Mantle Resend Agent

Your AI email infrastructure assistant

Connect Resend and let the agent send transactional emails, manage audiences, create templates, and configure domains — your entire email pipeline from one conversation.

Connect your Resend See all integrations

Free plan available · No credit card · API key connect

What the Resend Agent does

Six things that simplify your email infrastructure. All work with your real Resend account.

Sends transactional emails

Send single or batch emails with HTML, plain text, or React Email templates. Track delivery status in real time.

Manages audiences and contacts

Create audiences, add contacts, manage segments, and keep your lists clean — all through natural language.

Creates email templates

Build, update, duplicate, and publish email templates. Preview them before going live.

Configures sending domains

Add, verify, and manage custom sending domains. The agent handles DNS verification for you.

Manages API keys and webhooks

Create API keys for different environments and set up webhooks to track delivery events.

Handles broadcasts

Send bulk email campaigns to your audiences. Schedule, update, and track broadcast performance.

Three steps, two minutes

Get your API key. Connect it. Start sending emails with AI.

Step 1

Get your Resend API key

Copy your API key from the Resend dashboard at resend.com/api-keys.

Step 2

Connect to Mantle

Paste your API key in Settings and the agent connects to your Resend account instantly.

Step 3

Start sending

The agent can now send emails, manage contacts, create templates, and configure domains.

Powerful workflows, out of the box

Triggered by user actions, schedules, or email events.

Welcome email on signupTrigger

When a new user signs up, the agent sends a personalized welcome email using your template.

User signs upFetch user detailsSelect templateSend email

Weekly newsletterSchedule

Every Friday, compile your latest content and send it to your subscriber audience.

Cron: Friday 10amFetch latest contentBuild newsletterSend broadcast

Payment confirmationTrigger

When a Stripe payment succeeds, send a receipt email to the customer automatically.

Stripe: payment receivedFetch order detailsRender templateSend email

Send a test emailButton

One click to send a test version of any template to yourself for review.

Select templateSet test recipientRender previewSend test

Every Resend action, available as a tool

The agent can send, manage, template, and configure — through the official Resend API.

24tools

4categories

1API

Email

6 tools

Send, retrieve, update, and cancel transactional emails.

Send email

Send batch emails

Retrieve email

Update email

Cancel email

List emails

Audiences & contacts

6 tools

Manage audiences, contacts, segments, and topics.

Create audience

List audiences

Create contact

Update contact

List contacts

Manage segments

Templates

6 tools

Create, update, duplicate, and publish email templates.

Create template

Get template

Update template

Duplicate template

Publish template

List templates

Domains & config

6 tools

Manage sending domains, API keys, and webhooks.

Create domain

Verify domain

List domains

Create API key

Create webhook

List webhooks

Your email, your rules

Domain verification and API key management. Send with confidence.

Domain verification

Only send from domains you have verified. No spoofing, no surprises.

Scoped API keys

Create separate API keys for production and development with different permissions.

Pause in one click

Toggle the agent off from the dashboard. All email sending stops immediately.

Revoke anytime

Delete the API key from Resend to instantly cut all sending access.

Questions, answered

Resend is a modern email API for developers. It handles email delivery, templates, audience management, and analytics — with a great developer experience.

Yes. Resend supports both transactional emails (receipts, notifications) and broadcasts (newsletters, campaigns) to your audiences.

Yes. Resend works seamlessly with React Email for building beautiful, responsive email templates in JSX.

Add your domain, then add the DNS records Resend provides. The agent can check verification status for you.

You can start for free — no credit card needed. The Free plan includes a usage allowance that refills every 5 hours. Paid plans unlock more usage, every AI model, and team features.