Introduction

Cadence

Cadence is a subscription billing platform built on top of iyzico. The API lets you create checkout sessions, manage subscribers, list invoices, and receive real-time webhook events — for both DIGITAL and PHYSICAL plans (physical plans support shipping pricing included in the billing total).

What you can do

• Plans — list your active pricing plans.
• Checkout — start a 3DS or non-3DS subscription, update a card, and handle the payment callback.
• Subscribers — check, retrieve, update, cancel, and undo-cancel subscriptions, and list invoices.
• Webhooks — receive signed, real-time notifications for subscription lifecycle events.

Base URL

All API requests are made to:

https://api.cadence.dev

Next steps

• Getting Started — make your first request.
• Authentication — how API credentials work.
• API Reference — full endpoint documentation.