# Web event specificity

## Fields automatically added to event

The [JS SDK](/features/sources/sources-catalog/web/js-sdk.md), [Web container](/features/sources/sources-catalog/web/containers.md) and [GTM bridge](/features/sources/sources-catalog/web/gtm.md) add automatically specific properties in the event regarding the browser.\
Here is a complete event payload example :

```json
{
   "event_name": "search",
   "search_term": "t-shirts",
   "url": "https://www.mywebsite.com/path1/path2/", //Automatically added if missing
   "path": "/path1/path2/", //Automatically added
   "referrer": "https:///www.google.fr", //Automatically added
   "title": "My page title", //Automatically added if missing
   "user": {
      "id": "12345",
      "consistent_anonymous_id": "567892" //Automatically added
      "email": "toto@domain.fr",
      "consent_categories": ["1","3"] //Automatically added if you use Commanders Act CMP
   },
   "context": {
      "event_id": "202110130000000000", //Automatically added
      "generatorVersion": "10.0", //Automatically added
      "containerVersion": "3.1", //Automatically added
      "event_timestamp": "1639044446636", //Automatically added
      "page": { //Automatically added
         "title": "Search page", //Automatically added
         "url": "https://shop.com/search?q=...", //Automatically added
         "lang": "en", //Automatically added
         "referrer": "https:///www.google.fr", //Automatically added
         "viewport": { //Automatically added
            "width": 320, //Automatically added
            "height": 568 //Automatically added
         }
      },
      "device": { //Automatically added
         "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36",//Automatically added
         "ip": "102.3.4.56",//Automatically copied from the request header
         "lang": "fr",//Automatically added
         "cookie": "_fbp=123; _fbc=456; _ga=789",//Automatically added
         "timezone": "Europe/Paris"//Automatically added
      }
   }
}
```

## Fields automatically added

<table><thead><tr><th>Field name</th><th>Example value</th><th>Description</th></tr></thead><tbody><tr><td>context.event_id</td><td><pre><code>202110130000000000
</code></pre></td><td>Id of the event</td></tr><tr><td>context.event_timestamp</td><td><pre><code>1639044446636
</code></pre></td><td>Timestamp of the event sending time.</td></tr><tr><td>context.device.user_agent</td><td>Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36</td><td>The browser's user agent</td></tr><tr><td>context.device.lang</td><td>fr</td><td>Browser language</td></tr><tr><td>path</td><td>/path1/path2/</td><td>Path of the current url (only on page_view)</td></tr><tr><td>referrer</td><td><a href="https://www.google.fr">https:///www.google.fr</a></td><td>Referer url (only on page_view)</td></tr><tr><td>title</td><td>My page title</td><td>Title of the current page (only on page_view)</td></tr><tr><td>url</td><td><a href="https://www.google.fr">https:///www.mywebsite.fr</a></td><td>Url of the current page</td></tr><tr><td>page.*</td><td></td><td>pages information</td></tr></tbody></table>

{% hint style="info" %}
IP Address is not collected by our libraries, but instead filled in by our servers when it receives a message for **client side events only**. Copying it from the request header containing the IP Address.
{% endhint %}


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