---
title: Recommendations configuration
slug: product-recommendations/docs/recommendations-configuration
docTags: 
createdAt: 2026-07-30T20:41:30.384Z
---

If the Recommendations product were enabled for the current page, you can request that additional product attributes for the product be supplied in the smartRecs response.

| Name      |                 | Description and usage                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| --------- | --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| smartRecs |                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|           | showAttributes  | \[Optional]<br />Controls which attributes to show in the smartRecs callback.<br />An array of attribute names to send in the smartRecs callback. If this property is not supplied, no attributes are sent. If this property is set to "\*", all available attributes are sent.                                                                                                                                                                                                                                          |
|           | markRecsAsShown | \[Optional]<br />Whether all recommendations sent as the response are rendered.<br />This must be included if a subset of recommendations sent as the response is rendered on the front end of your site/application.<br />Default is true; that is, all recommendations in the response are assumed to be rendered. See [Rendering Recommendations](docId\:P0rOMcgO6DeEMy0-FiMkP).<br />If set to false, an additional API call needs to be made to inform Optimizely of the IDs of recommendations that were rendered. |

**Recommendations configuration example**

For example, on a product page tracking request, to show all attributes for the recommended products, you might send the following.

```csharp
{
      "type"        : "product",
      "ip"	        : "10.42.37.139",
      "session"     : "123456789012|a1b2c3d4e5A6B7C8D9E0f1g2h3i4j5F1G2H3I4J5k1l",
      "cuid"        : "09876543210|Z0Y9X8W7V6z5y4x3w2v1U0T9S8R7Q6u5t4s3r2q1P0O",
      "site"        : "retailer",
      "clientToken" : "1234abcd5678",
      "channel"     : "web",
      "lang"        : "en-gb",
      "currentURI"	: "www.retailer.com/product/RC123.html",
      "previousURI" : "www.retailer.com/home",
      "userAgent"   : "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36",
      "smartRecs"   : {
                        "showAttributes": ["*"]
                      },
      "product"     : {
                        "refCode": "RC123"
                      }
    }
```

For the callback to contain only the attribute "colour" for each recommended product, send the following.

```csharp
{
      "type"        : "product",
      "ip"          : "10.42.37.139",
      "session"     : "123456789012|a1b2c3d4e5A6B7C8D9E0f1g2h3i4j5F1G2H3I4J5k1l",
      "cuid"        : "09876543210|Z0Y9X8W7V6z5y4x3w2v1U0T9S8R7Q6u5t4s3r2q1P0O",
      "site"        : "retailer",
      "clientToken" : "1234abcd5678",
      "channel"     : "web",
      "lang"        : "en-gb",
      "currentURI"  : "www.retailer.com/product/RC123.html",
      "previousURI" : "www.retailer.com/home",
      "userAgent"   : "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36",
      "smartRecs"   : {
                        "showAttributes": ["colour"]
                      },
      "product"     : {
                        "refCode": "RC123"
                      }
    }
```