> ## Documentation Index
> Fetch the complete documentation index at: https://docs.creem.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Creating a Checkout Session
> Learn how to create dynamic checkout sessions programmatically with Creem
# Creating a Checkout Session
Learn how to programmatically create checkout sessions for your products using Creem's APIs and SDKs.
## Video Tutorial
## What is a Checkout Session?
A checkout session is a dynamically generated payment page that gives you programmatic control over the payment flow. Unlike static payment links, checkout sessions allow you to:
* Pass custom tracking IDs for each payment
* Pre-fill customer information
* Set dynamic success URLs based on your app's context
* Apply discount codes programmatically
* Add metadata for internal tracking
## Prerequisites
Before you begin, make sure you have:
* A Creem account with an API key
* At least one product created in your dashboard
* Your development environment set up
Find your product ID by going to the [Products
tab](https://creem.io/dashboard/products), clicking on a product, and
selecting "Copy ID" from the options menu.
## Quick Start
Choose your preferred integration method:
Use the Next.js adapter for seamless integration
Full type-safety for any JavaScript framework
Integrate with authentication and user management
Use the REST API from any language
## Common Use Cases
### 1. Pre-fill Customer Email
Ensure users complete payment with their registered email:
```typescript theme={null}
const checkout = await creem.checkouts.create({
productId: 'prod_YOUR_PRODUCT_ID',
customer: {
email: 'user@example.com',
},
});
```
### 2. Track Payments with Custom IDs
Associate payments with your internal system:
```typescript theme={null}
const checkout = await creem.checkouts.create({
productId: 'prod_YOUR_PRODUCT_ID',
requestId: 'order_12345',
metadata: {
userId: 'internal_user_id',
source: 'marketing_campaign',
},
});
```
### 3. Apply Discount Codes
Pre-fill discount codes for special offers:
```typescript theme={null}
const checkout = await creem.checkouts.create({
productId: 'prod_YOUR_PRODUCT_ID',
discountCode: 'LAUNCH50',
});
```
### 4. Seat-Based Billing
Charge for multiple units or seats:
```typescript theme={null}
const checkout = await creem.checkouts.create({
productId: 'prod_YOUR_PRODUCT_ID',
units: 5, // Charge for 5 seats
});
```
## Next Steps
View the complete Checkout API reference
Set up webhooks to receive real-time payment notifications
Learn how to test without processing real payments
Brand your checkout with custom colors and logos
## Need Help?
Having trouble? Check out our [complete Checkout API
documentation](/features/checkout/checkout-api) or [contact
us](https://www.creem.io/contact)