## Flex HSA/FSA Documentation

Learn how to get started with Flex HSA/FSA payments.

## Let’s get started

[**Developer Guides**](https://docs.withflex.com/developer-guides/introduction)  
Complete guides for integrating HSA/FSA payments with Flex.

[**API Reference**](https://docs.withflex.com/api-reference/introduction)  
Comprehensive API reference for developers using Flex.

[**Flex MCP**](https://docs.withflex.com/developer-guides/integration/mcp/overview)  
Connect Claude, Cursor, and other AI assistants to your Flex account.

[**Marketing**](https://docs.withflex.com/merchant-success/introduction)  
Resources and assets to help promote Flex HSA/FSA payments.

[**Changelog**](https://docs.withflex.com/changelog)  
Latest updates and improvements to Flex.