Is io.github.Alexendros/proton-mail-mcp safe to use?

io.github.Alexendros/proton-mail-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.

How do I install io.github.Alexendros/proton-mail-mcp?

io.github.Alexendros/proton-mail-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.Alexendros/proton-mail-mcp do?

io.github.Alexendros/proton-mail-mcp provides 13 tools: proton_list_folders, proton_create_folder, proton_mailbox_status, proton_list_emails, proton_search_emails and 8 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.Alexendros/proton-mail-mcp?

io.github.Alexendros/proton-mail-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is io.github.Alexendros/proton-mail-mcp actively maintained?

io.github.Alexendros/proton-mail-mcp is actively maintained — last commit was 8 days ago.

io.github.Alexendros/proton-mail-mcp

npm

Proton Mail MCP via Bridge (IMAP/SMTP) · 13 tools · dual transport stdio + HTTP.

12.7M/wk 13 tools GitHub npm

No known CVEs

No license

Actively maintained

Last commit 8d ago

Works with most clients

Transport: stdio, http

13 tools · ~747 tok

Grade B · 0.4% of 200K ctx

Edit this pageView history

Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-alexendros-proton-mail-mcp": {
      "args": [
        "-y",
        "npm"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-alexendros-proton-mail-mcp)](https://mcppedia.org/s/io-github-alexendros-proton-mail-mcp)

Read me

What io.github.Alexendros/proton-mail-mcp does

Proton Mail MCP via Bridge (IMAP/SMTP) · 13 tools · dual transport stdio + HTTP.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y 'npm' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

8 fixed

CVE-2022-29244low · fixedCVSS 3.1

Packing does not respect root-level ignore files in workspaces

### Impact `npm pack` ignores root-level `.gitignore` & `.npmignore` file exclusion directives when run in a workspace or with a workspace flag (ie. `--workspaces`, `--workspace=<name>`). Anyone who has run `npm pack` or `npm publish` with workspaces, as of [v7.9.0](https://github.com/npm/cli/releases/tag/v7.9.0) & [v7.13.0](https://github.com/npm/cli/releases/tag/v7.13.0) respectively, may be affected and have published files into the npm registry they did not intend to include. ### Patch - Up

Affected: >= 7.9.0Fixed in 8.11.0source →

CVE-2018-7408low · fixedCVSS 3

Incorrect Permission Assignment for Critical Resource in NPM

An issue was discovered in an npm 5.7.0 2018-02-21 pre-release (marked as "next: 5.7.0" and therefore automatically installed by an "npm upgrade -g npm" command, and also announced in the vendor's blog without mention of pre-release status). It might allow local users to bypass intended filesystem access restrictions because ownerships of /etc and /usr directories are being changed unexpectedly, related to a "correctMkdir" issue.

Affected: >= 0Fixed in 5.7.1source →

CVE-2013-4116info · fixed

Local Privilege Escalation in npm

Affected versions of `npm` use predictable temporary file names during archive unpacking. If an attacker can create a symbolic link at the location of one of these temporary file names, the attacker can arbitrarily write to any file that the user which owns the `npm` process has permission to write to, potentially resulting in local privilege escalation. ## Recommendation Update to version 1.3.3 or later.

Affected: >= 0Fixed in 1.3.3source →

CVE-2020-15095low · fixedCVSS 3.1

npm CLI exposing sensitive information through logs

Versions of the npm CLI prior to 6.14.6 are vulnerable to an information exposure vulnerability through log files. The CLI supports URLs like `<protocol>://[<user>[:<password>]@]<hostname>[:<port>][:][/]<path>`. The password value is not redacted and is printed to stdout and also to any generated log files.

Affected: >= 0Fixed in 6.14.6source →

CVE-2019-16777low · fixedCVSS 3.1

npm Vulnerable to Global node_modules Binary Overwrite

Versions of the npm CLI prior to 6.13.4 are vulnerable to a Global node_modules Binary Overwrite. It fails to prevent existing globally-installed binaries to be overwritten by other package installations. For example, if a package was installed globally and created a `serve` binary, any subsequent installs of packages that also create a `serve` binary would overwrite the first binary. This will not overwrite system binaries but only binaries put into the global node_modules directory. This b

Affected: >= 0Fixed in 6.13.4source →

Inventory

Tools (13)

Click any tool to inspect its schema.

~747 tokens total

Help improve this page

This server is missing a description.If you've used it, help the community.

Add information

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.Alexendros/proton-mail-mcp safe to use?: io.github.Alexendros/proton-mail-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.Alexendros/proton-mail-mcp?: io.github.Alexendros/proton-mail-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.Alexendros/proton-mail-mcp do?: io.github.Alexendros/proton-mail-mcp provides 13 tools: proton_list_folders, proton_create_folder, proton_mailbox_status, proton_list_emails, proton_search_emails and 8 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.Alexendros/proton-mail-mcp?: io.github.Alexendros/proton-mail-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is io.github.Alexendros/proton-mail-mcp actively maintained?: io.github.Alexendros/proton-mail-mcp is actively maintained — last commit was 8 days ago.

Similar servers

Others in communication

View all →

Mac_messages_mcp95

An MCP server that securely interfaces with your iMessage database via the Model Context Protocol (MCP), allowing LLMs to query and analyze iMessage conversations. It includes robust phone number validation, attachment processing, contact management, group chat handling, and full support for sending and receiving messages.

