> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cuprice.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Checkout Flow

> What happens when a user buys a plan

## Regular plan checkout

1. User clicks **"Choose Plan"** on a pricing card
2. Cuprice calls `POST /api/stripe/checkout` with the plan ID
3. Stripe creates a checkout session with the plan's price
4. User completes payment on Stripe's hosted page
5. Stripe redirects to your success URL with `session_id`

## Custom plan checkout

1. User clicks **"Create Now"** on the custom plan card
2. User selects individual features and quantities
3. Cuprice calculates the total price automatically
4. Cuprice calls `POST /api/stripe/checkout/custom` with selected features
5. Same Stripe checkout flow as above

## After payment

After successful payment, Stripe redirects the user to your **Success URL**. The URL contains a `session_id` parameter that you use to look up what was purchased.

```
https://yoursite.com/?payment=success&session_id=cs_live_a1b2c3...
```

See [Redirect URLs](/payments/redirect-urls) for setup and [Feature Gating](/feature-gating/overview) for how to check what was purchased.