Avalara · Authentication Profile

Avalara Authentication

Authentication

Avalara secures its APIs with http and oauth2 across 3 declared security schemes, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the authorizationCode, clientCredentials, password, deviceCode, and refreshToken flow(s).

Taxes
Methods: http, oauth2 Schemes: 3 OAuth flows: authorizationCode, clientCredentials, password, deviceCode, refreshToken API key in:

Security Schemes

bearerAuth http
scheme: bearer
basicAuth http
scheme: basic
AvalaraIdentity oauth2
· flows: clientCredentials, authorizationCode

Source

Authentication Profile

Raw ↑ 
generated: '2026-06-20'
method: searched
source: openapi/ security schemes + https://identity.avalara.com/.well-known/openid-configuration
docs: https://developer.avalara.com/avatax/authentication-in-rest/
notes: >-
  The per-API OpenAPI specs declare HTTP basic and bearer schemes. AvaTax REST v2
  accepts either HTTP basic (username/password, or accountId/licenseKey) or an
  OAuth 2.0 bearer token. Platform authorization is OAuth 2.0 / OIDC issued by
  IdentityServer at identity.avalara.com (see scopes/avalara-scopes.yml for the
  full endpoint + scope surface). Upgraded from derived to searched with the docs
  auth page and the live OIDC discovery document.
summary:
  types:
  - http
  - oauth2
  http_schemes: [basic, bearer]
  oauth2_flows: [authorizationCode, clientCredentials, password, deviceCode, refreshToken]
schemes:
- name: bearerAuth
  type: http
  scheme: bearer
  description: OAuth 2.0 bearer token
  sources:
  - openapi/avalara-1099-w9-openapi.yml
  - openapi/avalara-activation-service-openapi.yml
  - openapi/avalara-avatax-brazil-openapi.yml
  - openapi/avalara-avatax-rest-openapi.yml
  - openapi/avalara-business-openapi.yml
  - openapi/avalara-e-invoicing-openapi.yml
  - openapi/avalara-excise-openapi.yml
  - openapi/avalara-hs-code-classification-openapi.yml
  - openapi/avalara-item-classification-openapi.yml
  - openapi/avalara-mylodgetax-openapi.yml
  - openapi/avalara-shared-company-service-openapi.yml
  - openapi/avalara-vat-reporting-openapi.yml
- name: basicAuth
  type: http
  scheme: basic
  description: Use your AvaTax username/password or accountId/licenseKey as basic auth credentials
  sources:
  - openapi/avalara-avatax-rest-openapi.yml
  - openapi/avalara-certcapture-openapi.yml
  - openapi/avalara-communications-openapi.yml
  - openapi/avatax-apis-openapi.yml
- name: AvalaraIdentity
  type: oauth2
  description: >-
    OAuth 2.0 / OpenID Connect via Avalara IdentityServer (identity.avalara.com).
    Supports authorization_code (+ PKCE S256), client_credentials, password,
    device_code, token-exchange and refresh_token grants.
  source: https://identity.avalara.com/.well-known/openid-configuration
  flows:
    - flow: clientCredentials
      tokenUrl: https://identity.avalara.com/connect/token
    - flow: authorizationCode
      authorizationUrl: https://identity.avalara.com/connect/authorize
      tokenUrl: https://identity.avalara.com/connect/token
  scopes_ref: scopes/avalara-scopes.yml