API Reference

Create a merchant, complete API-first onboarding, and mint the first Flint API key.

Create and manage Flint Pay API keys for secure server-side authentication.

Create orders with line items, totals, discounts, tax, payments, and refund context.

Create, send, collect, and track invoices through Flint Pay's public HTTP API.

Create payment intents to charge cards, confirm payments, and track payment status.

Save customer cards and payment methods for repeat purchases and recurring billing.

Create hosted checkout sessions to collect payments on a Flint-hosted checkout page.

Create hosted payment links for one-time purchases, deposits, and recurring signups.

Create full or partial refunds and track refund status through the Flint Pay API.

Create customer records, addresses, and saved payment methods for repeat purchases and billing.

Create reusable billing plans for recurring products, memberships, and subscriptions.

Create and manage recurring subscriptions, billing state, and renewal flows.

Register webhook endpoints, inspect deliveries, and debug event-driven Flint integrations.

Create and manage catalog items, pricing, and inventory through the Flint Pay API.

Create coupon codes with percentage or fixed-amount discounts for checkout and order flows.

Read and update merchant-scoped settings that control your Flint Pay integration.

Read merchant analytics, revenue trends, and payment metrics through the Flint Pay API.

Read and update your merchant profile, onboarding state, and core account details.

Read and manage merchant users, team access, and account roles through the API.

Create and manage merchant devices and device metadata through the Flint Pay API.