Guides

Practical walkthroughs for common tasks. Each guide takes you from start to finish with clear steps and working examples.

Getting Started

Create your merchant account and configure your organization.

Connect your NMI payment gateway and start processing.

API keys, SDKs, and your first API call.

Create and manage recurring billing plans.

Set up metered billing with usage events and meters.

Configure automatic payment recovery for failed charges.

Generate, send, and track invoices.

Process card payments, refunds, and voids.

Embed hosted checkout pages and payment links.

Let customers manage their own billing.

Automate tax compliance with Quaderno.

Receive real-time event notifications.

Connect RevKeen to 5,000+ apps.