API reference
Every Flint resource, endpoint by endpoint. 31 resources across 7 groups, all plain HTTP+JSON authenticated with your API key. The same surface is described by the OpenAPI spec.
Resources
31
Endpoints
274
Webhook events
87
Using the API
Developer Setup
Create a merchant, complete API-first onboarding, and mint the first Flint API key.
API Keys
Create and manage Flint Pay API keys for secure server-side authentication.
OpenAPI
Download the Flint Pay OpenAPI spec for code generation, agents, SDKs, and API tooling.
Errors
Every error code with its category, retryability, and fix.
Webhook events
All webhook event types Flint delivers.
Core commerce
Fulfillment
Payments
Subscriptions
Events & logs
Account & platform
Merchants3 endpoints
Organizations9 endpoints
Settings5 endpoints
Analytics3 endpoints
Devices5 endpoints
Sandboxes6 endpoints
Onboarding8 endpoints
Account management1 endpoint
Partner apps8 endpoints
Partner OAuth3 endpoints
Users
User records are not exposed on the external merchant API surface.
Locations
Understand how merchant locations appear on the public API and where location-scoped behavior is exposed today.
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