Solutions Hub
Solution pages for the payment primitives your team will actually implement
Move between Flint's core APIs, platform patterns, and comparison pages based on the commerce stack you are trying to ship.
Developer Path
Start building with Flint
Use the quickstart, API reference, and benchmark to move from evaluation into a working integration.
Core solutions
These pages map directly to Flint's main developer surfaces and the system boundaries they replace.
Payment API
Order-first payments for developers who need line items, tax, discounts, refunds, and a full audit trail in one flow.
Payments for POS Integrators
Embedded payments for POS software teams that need orders, tips, tax, devices, merchant onboarding, and hosted fallback collection.
Payments for Vertical SaaS
Embed orders, checkout, invoices, subscriptions, and merchant onboarding into vertical software without stitching together separate payment products.
Payments for Kiosk Software
Build self-serve payment flows with device-aware settings, order-backed payment intents, receipts, and remote recovery paths.
Payments for Booking Platforms
Handle deposits, balances, packages, recurring plans, and no-show workflows inside booking and scheduling software.
Payments for Field Service Software
Handle dispatch deposits, onsite collection, office invoices, and recurring service billing inside field-service platforms.
Payments for Ticketing Platforms
Handle ticket tiers, registrations, attendee fields, capacity, add-ons, and refunds inside ticketing and registration software.
Payments for Membership Platforms
Support recurring dues, annual renewals, one-off assessments, and member event fees inside membership and association software.
Commerce API
Orders, payments, inventory, coupons, subscriptions, and refunds in one headless commerce stack.
Ecommerce Payment API
A payment API built for carts, order state, checkout, and downstream reconciliation rather than isolated charges.
Subscription API
Recurring billing with plans, subscriptions, hosted signup flows, and lifecycle handling in one platform.
Event Payments
Hosted payments and structured orders for tickets, registrations, fundraising events, and one-off campaigns.
AI Payments
A payments model that gives AI agents structured order data instead of raw charge amounts with no business context.
Hosted Checkout API for Developers
Hosted checkout for teams that need a specific order-backed payment page instead of a reusable generic link.
Checkout Sessions API for Developers
Specific hosted checkout sessions for one order, quick-pay flow, or subscription signup rather than a reusable public link.
Payment Links API for Platforms
Programmable hosted payment links for platforms that want fast remote collection without losing product context.
Invoice API with Hosted Payments
Invoice-led collection with hosted payment, reminders, manual settlement, and invoice-owned checkout sessions.
Webhook Infrastructure for Developers
Endpoint management, signing secrets, retries, delivery history, and event inspection for event-driven integrations.
Sandbox Environments for Payment APIs
Isolated Flint sandboxes, sandbox-bound test keys, clone-live flows, and resettable QA environments.
Sandbox Fixture and Clone-Live API
Clone live catalog, customers, settings, and webhooks into fresh sandboxes and issue bound test keys for QA or partner demos.
Idempotent Payment API
Idempotent payment writes for developers who need safe retries across payment intents, captures, invoices, and webhook-driven workflows.
API Request Logs for Payment Integrators
Per-key API request logs for debugging auth, retries, sandbox traffic, and request-level integration mistakes.
Analytics API for Merchant Platforms
Merchant analytics, payment-volume timeseries, and subscription metrics through the public API for platform reporting surfaces.
Saved Payment Methods API for Platforms
Saved payment methods for repeat purchases, subscriptions, and off-session billing without losing customer and order context.
Payment Method Setup API for Repeat Billing
Customer-linked setup intents, readiness checks, and default-payment assignment for repeat billing and saved-card flows.
Manual Capture and Authorization API
Two-step authorize-and-capture payment flows with optional partial capture and order-aware state transitions.
Off-Session Payments API
Off-session payments for platforms that need saved payment methods, later collection, and background billing tied to real customer context.
Payment Retry and Recovery API
Retry-safe payment recovery for teams that need order-aware retries, transient failure handling, and cleaner retry decisions.
BNPL Payments API for Platforms
BNPL-friendly payment flows for platforms that want Affirm as part of checkout without building a separate billing abstraction.
Invoice Collection API for B2B Platforms
Invoice collection for B2B platforms that need hosted invoice payment, reminders, delivery tracking, and manual settlement.
Merchant Onboarding API with KYB
Merchant onboarding for platforms that need hosted or embedded onboarding sessions, requirement tracking, and KYB-style activation flows.
Refunds API for Order-Based Payments
Order-aware refunds for teams that need full and partial refunds tied back to the order and payment intent that matter downstream.
Embedded Payments API for SaaS
Embedded payments for SaaS teams that want to keep checkout on their own surface while still using Flint's order-backed payment model.
Subscriptions API with Trials and Setup Fees
Recurring billing for teams that need plans, hosted signup, trials, setup fees, and subscription lifecycle in one API.
Subscription Payment Links API
Hosted recurring signup using payment links backed by subscription plans instead of custom billing UI.
Subscription Dunning API
Configurable dunning end actions, retry-day settings, and webhook-visible renewal failure handling for recurring billing teams.
