> For the complete documentation index, see [llms.txt](https://docs.growsurf.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.growsurf.com/integrations/resend/tutorials.md).

# Tutorials

Add GrowSurf referral links and progress data to Resend Broadcasts.

Once GrowSurf syncs participants to Resend, you can insert their referral link and progress directly into a Broadcast. Resend uses triple braces for Contact Properties.

## Display the participant's referral link

Use the synced `grsf_share_url` property as the link and visible text:

```html
<p>Give your friends a reason to join.</p>
<p>Copy and paste your unique referral link to share:</p>
<p>
  <a href="{{{contact.grsf_share_url}}}">{{{contact.grsf_share_url}}}</a>
</p>
```

## Display a link to your program referral portal

Replace `YOUR_PROGRAM_ID` with your GrowSurf Program ID. If you use a custom Referral Portal domain, replace the `https://grow.surf/YOUR_PROGRAM_ID` portion with that URL.

```html
<a href="https://grow.surf/YOUR_PROGRAM_ID?grsf_email={{{contact.email}}}&grsf_first_name={{{contact.first_name}}}&grsf_last_name={{{contact.last_name}}}">
  View your referral progress
</a>
```

## Show referral progress

```html
<p>You have made {{{contact.grsf_total_referral_count|0}}} referrals so far.</p>
```

{% hint style="info" %}
Resend supports fallback values after the `|` character. See Resend's [Broadcast guide](https://resend.com/docs/dashboard/broadcasts/introduction) for the syntax.
{% endhint %}


---

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