Avalara

Portal OAuth API

The Avalara Portal OAuth API provides OAuth token generation and session management endpoints for implementing authentication in Avalara platform integrations, supporting credential-based authentication and SAML assertions.

Documentation GitHub OpenAPI

Documentation

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Documentation

https://developer.avalara.com/api-reference/oauth/oauth/

Specifications

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OpenAPI

https://raw.githubusercontent.com/api-evangelist/avalara/refs/heads/main/openapi/avalara-portal-oauth-openapi.yml