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

# Interactive API Playground

> Test API endpoints with the interactive playground

<Note>
  **Authentication Required:** You'll need a valid access token to test
  endpoints. Get your token from the
  [Authentication](/api-reference/authentication/introduction) guide.
</Note>

***

## How to Use the Playground

1. **Select an endpoint** from the navigation menu (see "OpenAPI Endpoints" section)
2. **Fill in parameters** - Path parameters, query parameters, request body
3. **Add your access token** - In the "Authorization" header
4. **Click "Send"** - Test the endpoint and view the response
5. **View response** - See status code, headers, and response body

***

## Available Endpoints

The interactive playground is available for all endpoints in the OpenAPI specification:

<CardGroup cols={2}>
  <Card title="Transactions" icon="credit-card" href="/api-reference/transactions">
    Start interactions and send transactions
  </Card>

  <Card title="Import Catalog" icon="box" href="/api-reference/import">
    Import products, categories, and promotions
  </Card>

  <Card title="Coupons" icon="ticket" href="/api-reference/coupons">
    Search and validate coupons
  </Card>

  <Card title="Loyalty" icon="award" href="/api-reference/loyalty-cards">
    Manage loyalty cards and points
  </Card>

  <Card title="Widgets & CFS" icon="tv" href="/api-reference/widgets">
    Customer-facing screen and widgets
  </Card>

  <Card title="Settings" icon="gear" href="/api-reference/settings">
    Company and location settings
  </Card>

  <Card title="Authentication" icon="key" href="/api-reference/authentication/introduction">
    OAuth2 token endpoints
  </Card>
</CardGroup>

***

## Need Help?

<CardGroup cols={2}>
  <Card title="Quick Start Guide" icon="rocket" href="/api-reference/quick-start">
    Get started with your first API call
  </Card>

  <Card title="Environments" icon="server" href="/api-reference/environments">
    View available API environments
  </Card>
</CardGroup>