Merge pull request #333 from AdobeDocs/kh_playground

Add links to API playground

src/pages/graphql/index.md

@@ -22,3 +22,7 @@ The following image shows a sample query, its response, and the GraphQL browser:
 <InlineAlert variant="info" slots="text" />
 
 The Catalog Service, Live Search, and Product Recommendations services have schemas that are independent from the core schema for Adobe Commerce and Magento Open Source. You can find the schema reference documentation and examples for these services in [Storefront Services GraphQL](https://developer.adobe.com/commerce/services/graphql/).
+
+## Commerce API playground
+
+The [Commerce API playground](https://experienceleague.adobe.com/developer/commerce/storefront/playgrounds/commerce-services/) enables you to run selected queries against a live instance of Adobe Commerce with Luma sample data. The playground includes example core and Storefront Services queries. You can customize the output of the queries to help you understand the power of our GraphQL APIs.

src/pages/graphql/schema/cart/queries/cart.md

@@ -22,6 +22,10 @@ The [`cart`](https://developer.adobe.com/commerce/webapi/graphql-api/index.html#
 
 ## Sample queries
 
+The [Commerce API playground](https://experienceleague.adobe.com/developer/commerce/storefront/playgrounds/commerce-services/) provides a sample `cart` query that you can run against a live instance of Adobe Commerce with Luma sample data.
+
+You can convert the hard-coded `cart_id` values in the following sample queries to a [variable](../../../usage/index.md#query-variables) and run them in the API playground. Note that the responses may vary, depending on the configuration of the Commerce instance.
+
 ### Cart ready for checkout
 
 The following query shows the status of a cart that is ready to be converted into an order.

src/pages/graphql/schema/store/queries/store-config.md

@@ -16,6 +16,8 @@ The [`storeConfig`](https://developer.adobe.com/commerce/webapi/graphql-api/inde
 
 ## Example usage
 
+The [Commerce API playground](https://experienceleague.adobe.com/developer/commerce/storefront/playgrounds/commerce-services/) provides a sample `storeConfig` query that you can run against a live instance of Adobe Commerce with Luma sample data. Note that the responses may vary, depending on the configuration of the Commerce instance.
+
 ### Query a store's configuration
 
 The `storeConfig` query can return `base` and `extended` store configuration setting. The following call returns all `base` details of a store's configuration.