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

Create an API key in Resend under API Keys and paste it into Cargo when creating the connector.

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

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

---

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}}

Template variable keys must match the variables expected by your published Resend template.