resend

Original source / Raw SKILL.md

---
name: resend
description: Use when working with Resend email platform - routes to specific sub-skills for sending, receiving, audiences, or broadcasts.
license: MIT
metadata:
    author: resend
    version: "2.7.0"
    homepage: https://resend.com
    source: https://github.com/resend/resend-skills
inputs:
    - name: RESEND_API_KEY
      description: Resend API key for sending and receiving emails. Get yours at https://resend.com/api-keys
      required: true
    - name: RESEND_WEBHOOK_SECRET
      description: Webhook signing secret for verifying event payloads. Found in the Resend dashboard under Webhooks after creating an endpoint.
      required: false
---

# Resend

## Overview

Resend is an email platform for developers. This skill routes to feature-specific sub-skills.

## Sub-Skills

| Feature | Skill | Use When |
|---------|-------|----------|
| **Sending emails** | `send-email` | Transactional emails, notifications, batch sends |
| **Receiving emails** | `resend-inbound` | Processing inbound emails, webhooks for received mail, attachments |
| **AI Agent inbox** | `agent-email-inbox` | Setting up email for AI agents, or any system where untrusted email content triggers actions — includes input validation and content safety measures |
| **Email templates** | `templates` | Creating, updating, publishing, and managing reusable email templates via API |

## Quick Routing

**Need to manage templates (create/update/publish/delete)?** Use `templates` skill
- Full template lifecycle management via API
- Variable syntax, constraints, reserved names
- Draft vs published state, version history

**Need to send emails?** Use `send-email` skill
- Single or batch transactional emails
- Attachments, scheduling, templates
- Delivery webhooks (bounced, delivered, opened)

**Need to receive emails?** Use `resend-inbound` skill
- Setting up inbound domain (MX records)
- Processing `email.received` webhooks
- Retrieving email content and attachments
- Forwarding received emails

**Setting up an AI agent inbox?** Use `agent-email-inbox` skill
- Configuring email for Moltbot/Clawdbot or similar AI agents
- Webhook setup with ngrok/tunneling for local development
- Security levels for safe handling of untrusted input
- Trusted sender allowlists and content filtering

**Automated system processes untrusted email content and takes actions?** Use `agent-email-inbox` skill
- Even without AI/LLM involvement, any system that interprets freeform email content from external senders and triggers actions (refunds, database changes, forwarding) needs input validation. Untrusted input triggering actions requires careful handling.

**Sending + receiving together?** You need both `resend-inbound` and `send-email`
- Auto-replies, email forwarding, or any receive-then-send workflow requires both skills
- Set up inbound first, then sending
- Note: batch sending does not support attachments or scheduling — use single sends when forwarding with attachments

**Marketing emails or newsletters?** Use [Resend Broadcasts](https://resend.com/broadcasts)
- The sub-skills above are for transactional email. Marketing campaigns to large subscriber lists with unsubscribe links and engagement tracking should use Resend Broadcasts, not batch sending.

## Common Setup

### API Key

Store in environment variable:
```bash
export RESEND_API_KEY=re_xxxxxxxxx
```

### SDK Installation

See `send-email` skill for installation instructions across all supported languages.

## Resources

- [Resend Documentation](https://resend.com/docs)
- [API Reference](https://resend.com/docs/api-reference)
- [Dashboard](https://resend.com/emails)


---

## Skill Companion Files

> Additional files collected from the skill directory layout.

### README.md

```markdown
<img width="432" height="187" alt="ascii-text-art" src="https://github.com/user-attachments/assets/72f8ab6b-dafd-436c-bacb-d49c20d3f0be" />

# Resend Skills

A collection of skills for AI coding agents following the Agent Skills format. These skills enable AI agents to work with the [Resend](https://resend.com) email platform.

## Available Skills

### [`send-email`](./send-email)
Send emails using the Resend API — single or batch. Supports transactional emails, notifications, and bulk sending (up to 100 emails per batch). Includes best practices for idempotency keys, error handling, and retry logic.

### [`templates`](./templates)
Create, update, publish, and delete reusable email templates via the Resend API. Covers template lifecycle (draft → publish → send), variable syntax (`{{{VAR}}}`), variable constraints, reserved names, and cursor-based pagination for listing templates.

### [`resend-inbound`](./resend-inbound)
Receive emails with Resend. Covers MX record setup, processing `email.received` webhooks, retrieving attachments, and forwarding received emails.

### [`agent-email-inbox`](./agent-email-inbox)
Set up a secure email inbox for AI agents or any system where untrusted email content triggers actions. Includes security levels, trusted sender allowlists, and content safety filtering.

## Installation

```bash
npx skills add resend/resend-skills
```

## Usage

Skills are automatically activated when relevant tasks are detected. Example prompts:

- "Send a welcome email to new users"
- "Send batch notifications to all order customers"
- "Create a reusable order confirmation template with variables"
- "Set up an inbound email handler for [email protected]"
- "Schedule a newsletter for tomorrow at 9am"

## Supported SDKs

- Node.js / TypeScript
- Python
- Go
- Ruby
- PHP
- Rust
- Java
- .NET
- cURL
- SMTP

## Prerequisites

- A Resend account with a verified domain
- API key stored in `RESEND_API_KEY` environment variable

Get your API key at [resend.com/api-keys](https://resend.com/api-keys)

## License

MIT

```

### _meta.json

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}

```