> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://avalara.ferndocs.com/_mcp/server.

# Marketplace

> API solutions for end-to-end tax compliance.

## Docs

- [Before you begin](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/before-you-begin.md)
- [Authentication](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/authentication.md)
- [Error handling](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/error-handling.md)
- [Configure AvaTax](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/configure-avatax.md)
- [AvaTax transaction concepts](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/avatax-transaction-concepts.md)
- [Design the user experience](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/design-the-user-experience.md)
- [Design the transaction workflow](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/design-the-transaction-workflow.md)
- [Test transactions](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/test-transactions.md)
- [Calculate tax offline](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/calculate-tax-offline.md)
- [Functional review](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/functional-review.md)
- [Revision history](https://avalara.ferndocs.com/docs/integration-guides/sales-and-use-tax/marketplace/revision-history.md)