Resend

Use when working with the Resend email API — sending transactional emails (single or batch), receiving inbound emails via webhooks, managing email templates, tracking delivery events, managing domains, contacts, broadcasts, webhooks, API keys, inboxes (threads, labels, drafts, replies), automations, events, viewing API request logs, checking account usage and quotas, or setting up the Resend SDK. Always use this skill when the user mentions Resend, even for simple tasks like "send an email with Resend" — the skill contains critical gotchas (idempotency keys, webhook verification, template vari

208 stars 34 forksProductivity & NotesOfficial

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add resend/resend-skills --skill resend

Manual install

git clone --depth 1 https://github.com/resend/resend-skills.git /tmp/resend-skills
mkdir -p ~/.claude/skills
cp -r /tmp/resend-skills/skills/resend ~/.claude/skills/resend

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# Resend

## Quick Send — Node.js

```typescript
import { Resend } from 'resend';

const resend = new Resend(process.env.RESEND_API_KEY);

const { data, error } = await resend.emails.send(
  {
    from: 'Acme <onboarding@resend.dev>',
    to: ['delivered@resend.dev'],
    subject: 'Hello World',
    html: '<p>Email body here</p>',
  },
  { idempotencyKey: `welcome-email/${userId}` }
);

if (error) {
  console.error('Failed:', error.message);
  return;
}
console.log('Sent:', data.id);
```

**Key gotcha:** The Resend Node.js SDK does NOT throw exceptions — it returns `{ data, error }`. Always check `error` explicitly instead of using try/catch for API errors.

## Quick Send — Python

```python
import resend
import os

resend.api_key = os.environ["RESEND_API_KEY"]

email = resend.Emails.send({
    "from": "Acme <onboarding@resend.dev>",
    "to": ["delivered@resend.dev"],
    "subject": "Hello World",
    "html": "<p>Email body here</p>",
}, idempotency_key=f"welcome-email/{user_id}")
```

### Single vs Batch Decision

| Choose | When |
|--------|------|
| **Single** (`POST /emails`) | 1 email, needs attachments, needs scheduling |
| **Batch** (`POST /emails/batch`) | 2-100 distinct emails, no attachments, no scheduling |

Batch is atomic — if one email fails validation, the entire batch fails. Always validate before sending. Batch does NOT support attachments or `scheduled_at`.

### Idempotency Keys (Critical for Retries)

Read the full skill on GitHub

Details

Skill name: resend
Repository: resend/resend-skills
Path: skills/resend/SKILL.md
License: MIT
Repo updated: 28 October 2026
Listed in: heilcheng/awesome-agent-skills, VoltAgent/awesome-agent-skills

FAQ

What does the Resend skill do?

How do I install the Resend skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add resend/resend-skills --skill resend. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Resend popular?

It lives in resend/resend-skills, which has 208 GitHub stars and 34 forks, and is included in 2 curated skill lists.

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