> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getcargo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Resend

> Connect Resend to send transactional emails from Cargo workflows.

Resend is an email API for transactional email delivery. Cargo's native Resend integration lets you send template-based or raw HTML/text emails directly from your Tools, Plays, and Agents.

## How to set up Resend

To connect Resend, you need an API key from your Resend account.

### Connection details

| Field       | Description         |
| ----------- | ------------------- |
| **API Key** | Your Resend API key |

<Tip>Create an API key in Resend under **API Keys** and paste it into Cargo when creating the connector.</Tip>

Once the connector is created, you can:

* **Use Resend in workflows** — Choose **Resend** from the node catalog in a **Play**, **Tool**, or **Agent**.

***

## Resend actions

### Send email

Send an email with Resend using either:

* a **published template** with variables, or
* **raw HTML/text** content.

**Configuration**

| Field                  | Description                                                 |
| ---------------------- | ----------------------------------------------------------- |
| **From email**         | Sender email address                                        |
| **From name**          | Optional sender display name                                |
| **To email**           | Recipient email address                                     |
| **Subject**            | Required for HTML/text mode, optional when using a template |
| **Template**           | Optional template ID or alias                               |
| **Template variables** | Optional key-value mappings used with templates             |
| **HTML**               | Optional HTML body (must not be set with Template)          |
| **Text**               | Optional text body (must not be set with Template)          |
| **Reply to**           | Optional reply-to email address                             |

<Info>
  If **Template** is provided, do not send **HTML** or **Text** in the same action.
  Resend rejects that payload combination.
</Info>

***

## Template variables

When using templates, pass variables as key-value pairs in **Template variables**.

### Example

| Key            | Value                        |
| -------------- | ---------------------------- |
| `first_name`   | `{{contact.firstName}}`      |
| `company_name` | `{{account.name}}`           |
| `cta_url`      | `{{tool.output.meetingUrl}}` |

<Warning>
  Template variable keys must match the variables expected by your published
  Resend template.
</Warning>