. Any object with a URL path underneath this company can be fetched by specifying its name. Use 'companyIdentifiers' to include company identifiers in the response.

$include

A filter statement to identify specific records to retrieve.

$filter

If nonzero, return no more than this number of results. Used with `$skip` to provide pagination for large datasets. Unless otherwise specified, the maximum number of records that can be returned from an API call is 1,000 records.

$top

If nonzero, skip this number of results before returning data. Used with `$top` to provide pagination for large datasets.

$skip

A comma separated list of ascending or descending sort statements in the format `(fieldname) [ASC|DESC]`, for example `companyCode DESC`

$orderBy

`false` by default. If `true`, then the API will return the entire hierarchy of the company specified in the filter.

returnHierarchy

Identifies the software you are using to call this API.  For more information on the client header, see [Client Headers](https://developer.avalara.com/avatax/client-headers/).

X-Avalara-Client

Use the X-Correlation-ID header to support request correlation through requests. This header should be present on all requests and responses.

X-Correlation-Id

The HTTP Header meant to specify the version of the API intended to be used

avalara-version

Use this endpoint to create a company. Company identifiers support is available in version 1.2+.

Use this endpoint to retrieve information about a single company. Company identifiers are returned if they exist for the company, regardless of API version.

The ID of the company. Run `get /companies` for a list of available company IDs.

companyId

Use this endpoint replace the existing company object at this URL with an updated object. Company identifiers support is available in version 1.2+.

Use this endpoint to retrieve all aspects for a specific `companyId`.

A comma separated list of objects to fetch underneath this company. Any object with a URL path underneath this company can be fetched by specifying its name.

For more information on filtering, see [Filtering in REST](https://developer.avalara.com/avatax/filtering-in-rest/).

A filter statement to identify specific records to retrieve.For more information on filtering, see [Filtering in REST](https://developer.avalara.com/avatax/filtering-in-rest/). 

 *Filterable:* namespace 

 *Operators supported:* EQ/=, IN

A comma separated list of ascending or descending sort statements in the format `(fieldname) [ASC|DESC]`, for example `contactCode DESC`

If TRUE, return total count of records falling under the specified criteria from request.

$count

Retrieve all active aspects for a company

Use this endpoint to create aspects for a specific `companyId`.

Use this endpoint to delete a specific aspect.

Use this endpoint to retrieve a specific aspect for a specific company. 

This is the only API which can retrieve even deleted aspect.

Retrieve a single aspect for a specific company.

Combination of *namespace:identifier*. 

 *namespace:* uniquely identifies the delivery system 

*identifier:* uniquely identifies the belonging aspect to this company in delivery system

aspectKey

Use this endpoint replace the existing aspect object at this URL with an updated object.

Use this endpoint to retrieve all contacts for a specific `companyId`.

A filter statement to identify specific records to retrieve.

For more information on filtering, see [Filtering in REST](https://developer.avalara.com/avatax/filtering-in-rest/).

Use this endpoint to create contacts for a specific `companyId`.

Use this endpoint to delete a specific contact.

Use this endpoint to retrieve a specific contact for a specific company.

Retrieve a single contact for a specific company

The ID of the contact. Run `get /companies/{companyId}/contacts` for a list of contacts for this company.

contactId

Use this endpoint replace the existing contact object at this URL with an updated object.