Avalara

E-Invoicing REST API

The Avalara E-Invoicing REST API supports sending data within the Alpha scope for e-Invoicing compliance use cases, enabling technology partners to integrate e-invoicing workflows for cross-border and domestic compliance.

Documentation GitHub OpenAPI

Documentation

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Documentation

https://developer.avalara.com/api-reference/e-invoicing/v1.0

Specifications

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OpenAPI

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