Customer Profiles API for Payments
Customer records, default payment methods, merchant customer IDs, and billing data for repeat purchases and recurring billing.
Hybrid Online and Offline Payments API
Hosted checkout, invoice-led collection, and manual settlement on the same customer-specific balance record.
Quick Pay Invoice API
Direct invoice creation from pricing input without creating the order separately first.
Manual Invoice Payments API
Record and reverse offline invoice payments while keeping hosted invoice checkout and receivable state aligned.
Invoice Reminders API
Issue reminder deliveries, inspect delivery attempts, and keep invoice follow-up on the receivables record itself.
OAuth for Commerce Integrations
Hosted OAuth install flows for partner apps that need merchant approval, callback validation, and install-token exchange.
Partner Apps API
Installable partner apps for teams building OAuth-connected commerce integrations with app-owned webhook endpoints.
Scoped API Keys for Payment Platforms
Scoped external API keys for teams that need narrower auth, permission boundaries, and safer operational access.
API Keys for Merchant Platforms
Merchant-bound external API keys with explicit scopes for payments, logs, checkout, analytics, and device operations.
Organization-Scoped Settings API
Organization-scoped settings and policy records for teams that need shared defaults across multi-merchant platform accounts.
Multi-Tenant Payments API
Merchant-bound tenants, shared org hierarchy, inherited settings, and scoped auth for software platforms managing many accounts.
Developer Bootstrap API for Payments
Create the first merchant, default sandbox, and initial API key entirely over the API without the dashboard.
Developer API for Partner Webhooks
Partner-app webhook endpoints for install lifecycle and installed-merchant events, with secret rotation and source-type control.
Merchant Selection and Delegated Auth API
Hosted merchant selection and delegated app-approval flows for integrations that should not rely on shared API keys.
Policy Inheritance API for Multi-Merchant Platforms
Settings inheritance and policy enforcement across organization, location, device, and merchant scopes on one public API.
Webhook Testing Tools for Payments
Sandbox webhook delivery, event inspection, retry history, and signature-verification workflows for payment integrations.
Payments API for Ecommerce Platforms
Order-backed payments for ecommerce platforms that need catalog, checkout, refunds, and inventory-aware commerce state.
Headless Ecommerce Payments API
A headless ecommerce payments API for teams that want checkout flexibility without rebuilding orders, catalog, and post-purchase state.
Ecommerce Checkout API for Developers
Developer-first ecommerce checkout flows for teams choosing between embedded checkout, hosted checkout, and reusable payment surfaces.
Omnichannel Commerce API for POS and Ecommerce
One commerce model for teams that need online orders, in-person payments, devices, and refund state to stay aligned.
Merchant Devices API for POS Software
Create and manage merchant devices, location assignments, and hardware metadata through the public API.
Agent Commerce API
A commerce API for agent-driven workflows that need structured orders, refunds, hosted collection, and clear lifecycle state.
Tool-Callable Commerce API
A tool-callable commerce API with OpenAPI, SKILL.md, and order-backed workflows that fit coding agents and structured automation.
Commerce API for AI Support Agents
A support-agent-friendly commerce API for order lookup, refund actions, invoice collection, and request-level debugging.
Agent-Safe Payments API
A payments API designed for deterministic retries, structured state, and safer agent-driven workflows above raw charge objects.
Ecommerce Plugin Payments API
A payments API for ecommerce plugins that need merchant installs, order state, hosted collection, and post-purchase workflow context.
Checkout Extension Payments API
A payments API for checkout extensions that need safe collection actions, hosted fallback, and order-backed payment context.
Order Management Plugin API
An order management plugin API for teams that need order lookup, refund context, and post-purchase actions inside installable extensions.
Returns and Refunds Plugin API
A returns and refunds plugin API for teams building post-purchase extensions on top of order-backed refunds and hosted recovery flows.
B2B Commerce API
A B2B commerce API for teams that need order-backed balances, invoice collection, manual settlement, and post-payment workflow state.
Bank Transfer and Manual Settlement API
Manual settlement and bank-transfer-friendly receivables for teams that need invoices, hosted card fallback, and offline payment recording.
Commerce API with Server-Computed Totals
A commerce API where subtotal, discount, tax, paid, refunded, and balance are computed on the order instead of in app glue.
Payments API That Keeps Cart, Order, and Refund State in Sync
A payments API for teams that want checkout, payment, and refund flows to stay attached to one durable sale record.
Stripe Migration API for Platforms
A staged Stripe migration path for teams moving orders, checkout, refunds, and billing out of charge-first application glue.
Migrate from PaymentIntents to Orders
A practical migration path from PaymentIntent-led workflows to an order-first model that keeps payment collection familiar.
Commerce-First API vs Stripe Payments
A comparison for teams deciding whether they need a better processor integration or a better commerce model above it.
Payment Links API vs Hosted Checkout API
A workflow comparison for teams choosing between reusable payment links and specific hosted checkout sessions.
Stripe Alternative
A simpler developer-first way to handle orders, payments, discounts, subscriptions, and refunds without building the glue.