e2a — email for AI agents MCP server

The open-source email API for applications and AI agents.

Send transactional email and give agents real two-way inboxes, with people in control.

Try hosted e2a — start free →

We run the email infrastructure. You connect your app or agent.

Self-host with Docker · Documentation · Agent quickstart · Examples

A Token Canopy product · Apache 2.0

Using a coding agent? Paste this prompt into its chat:

Connect this coding agent to hosted e2a MCP at https://api.e2a.dev/mcp and help me sign in via browser OAuth.

Supports coding agents with remote MCP and browser OAuth. Client setup guide.

Choose how to start

• Hosted — recommended for getting started. Sign up at e2a.dev. Includes the shared agents.e2a.dev domain for instant slug-based onboarding (no DNS setup), a dashboard, the hosted MCP server, and managed deliverability.
• Self-host — run your own infrastructure. See Self-host (Docker) and Deployment. Nearly every feature works the same (content screening is currently self-host-only — see the note below); the shared-domain slug shortcut just needs you to point a mail domain at your relay and set shared_domain in config.yaml.

For application email, start with the transactional email guide. For coding agents, use the prompt above or the setup instructions below.

Quickstart

Connect your agent to hosted e2a

Give your AI agent an inbox directly. Install the e2a plugin — it registers the hosted MCP server and an operate-well skill, so your agent can send, receive, reply in-thread, and hold mail for review out of the box. On first tool use it runs an OAuth flow in your browser — no API key to paste.

Claude Code

claude plugin marketplace add tokencanopy/e2a
claude plugin install e2a@e2a

Codex

codex plugin marketplace add tokencanopy/e2a

Then launch codex, run /plugins, and install e2a.

Cursor — add the MCP server directly. Put this in .cursor/mcp.json (or ~/.cursor/mcp.json to get it in every project); Cursor opens your browser to authorize on first use, no API key to paste:

{
  "mcpServers": {
    "e2a": { "url": "https://api.e2a.dev/mcp" }
  }
}

Other MCP clients (Zed, Goose, Windsurf, Claude Desktop, raw mcp.json) — point straight at https://api.e2a.dev/mcp; ready-to-paste configs are in plugins/e2a/clients/. See plugins/e2a/README.md for the full per-client guide.

Shortened. The full README is on GitHub.