resend-integration-skills_skill

Overview

This skill integrates the Resend email service with AI agents via the Model Context Protocol (MCP) so agents like Claude Desktop, GitHub Copilot, and Cursor can send transactional and marketing emails. It includes setup guidance for running the Resend MCP server, configuring API keys and senders, and using AI to automate email workflows. The skill supports plain text and HTML, scheduling, broadcasts, and audience management.

How this skill works

You run a local Resend MCP server (Node.js 20+) that exposes Resend functionality as MCP tools. Agents talk to that server via MCP configuration (command, stdio, or HTTP) to send, schedule, or broadcast emails, manage audiences, and set headers like From and Reply-To. API keys and sender addresses are supplied via environment variables or secret stores so agents can operate securely and autonomously when allowed.

When to use it

• Automating transactional emails from AI agents (notifications, confirmations).
• Sending marketing broadcasts or segment-based campaigns via an AI-driven workflow.
• Integrating email sends into code-focused agent tasks (Copilot repository workflows).
• Testing and iterating email templates or HTML content with AI assistance.
• Scheduling reminders or follow-ups generated by an agent.

Best practices

• Run the MCP server on Node.js 20+ and keep the build executable path absolute for agent configs.
• Store RESEND_API_KEY in environment secrets (COPILOT_MCP_ prefix for GitHub Copilot) and never commit keys.
• Allowlist only required MCP tools (e.g., send_email, schedule_email) when enabling Copilot tools.
• Verify custom domains in Resend and set SENDER_EMAIL_ADDRESS for production sends.
• Test flows with a developer email and plain-text alternatives before broad broadcasts.

Example use cases

• Use Copilot Coding Agent to send a deployment notification email to the engineering team when a PR merges.
• Have Claude Desktop draft and send a personalized onboarding sequence using the audience broadcast tool.
• Use Cursor Agent mode to select an email.md file and command the agent to send a test email via Resend MCP.
• Schedule a reminder email for tomorrow at 9 AM to the project team using agent-specified datetime.
• Extract top users from a CSV and let the agent send personalized thank-you emails with usage stats.