Ecc MCP Server

A Model Context Protocol (MCP) server that lets AI assistants read, write and manage your email, calendar and contacts - across Google, Microsoft 365/Outlook, Zoho, and any IMAP/SMTP, CalDAV or CardDAV account - from a single interface. It runs locally over stdio via the published package.

People who work with Encryption and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-10 · ★ 3 · #40 OF 90 MAINTAINED EMAIL · VERIFIED 2026-09-18

MIT · TypeScript servers · how we verify → /methodology

01 · Install Ecc

before you install - you'll need

Set MCP_ENCRYPTION_KEY before connecting.

Claude Code

claude mcp add karljsamuel-mcp-ecc -- npx -y mcp-ecc

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "karljsamuel-mcp-ecc": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-ecc"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package mcp-ecc - unscoped; check the name against the project README before installing

registry namespace io.github.karljsamuel is GitHub-verified and matches the repo owner

03 · What Ecc can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.6.0 · 2026-09-10

v0.6.0 · Added · Complete accounts.sync across mail, calendars, and contacts with per-domain results and errors. · Live provider health checks at startup, periodically, and on demand. · Versioned shared SQLite and…

v0.5.1 · 2026-09-08

v0.5.1 · Stable patch release. · Live provider health checks · SQLite and D1 schema migrations · Persistent sessions · Provider-aware OAuth flows · Admin UI OAuth client management · MCP account synchronisation and…

04 · Who maintains Ecc

mcp-ecc is maintained by karljsamuel. It's the only MCP server we track from this author; the repo dates to Jul 2026.

05 · Facts

repository: github.com/karljsamuel/mcp-ecc
category: email - ranked #40 of 90 actively-maintained email servers as of 2026-09-18.
release cadence: 2 releases in the last 90 days (latest 2026-09-10)
registry: io.github.karljsamuel/mcp-ecc (active, first published 2026-09-01 · 4 versions)
packages: npm:mcp-ecc

06 · Ecc FAQ

What is Ecc?

Is Ecc still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-10 and it shipped 2 releases in the last 90 days. We re-verify nightly.

How do I install Ecc?

Run `npx -y mcp-ecc`. The README documents one environment variable (MCP_ENCRYPTION_KEY) to set first. Set MCP_ENCRYPTION_KEY before connecting. You can also paste the ready-made client config above.

Does Ecc run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Ecc

Alternatives to Ecc

Maintained email servers if Ecc isn't the fit.

More email MCP servers · Che Apple Mail MCP · Sanctions AI · Mail Fathom · Outlook Assistant · Inbox Check - Email Deliverability Test

More TypeScript MCP servers · Thoughtbox · Kastell · Weboperator · Anybrowse · Martin Loop · see all