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Protonlite MCP server

by Maytrella007·io.github.Maytrella007/protonlite·v0.1.3
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Python Proton Mail, Calendar, Contacts and Drive client with an MCP server. Free plan, no Bridge.

A92/100grade A
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Safety scan
A92/100

full report

Adoption
Growing

0 stars382 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Protonlite tools (18, 7 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • calendar

    Show the Proton Calendar agenda for the next N days.

  • contacts

    List Proton contacts (name and email), optionally filtered by a query.

  • drive_download

    Download and decrypt a Proton Drive file to a local directory.

  • drive_list

    List a Proton Drive folder by path (folders first); empty path is the root.

  • drive_mkdirwrite action

    Create a new Proton Drive folder (empty parent_folder is the root).

  • drive_move

    Move a Proton Drive file or folder into another folder (empty dest_folder is the root).

  • drive_rename

    Rename a Proton Drive file or folder in place.

  • drive_share_linkwrite action

    Create a public share link for a Proton Drive file or folder. The returned URL is the whole secret (its fragment holds the password) and lets anyone open the file, so only share it when the person asked to make this file public.

  • drive_trash

    Move a Proton Drive file or folder to the trash (recoverable in Proton Drive).

  • drive_unshare_link

    Revoke a Proton Drive file or folder's public share link.

  • drive_uploadwrite action

    Encrypt and upload a local file into a Proton Drive folder (empty dest_folder is the root).

  • email_allowwrite action

    Set the recipient allowlist for send_message. Pass specific addresses or globs (e.g. *@company.com) to restrict sending to them, ["*"] to allow anyone, or [] to block all sending. A hard ceiling from PROTON_ALLOWED_RECIPIENTS still applies on top and cannot be loosened here.

  • email_policy_statuswrite action

    Show the send policy: which recipients the allowlist permits (or that it is open), any hard ceiling set by the PROTON_ALLOWED_RECIPIENTS env var, and whether a send needs confirmation.

  • list_messages

    List messages in a Proton Mail folder (inbox, sent, archive, spam, trash, starred...).

  • read_message

    Read one Proton Mail message by id, decrypted, with HTML flattened to prose.

  • search_messages

    Find messages whose sender or subject contains the query.

  • send_messagewrite action

    Send an email. Plain text by default; set html=true to send the body as HTML. attachments is a list of local file paths to attach, e.g. a file you just fetched with drive_download. A send is refused if a recipient is not on the allowlist (see email_policy_status / email_allow). When the confirm-before-sending rule is on, the first call sends nothing and returns a confirmation request; call again w

  • set_send_confirmationwrite action

    Turn the 'confirm before sending' rule on or off. When on, send_message sends nothing until it is called again with confirm=true, so a person can approve first. If PROTON_REQUIRE_SEND_CONFIRMATION is set, the rule is forced on and cannot be turned off here.

Public scan report

scanner v0.1.10 · 2026-10-25 · same rubric, same numbers if you re-run it

no findings
  • Code scan21 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 2 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Protonlite compares

Against every graded Productivity MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
92/100
higher than 90% of 1,299 Productivity servers
Tools
18
the typical Productivity server has 7
Tools that change things
39%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
382
more than 80% of 427 Productivity servers with a package

What its tools let an agent do: 11 read · 4 change · 3 send or post

Install Protonlite in Claude Code, Cursor or VS Code

claude mcp add protonlite -- uvx protonlite
Add to Cursor

What the publisher says

From the Protonlite repository's README, as published. We do not edit it. Read it on GitHub

<!-- mcp-name: io.github.Maytrella007/protonlite -->

protonlite

A small, dependency-light Python client and API for Proton Mail (ProtonMail) -- Mail, Calendar, Contacts and Drive, with no Proton Mail Bridge and no paid plan. Ships an optional MCP server so an agent (Claude Code, Cursor) can use your mailbox.

Proton has no IMAP or SMTP. The official way in is Proton Mail Bridge, which needs a paid plan. protonlite talks to Proton's web API directly, so it works on a free account, and the end-to-end crypto is ported from Proton's own MIT-licensed Go libraries (go-srp, go-proton-api). It stays MIT-licensed and dependency-light: just OpenPGP (PGPy13, a maintained fork of PGPy), bcrypt and requests. No CAPTCHA solver, no computer-vision stack -- a person completes Proton's verification page the same way Proton's own apps do.

Unofficial. This project is not affiliated with, endorsed by, or supported by Proton AG.

"Proton", "Proton Mail", "Proton Calendar" and "Proton Drive" are trademarks of Proton AG.

It talks to a private, undocumented API that can change at any time, and using it may be

subject to Proton's terms of service. Use it at your own risk, on accounts you own.

What it does

search, send (plain or HTML, attachments, replies in-thread, scheduled), save drafts, mark read/unread, trash/delete, labels and folders, empty trash, storage usage.

  • Mail -- read the inbox and any folder, decrypt messages (HTML flattened to text),

share links.

  • Calendar -- read the agenda, create / edit / cancel events, send invitations, RSVP.
  • Contacts -- read, create, edit and delete contacts (signed/encrypted vCards).
  • Drive -- list, download, upload (encrypted), move, rename, trash, and create public

All of it is end-to-end: keys are unlocked locally with the account password and messages, events, contacts and files are decrypted on your machine.

Install

pip install protonlite

Requires Python 3.10+.

Quickstart

import os
import datetime as dt

from protonlite import ProtonMail

# --- Signing in -------------------------------------------------------------
# The recommended way is the CLI `protonlite login`, which reads the password
# with getpass so it never lives in a script. For automation, read it from the
# environment rather than hard-coding it. Proton usually asks a human to
# complete a verification page; login raises HumanVerificationRequired with
# that URL -- open it, then call again passing verification_token (see
# "Signing in" below). Sign in each account once; every login saves its own
# session file.
ProtonMail.login(
    "you@proton.me",
    password=os.environ["PROTON_PASSWORD"].encode(),
    session_path="you@proton.me.json",
)

# --- More than one account --------------------------------------------------
# Reopen each saved session independently -- no password needed. The two
# clients are fully independent mailboxes.
client  = ProtonMail.from_session(session_path="you@proton.me.json")    # personal
client1 = ProtonMail.from_session(session_path="work@proton.me.json")   # work
# (after a CLI `protonlite login`, ProtonMail.for_account("work") finds it by name)
print(cli

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Protonlite: common questions

Is Protonlite MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the Protonlite safety report
How do I install Protonlite?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Protonlite need an API key?
No secret keys are declared. It reads 1 setting from the environment.
Is Protonlite maintained?
The last commit was 12 days ago (2026-10-22). The latest release is v0.1.3.
What can I use instead of Protonlite?
Servers from other publishers that do the same job: AIquila — Nextcloud MCP Server, iCloud MCP server and Mu MCP server. Compare all Protonlite alternatives.
How does Protonlite compare with other Productivity MCP servers?
safety score 92/100 (higher than 90% of 1,299 Productivity servers); tools 18 (the typical Productivity server has 7); tools that change things 39% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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