proton-safe

proton-safe is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from fbossiere/proton-safe-mcp. Its token cost is not measured, scanned A, original, MIT.

A local connector for Proton Mail that lets an agent prepare drafts and stage attachments without sending messages. It runs from a Python package and is designed to work with different agent clients.

In plain words
What is it for?
Preparing Proton Mail drafts and handling attachments before review. It also provides limits and temporary storage settings for draft and upload data.
Why use it?
It keeps email preparation local and draft-only, reducing the risk of sending a message or exposing an attachment by mistake.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Written for no agent in particular: it speaks MCP, so any client can run it. Also seen: listed in a Claude config.

Good fit Preparing Proton Mail drafts and handling attachments before review. It also provides limits and temporary storage settings for draft and upload data.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/fbossiere/proton-safe-mcp

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for proton-safe

README.md
[![agentmods](https://agentmods.dev/badge/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe/github.svg)](https://agentmods.dev/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe)
Your own site
<a href="https://agentmods.dev/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe"><img src="https://agentmods.dev/badge/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for proton-safe

Your own site · 80×15
<a href="https://agentmods.dev/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe"><img src="https://agentmods.dev/badge/mcp/fbossiere/proton-safe-mcp/proton-safe-proton-safe.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits How audits are shown
Origin original No closer match found in the catalogue.
Security

Grade A, and why

proton-safe scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/proton-safe/.mcp.json · 28 lines

What it actually says

{
  "proton-safe": {
    "command": "uvx",
    "args": [
      "--from",
      "proton-safe-mcp==2.0.3",
      "proton-safe-mcp",
      "serve"
    ],
    "env_vars": [
      "DBUS_SESSION_BUS_ADDRESS",
      "HOME",
      "PATH",
      "PROTON_BRIDGE_ALIASES",
      "PROTON_BRIDGE_USER",
      "PROTON_IMAP_PORT",
      "PROTON_MCP_MAX_ATTACHMENT_BYTES",
      "PROTON_MCP_MAX_RECEIVED_ATTACHMENT_BYTES",
      "PROTON_MCP_MAX_BODY_CHARS",
      "PROTON_MCP_MAX_CHUNK_BYTES",
      "PROTON_MCP_STATE_DIR",
      "PROTON_MCP_UPLOAD_TTL_SECONDS",
      "XDG_RUNTIME_DIR"
    ],
    "startup_timeout_sec": 30,
    "tool_timeout_sec": 120
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago Changed b337b96dfd54
  2. 7d ago Changed · +1 lines 4f881ac6b714
  3. 11d ago First seen · 27 lines scan A a697e7aca334

Subscribe to this mod's changes

proton-safe is an MCP server published in the GitHub repository fbossiere/proton-safe-mcp (3 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.