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":"2.5.0","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

Resend is an email platform for developers. This skill routes to feature-specific 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 security measures against prompt injection

Need to send emails? Use send-email skill

Need to receive emails? Use resend-inbound skill

Setting up an AI agent inbox? Use agent-email-inbox skill

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 security. Untrusted input triggering actions = attack vector.

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

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.

Store in environment variable:

export RESEND_API_KEY=re_xxxxxxxxx

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

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":"2.5.0","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}]