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

# Resend

> Send email and manage domains, audiences, and contacts with Resend

## At a glance

* **Availability**: Experimental ([how to enable](/cloud/integrations)).
* **Auth**: API key.
* **Connection**: The key comes from `RESEND_API_KEY`.
* **Docs**: [https://resend.com/docs/api-reference/introduction](https://resend.com/docs/api-reference/introduction)

## Credentials

Set these per environment. See [Connect an integration](/cloud/integrations).

| Variable         | Required | Description                                                                                        |
| ---------------- | -------- | -------------------------------------------------------------------------------------------------- |
| `RESEND_API_KEY` | Yes      | Resend API key (starts with re\_) [Docs](https://resend.com/docs/dashboard/api-keys/introduction). |

## Setup

1. **Sign in to Resend**: Go to [https://resend.com](https://resend.com) and sign in. The free tier is sufficient for testing.
2. **Verify a domain (or use onboarding sender)**: Add and verify a sending domain under [https://resend.com/domains](https://resend.com/domains). For quick tests you can send from [onboarding@resend.dev](mailto:onboarding@resend.dev) to your own account email.
3. **Create an API key**: Open [https://resend.com/api-keys](https://resend.com/api-keys) and create a key with Full Access (Sending Access alone cannot read domains/audiences).
4. **Set the environment variable**: Add the key to your .env as RESEND\_API\_KEY=re\_...
5. **Verify access**: Run List Domains to confirm the key works, then send a test email to yourself.

* Resend authenticates with 'Authorization: Bearer re\_...'
* Audiences and contacts power Broadcasts; transactional sending only requires a verified domain

Provider API reference: [https://resend.com/docs/api-reference/introduction](https://resend.com/docs/api-reference/introduction)

## Tools

| Tool           | Access | Description                                        |
| -------------- | ------ | -------------------------------------------------- |
| Send Email     | Write  | Send an email                                      |
| Get Email      | Read   | Get a sent email and its delivery status by ID     |
| List Domains   | Read   | List sending domains and their verification status |
| List Audiences | Read   | List audiences (contact groups)                    |
| List Contacts  | Read   | List contacts in an audience                       |
| Create Contact | Write  | Add a contact to an audience                       |

## Example prompts

* Send an email via Resend with a subject, recipient, and HTML body.
* List my Resend domains and tell me which ones are verified for sending.