Your product needs subscription checkout and account access tied to billing state.

When this becomes useful

A customer can pay, change plans or miss a payment while product access has to remain predictable. Study the event flow before treating checkout as the whole billing system.

What the template offers

Next.js subscription payments is a Next.js saas starter from Vercel. It offers a concrete implementation to inspect and adapt. A subscription app starting point. Review webhook integrity, plan entitlements and customer support flows for your own product.

Technical shape

Inspect checkout, webhook processing, customer records and the path from subscription state to product access.

Questions worth answering

• What happens when a payment is delayed or fails?
• Which source of truth grants access?
• Can webhook events be processed twice?

Inspect the source

Read the maintainer's README, license, setup instructions and current repository state before adapting the code.