Agent Email Inbox
Use when building any system where email content triggers actions — AI agent inboxes, automated support handlers, email-to-task pipelines, or any workflow processing untrusted inbound email. Always use this skill when the user wants to receive emails and act on them programmatically, even if they don't mention "agent" — the skill contains critical security patterns (sender allowlists, content filtering, sandboxed processing) that prevent untrusted email from controlling your system.
Install
npx skills add resend/resend-skills --skill agent-email-inboxgit clone --depth 1 https://github.com/resend/resend-skills.git /tmp/resend-skills
mkdir -p ~/.claude/skills
cp -r /tmp/resend-skills/skills/agent-email-inbox ~/.claude/skills/agent-email-inboxPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# AI Agent Email Inbox ## Overview This skill covers setting up a secure email inbox that allows your application or AI agent to receive and respond to emails, with content safety measures in place. **Core principle:** An AI agent's inbox receives untrusted input. Security configuration is important to handle this safely. The skill builds the agent on a Resend **Inbox**. An inbox groups email into threads, and your agent replies inside the thread with one call. Resend sets the recipients and the threading headers. If the user has no custom domain, or their plan has no inbox available, use [Receiving without an inbox](#receiving-without-an-inbox) instead. The security levels are the same for both. ### Why Webhook-Based Receiving? Resend uses webhooks for inbound email, meaning your agent is notified **instantly** when an email arrives. This is valuable for agents because: - **Real-time responsiveness** — React to emails within seconds, not minutes - **No polling overhead** — No cron jobs checking "any new mail?" repeatedly - **Event-driven architecture** — Your agent only wakes up when there's actually something to process - **Lower API costs** — No wasted calls checking empty inboxes ## Architecture
Details
- Skill name
agent-email-inbox- Repository
- resend/resend-skills
- Path
skills/agent-email-inbox/SKILL.md- License
- MIT
- Repo updated
- 28 October 2026
FAQ
What does the Agent Email Inbox skill do?
Use when building any system where email content triggers actions — AI agent inboxes, automated support handlers, email-to-task pipelines, or any workflow processing untrusted inbound email. Always use this skill when the user wants to receive emails and act on them programmatically, even if they don't mention "agent" — the skill contains critical security patterns (sender allowlists, content filtering, sandboxed processing) that prevent untrusted email from controlling your system.
How do I install the Agent Email Inbox skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add resend/resend-skills --skill agent-email-inbox. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Agent Email Inbox 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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