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Avalara Items API

Manage product items and their tax classification

Avalara Items API is one of 73 APIs that Avalara publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.

Tagged areas include Item. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an AsyncAPI specification.

This API exposes 32 operations across 18 paths, and defines 2 schemas. It is described by OpenAPI 3.2.0, at version 1.0.

Requests are made against 3 base URLs: https://rest.avatax.com, https://sandbox-rest.avatax.com, http://{{baseurl}}.

32 operations 18 paths 2 schemas 8 DELETE13 GET8 POST3 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.0
Servers
https://rest.avatax.com
https://sandbox-rest.avatax.com
http://{{baseurl}}
Authentication
HTTP Basic, HTTP Bearer
Resource Areas
1

Authentication & Security 2

Avalara Items API declares 2 security schemes for authenticating requests. It accepts HTTP basic authentication (basicAuth). It accepts HTTP bearer tokens (bearerAuth).

  • basicAuth — Use your AvaTax username/password or accountId/licenseKey as basic auth credentials
  • bearerAuth — OAuth 2.0 bearer token

Paths & Operations 32

Across 18 paths, the API surfaces 32 operations — 8 DELETE, 13 GET, 8 POST, 3 PUT. Each is listed below with its method, path, parameters, and response codes.

Items 32

Manage product items and their tax classification

GET
/api/v2/companies/{companyId}/items
Avalara List Items for a Company
queryItems 4 params → 200
POST
/api/v2/companies/{companyId}/items
Avalara Create Items for a Company
createItems 1 param body → 201
DELETE
/api/v2/companies/{companyId}/items/{itemId}/classifications
Avalara BatchDeleteItemClassifications
3 params → 200
POST
/api/v2/companies/{companyId}/items/{itemId}/classifications
Avalara CreateItemClassifications
4 params body → 200
GET
/api/v2/companies/{companyId}/items/{itemId}/classifications
Avalara ListItemClassifications
3 params → 200
DELETE
/api/v2/companies/{companyId}/items/{itemId}/parameters
Avalara BatchDeleteItemParameters
3 params → 200
POST
/api/v2/companies/{companyId}/items/{itemId}/parameters
Avalara CreateItemParameters
4 params body → 200
GET
/api/v2/companies/{companyId}/items/{itemId}/parameters
Avalara ListItemParameters
3 params → 200
POST
/api/v2/companies/{companyId}/items/upload
Avalara BulkUploadItems
3 params body → 200
POST
/api/v2/companies/{companyId}/items/{itemId}/tags
Avalara CreateItemTags
4 params body → 200
DELETE
/api/v2/companies/{companyId}/items/{itemId}/tags
Avalara DeleteItemTags
3 params → 200
GET
/api/v2/companies/{companyId}/items/{itemId}/tags
Avalara GetItemTags
3 params → 200
POST
/api/v2/companies/{companyId}/classificationrequests/taxcode
Avalara CreateTaxCodeClassificationRequest
3 params body → 200
GET
/api/v2/companies/{companyId}/classificationrequests/taxcode
Avalara GetClassificationStatus
2 params → 200
DELETE
/api/v2/companies/{companyId}/itemcatalogue/{itemCode}
Avalara DeleteCatalogueItem
3 params → 200
DELETE
/api/v2/companies/{companyId}/items/{id}
Avalara DeleteItem
3 params → 200
GET
/api/v2/companies/{companyId}/items/{id}
Avalara GetItem
3 params → 200
PUT
/api/v2/companies/{companyId}/items/{id}
Avalara UpdateItem
4 params body → 200
DELETE
/api/v2/companies/{companyId}/items/{itemId}/classifications/{id}
Avalara DeleteItemClassification
4 params → 200
GET
/api/v2/companies/{companyId}/items/{itemId}/classifications/{id}
Avalara GetItemClassification
4 params → 200
PUT
/api/v2/companies/{companyId}/items/{itemId}/classifications/{id}
Avalara UpdateItemClassification
5 params body → 200
DELETE
/api/v2/companies/{companyId}/items/{itemId}/parameters/{id}
Avalara DeleteItemParameter
4 params → 200
GET
/api/v2/companies/{companyId}/items/{itemId}/parameters/{id}
Avalara GetItemParameter
4 params → 200
PUT
/api/v2/companies/{companyId}/items/{itemId}/parameters/{id}
Avalara UpdateItemParameter
5 params body → 200
DELETE
/api/v2/companies/{companyId}/items/{itemId}/tags/{itemTagDetailId}
Avalara DeleteItemTag
4 params → 200
GET
/api/v2/companies/{companyId}/items/{itemCode}/premiumClassification/{systemCode}
Avalara GetPremiumClassification
4 params → 200
GET
/api/v2/companies/{companyId}/classificationrequests/taxcode/{requestId}/recommendations
Avalara GetTaxCodeRecommendations
3 params → 200
GET
/api/v2/companies/{companyId}/items/{itemCode}/restrictions/import/{countryOfImport}
Avalara ListImportRestrictions
4 params → 200
GET
/api/v2/items
Avalara QueryItems
1 param → 200
GET
/api/v2/companies/{companyId}/items/bytags/{tag}
Avalara QueryItemsByTag
3 params → 200
POST
/api/v2/companies/{companyId}/itemcatalogue
Avalara SyncItemCatalogue
3 params body → 200
POST
/api/v2/companies/{companyId}/items/sync
Avalara SyncItems
3 params body → 200

Schemas 2

The contract defines 2 schemas that model the data the API accepts and returns. The most detailed are ItemModel (6 properties), FetchResult_ItemModel (2 properties). Each schema is shown below with its type and property counts.

FetchResult_ItemModel
object
2 properties
ItemModel
object
6 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

avalara-items-api-openapi.yml Raw ↑

Other APIs Avalara publishes across the network.

AvaTax SOAP API
Avalara Tax Content for Retail Configuration API
Self-Serve Tariff Classification API
License Guidance Order API
Avalara 1099 Forms API
Avalara Accounts API
Avalara Addresses API
Avalara AdvancedRules API
Avalara Attributes API
Avalara Authentication API
Avalara AvaFileForms API
Where this information came from

This is an independent, third-party profile of Avalara Items API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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