checkout-implementation
Implements Stripe payment flows -- Checkout Sessions, Payment Element, subscription signup, and customer reuse. Use when the user wants to "add checkout", "build a payment flow", "integrate Stripe payments", "add a paywall", or "subscription signup". For conversion analysis, see checkout-conversion.
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- appeeky/stripe-skills
- Last source activity
- July 19, 2026 at 10:10
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- checkout-implementation
- description
- Implements Stripe payment flows -- Checkout Sessions, Payment Element, subscription signup, and customer reuse. Use when the user wants to "add checkout", "build a payment flow", "integrate Stripe payments", "add a paywall", or "subscription signup". For conversion analysis, see checkout-conversion.
- metadata
- {"version":"1.0.0"}
# Checkout Implementation
Builds Stripe payment flows matched to the project stack.
## Choose the approach
| Need | Use |
|------|-----|
| Fastest, hosted | Stripe Checkout (`checkout.sessions.create`) |
| Embedded, custom UI | Payment Element + PaymentIntent/SetupIntent |
| Recurring | subscription mode |
## Checkout Session essentials
- mode: subscription
- line_items: price + quantity
- customer OR customer_email (reuse existing customer to avoid dupes)
- success_url / cancel_url
- allow_promotion_codes: true
- subscription_data metadata: user_id
- automatic_tax enabled (if using Stripe Tax)
## Critical rules
- **Reuse customer**: check for existing `stripe_customer_id`; for plan changes use `subscriptions.update` (proration), never a 2nd subscription
- Pass `user_id` in metadata for webhook provisioning
- Server-side price validation (whitelist price IDs)
## Verify
`stripe_implementation_planner` (MCP) for architecture; test with test cards; confirm via `webhook-implementation`.
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