DEVELOPER DOCUMENTATION
HSA / FSA Payments
Integrate HSA/FSA payments in minutes. Simple REST API with Python and TypeScript SDKs. Compliance, LMN generation, and eligibility verification handled for you.
Getting Started
Checkout
Process one-time HSA/FSA payments at checkout
View guide →Subscriptions
Handle recurring payments and subscription management
View guide →API Reference
Complete reference for all endpoints and SDKs
Explore API →OpenAPI Spec
Download the spec for AI agents, Postman, SDK generation, or offline reference
Download spec →
