# Apex Class

You can know more about Apex class [here](https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_dev_guide.htm). To Create an Apex Class

* Click on settings icon

![](/files/-MXYie9g0exx2OM2U_Jc)

* Then click on Setup option from the dropdown

![](/files/-MXYj0n9LyhiRAM_Qxns)

* Search for Apex Classes option and click on it

![](/files/-MXXfqhyorewCdeU82VB)

* Click on New button

![](/files/-MXYjUnecx65udp3Uzm8)

* Copy and paste the below code snippet. The code snippet checks the Salesforce data and if there is any change/update in the customer information then it updates to CustomFit

```
public class CustomFitWebHook {
    
  public static String jsonContent(List<Object> triggerNew, List<Object> triggerOld) {
    String newObjects = '[]';
    if (triggerNew != null) {
      newObjects = JSON.serialize(triggerNew);
    }
    String oldObjects = '[]';
    if (triggerOld != null) {
      oldObjects = JSON.serialize(triggerOld);
    }
    String userId = JSON.serialize(UserInfo.getUserId());
    String instanceURL = JSON.serialize(URL.getOrgDomainUrl().toExternalForm());


    String content = '{"new": ' + newObjects + ', "old": ' + oldObjects + ', "userId": ' + userId + ', "instanceURL": ' + instanceURL + '}';
    return content;
  }
  @future(callout=true) public static void callout(String content) {
    Http h = new Http();
    HttpRequest req = new HttpRequest();
    req.setEndpoint('https://api.customfit.ai/v1/salesforce/webhooks');
    req.setMethod('POST');
    req.setHeader('Content-Type', 'application/json');
    req.setBody(content);
    h.send(req);
  }
}

```

* Click on Save button

![](/files/-MXYk2mqj5rtSUwrbbwh)


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