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Gale’s API platform enables merchants to securely manage HSA/FSA-eligible product checkouts through a simple, powerful, and flexible API. This Developer Manual is your guide to understanding the structure, principles, and capabilities of the Gale API before diving into individual endpoints.

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Docs Structure

Our documentation is split into two parts:

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Developer Manual (this section)

Conceptual documentation that explains how the Gale system works:
  • Integration flow
  • Security & reliability principles
  • Setup guides

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API Reference

A full list of REST endpoints complete with request and response schemas

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Core Capabilities

Gale’s API helps you:
  • Sync your product catalog with Gale
  • Create secure hosted checkout sessions
  • Receive order/payment updates via webhooks
  • Issue refunds or cancel checkouts
  • Support subscriptions and one-time purchases

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