279 4

Mcp_agent_mail94

Asynchronous coordination layer for AI coding agents: identities, inboxes, searchable threads, and advisory file leases over FastMCP + Git + SQLite

2.0k 6

Autotask Mcp93

MCP server for Kaseya Autotask PSA — 39 tools for companies, tickets, projects, time entries, and more

36 7

Agenticmail92

Email & SMS infrastructure for AI agents — send and receive real email and text messages programmatically

126 7

MCP Security Weekly

Get CVE alerts and security updates for io.github.Alexendros/proton-mail-mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-alexendros-proton-mail-mcp": {
      "args": [
        "-y",
        "npm"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-alexendros-proton-mail-mcp)](https://mcppedia.org/s/io-github-alexendros-proton-mail-mcp)

Read me

What io.github.Alexendros/proton-mail-mcp does

Proton Mail MCP via Bridge (IMAP/SMTP) · 13 tools · dual transport stdio + HTTP.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y 'npm' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

Proton Mail MCP

Servidor MCP (Model Context Protocol) para Proton Mail vía Proton Mail Bridge. Expone la bandeja — lectura, búsqueda, envío, mover, etiquetar, borrar — a cualquier cliente MCP con tipado estricto, anotaciones de seguridad y doble transporte (stdio y streamable HTTP).

La garantía E2E de Proton se preserva: el cifrado y descifrado ocurren en Bridge, una máquina que controlas tú. Ni los servidores de Anthropic ni terceros ven tu correo descifrado — sólo el agente al que tú autorizas.

Por qué existe este proyecto

Hay dos formas comunes de darle "ojos sobre el correo" a un asistente como Claude:

Copiar y pegar bloques de correo dentro del chat. Trabajoso, frágil y sin trazabilidad.
OAuth contra un proveedor SaaS (Gmail API, Microsoft Graph). Funciona pero expone los datos al proveedor y deja el agente fuera de una cuenta Proton Mail, que es E2E y no tiene API pública.

Este MCP resuelve ambos problemas sobre Proton Mail:

Interfaz MCP estándar. Cualquier cliente compatible (Claude Code CLI, Claude Routines, SDK cliente en tu backend) puede llamar a las 13 tools sin implementar IMAP/SMTP.
Autohospedado. El binario corre donde tú decidas — laptop, VPS, contenedor. Bridge hace la criptografía en el mismo host y nunca expone el vault a la red pública.
Dual transport. stdio para cliente local (Claude Code en la CLI), streamable HTTP con bearer auth + allowlist de origen para clientes remotos (Routines, dashboards propios).

Este repositorio también sirve como muestra pública de craft: tests automatizados, hardening por capas, CI/CD completo y modelo de amenazas explícito — no es un boilerplate, es una pieza de producción.

Estado actual

Pieza	Estado
Smoke `stdio`: `initialize` + `tools/list` responden con las 13 tools	verificado
Typecheck strict (`tsc --noEmit`) sobre todo `src/` y `tests/`	verde
Suite Vitest: 4 archivos, 39 tests (auth · config · smtp-helpers · http-transport)	verde
Build `tsc` a `dist/` + smoke integrado en `npm run smoke`	verde
Imagen Docker multi-stage para el MCP	construye
Imagen extendida `Dockerfile.bridge` (libfido2, dbus, pass, libGL, credential helpers)	construye
CI GitHub Actions (matrix Node 20/22, typecheck, test, build, smoke, `npm audit`, CodeQL)	configurado
Release workflow a `ghcr.io/iniciativas-alexendros/protonmail-mcp` en push a `main`	configurado
Despliegue Dokploy en `https://protonmail.alexendros.me/mcp`	en progreso

Arquitectura

┌─────────────────────────────────────────────────────────────────────────┐
│                            CONSUMIDORES MCP                             │
│                                                                         │
│   Claude Code CLI          Claude Routines         Backend propio       │
│   (stdio, local)           (HTTP, claude.ai)       (HTTP, tu código)    │
│         │                         │                       │             │
└─────────┼─────────────────────────┼───────────────────────┼─────────────┘
          │ JSON

... [View full README on GitHub](https://github.com/alexendros/proton-mail-mcp#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

85/100across 5 weighted dimensions

How we score →

0255075100

−15

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

8 fixed

CVE-2022-29244low · fixedCVSS 3.1

Packing does not respect root-level ignore files in workspaces

Affected: >= 7.9.0Fixed in 8.11.0source →

CVE-2018-7408low · fixedCVSS 3

Incorrect Permission Assignment for Critical Resource in NPM

Affected: >= 0Fixed in 5.7.1source →

CVE-2013-4116info · fixed

Local Privilege Escalation in npm

Affected: >= 0Fixed in 1.3.3source →

CVE-2020-15095low · fixedCVSS 3.1

npm CLI exposing sensitive information through logs

Affected: >= 0Fixed in 6.14.6source →

CVE-2019-16777low · fixedCVSS 3.1

npm Vulnerable to Global node_modules Binary Overwrite

Affected: >= 0Fixed in 6.13.4source →

Inventory

Tools (13)

Click any tool to inspect its schema.

~747 tokens total

Help improve this page

This server is missing a description.If you've used it, help the community.

Add information

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.Alexendros/proton-mail-mcp safe to use?: io.github.Alexendros/proton-mail-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments.
How do I install io.github.Alexendros/proton-mail-mcp?: io.github.Alexendros/proton-mail-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.Alexendros/proton-mail-mcp do?: io.github.Alexendros/proton-mail-mcp provides 13 tools: proton_list_folders, proton_create_folder, proton_mailbox_status, proton_list_emails, proton_search_emails and 8 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.Alexendros/proton-mail-mcp?: io.github.Alexendros/proton-mail-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is io.github.Alexendros/proton-mail-mcp actively maintained?: io.github.Alexendros/proton-mail-mcp is actively maintained — last commit was 8 days ago.