# Wix

Settings › Custom Code › Add Custom Code: paste the snippet, then choose **All pages**, **Load code once** and **Head**. Publish.

This needs a Premium plan and a connected domain.

## Velo option (needs a public key)

Velo can't read `window.doubleagent`. Instead, an Embed HTML element (id `daFrame`, hidden) posts a token to your page code:

```html
  window.doubleagent=window.doubleagent||{q:[],push(){this.q.push(arguments)}};
<script async src="https://cdn.doubleagent.so/v1/doubleagent.js" data-key="pk_live_xxx" data-profile="leadgen"></script>
<script>
  addEventListener('message', async (e) => {
    if (e.data !== 'da:token') return;
    parent.postMessage({ daToken: await doubleagent.getToken('lead_form').catch(() => '') }, '*');
  });
</script>
```

Your page code posts `da:token` with `$w('#daFrame').postMessage`, and a backend web module verifies the reply with `POST /v1/verify`.