MailKite for Claude Code

The official MailKite plugin for Claude Code. Connect your agent to MailKite — inbound email → webhook, plus a send API — with one command and a browser sign-in. No API key to copy, no local process to run.

Install

/plugin marketplace add mailkite/claude-code
/plugin install mailkite@mailkite

Then authorize the connection:

/mcp

Pick mailkite → Authenticate; a browser opens, you sign in to MailKite, and the server flips to ✓ Connected. That's it — the tools below are now available to your agent.

What you get

• Hosted MCP server (https://mcp.mailkite.dev/mcp) with OAuth 2.1 (PKCE) — the plugin registers it for you; no key in your config.
• 17 tools: send mail, list/create/verify domains, manage catch-all webhooks, create inbound routes, list/read messages, retry deliveries, and verify webhook signatures (locally, no network).
• Slash commands:
  • /mailkite:send-test [to] — send a test email from a verified domain.
  • /mailkite:test-inbound [domain] — fire a signed test event at a domain's webhook.
  • /mailkite:debug-webhook [message-id] — diagnose a failing delivery and propose a fix.
• The MailKite skill — playbook + reference the agent loads on demand.

Agent skill (standalone)

The MailKite agent skill also ships on its own — a SKILL.md playbook plus reference files that drive the whole email lifecycle (account → domain → DNS → webhook → send → confirm inbound). Use it in Claude Code or claude.ai without the plugin.

Easiest — let your agent install it. Paste this to Claude:

Download the MailKite agent skill from https://github.com/mailkite/claude-code/releases/latest/download/mailkite.zip and unzip it into ~/.claude/skills/ (user-wide) or .claude/skills/ (this project), then load it.

Or grab it yourself. Direct release download: https://github.com/mailkite/claude-code/releases/latest/download/mailkite.zip

# Claude Code — user-wide
curl -L https://github.com/mailkite/claude-code/releases/latest/download/mailkite.zip -o mailkite.zip
unzip mailkite.zip -d ~/.claude/skills/

# …or scope it to one project
unzip mailkite.zip -d .claude/skills/

For claude.ai / Claude Desktop: download the zip above, then Settings → Capabilities → Skills → Upload skill and drop it in.

Source: skills/mailkite.

Other ways to connect

This plugin is the easiest path. You can also:

• Add the remote server directly (no plugin):

  claude mcp add --transport http mailkite https://mcp.mailkite.dev/mcp
  # then: /mcp → Authenticate

  Or skip OAuth with a static key (headless/CI):

  claude mcp add --transport http mailkite https://mcp.mailkite.dev/mcp \
    --header "Authorization: Bearer mk_live_…"

• Run the local server (@mailkite/mcp) when you want a static key, offline use, or a custom base URL. See https://mailkite.dev/docs/ai-agents.

Links

• Docs: https://mailkite.dev/docs/ai-agents
• Dashboard / API keys: https://app.mailkite.dev/api-keys

MIT © MailKite