resend

name	resend
description	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, automations, events, viewing API request logs, 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 variable syntax) that prevent common production issues.
license	MIT
metadata	{"author":"resend","version":"3.3.3","homepage":"https://resend.com/agent-skills","source":"https://github.com/resend/resend-skills","openclaw":{"primaryEnv":"RESEND_API_KEY","requires":{"env":["RESEND_API_KEY"]},"envVars":[{"name":"RESEND_API_KEY","required":true,"description":"Resend API key for sending and receiving emails"},{"name":"RESEND_WEBHOOK_SECRET","required":false,"description":"Webhook signing secret for verifying event payloads"}],"links":{"repository":"https://github.com/resend/resend-skills","documentation":"https://resend.com/docs/resend-skill"}}}
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}]
references	["sending","receiving.md","templates.md","webhooks.md","domains.md","contacts.md","broadcasts.md","api-keys.md","logs.md","contact-properties.md","segments.md","topics.md","automations.md","events.md","installation.md","fetch-all-templates.mjs"]

Resend

Quick Send — Node.js

import { Resend } from 'resend';

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

const { data, error } = await resend.emails.send(
  {
    from: 'Acme <[e-mail]>',
    to: ['[e-mail]'],
    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

import resend
import os

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

email = resend.Emails.send({
    "from": "Acme <[e-mail]>",
    "to": ["[e-mail]"],
    "subject": "Hello World",
    : ,
}, idempotency_key=)