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Proton Workflow Connector

제작자: NtrpyDev버전 1.3.0i★ –i내 컴퓨터에서 실행
레지스트리 이름io.github.NtrpyDev/proton-workflow-connector

설치

개요

제작자가 쓴 설명(영어 원문)

Unofficial self-hosted MCP connector for Proton Mail Bridge and SimpleLogin.

PopNx MCP의 세 기둥

이 세 가지는 절대 하나의 점수로 합치지 않아요. 의견, 측정, 인기는 서로 다른 것이니까요.

할 수 있는 일

이 서버는 아직 쉬운 말로 된 요약을 쓰지 못했어요. 아래는 레지스트리에서 읽어 온 사실이에요.

  • 연결 방식: 내 컴퓨터에서 실행
  • 전송 방식: stdio
  • 카테고리: 기타
  • 입력해야 할 값: PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, PROTON_BRIDGE_EMAIL, SIMPLELOGIN_API_KEY

설치

쓰고 있는 AI 앱을 고른 다음 설정을 복사하세요.

설치하기 전에

  • 기본 점검: 1개 중 1개 통과
  • 내 컴퓨터에서 내 사용자 계정의 권한(파일, 네트워크, 앱)으로 실행돼요.
  • 직접 입력할 값: PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, PROTON_BRIDGE_EMAIL, SIMPLELOGIN_API_KEY

비밀로 표시된 값은 내 계정의 열쇠예요. 절대 다른 사람과 공유하거나 채팅에 붙여 넣지 마세요.

필요한 것

  • PyPIPython의 uv 설치(uvx 명령어용)

어떤 앱을 쓰세요?

위에서 앱을 고르세요. 기억해 두었다가 다음부터는 버튼에 “…에 설치”라고 표시해요.

Claude Desktop → Settings → Developer → Edit Config를 열고 claude_desktop_config.json에 이 내용을 붙여 넣으세요

{
  "mcpServers": {
    "proton-workflow-connector": {
      "command": "uvx",
      "args": [
        "proton-workflow-connector"
      ],
      "env": {
        "PROTON_BRIDGE_USERNAME": "your-value",
        "PROTON_BRIDGE_PASSWORD": "your-value",
        "PROTON_BRIDGE_EMAIL": "your-value",
        "SIMPLELOGIN_API_KEY": "your-value"
      }
    }
  }
}

터미널에서 이 명령어를 실행하세요

claude mcp add proton-workflow-connector --env PROTON_BRIDGE_USERNAME=your-value --env PROTON_BRIDGE_PASSWORD=your-value --env PROTON_BRIDGE_EMAIL=your-value --env SIMPLELOGIN_API_KEY=your-value -- uvx proton-workflow-connector

실행하기 전에 빈 값을 채워 주세요.

Cursor에서 열기

또는 설정을 직접 복사하기

프로젝트의 .cursor/mcp.json 또는 ~/.cursor/mcp.json에 붙여 넣으세요

{
  "mcpServers": {
    "proton-workflow-connector": {
      "command": "uvx",
      "args": [
        "proton-workflow-connector"
      ],
      "env": {
        "PROTON_BRIDGE_USERNAME": "your-value",
        "PROTON_BRIDGE_PASSWORD": "your-value",
        "PROTON_BRIDGE_EMAIL": "your-value",
        "SIMPLELOGIN_API_KEY": "your-value"
      }
    }
  }
}

브라우저가 앱을 열지 물어본 다음, 앱이 설정을 보여 주고 확인을 요청해요. 키 값은 비워 두니 직접 입력하세요.

VS Code에서 열기

또는 설정을 직접 복사하기

프로젝트의 .vscode/mcp.json에 붙여 넣으세요

{
  "servers": {
    "proton-workflow-connector": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "proton-workflow-connector"
      ],
      "env": {
        "PROTON_BRIDGE_USERNAME": "your-value",
        "PROTON_BRIDGE_PASSWORD": "your-value",
        "PROTON_BRIDGE_EMAIL": "your-value",
        "SIMPLELOGIN_API_KEY": "your-value"
      }
    }
  }
}

브라우저가 앱을 열지 물어본 다음, 앱이 설정을 보여 주고 확인을 요청해요. 키 값은 비워 두니 직접 입력하세요.

이 서버는 내 컴퓨터에서 실행되는데, ChatGPT는 인터넷에 있는 서버에만 연결할 수 있어요. 다른 앱을 고르세요.

선택한 앱은 이 기기의 쿠키에만 저장돼요. 계정은 필요 없어요.

직접 입력할 값

  • PROTON_BRIDGE_USERNAME 필수 env
    Bridge IMAP/SMTP username (from the Bridge app)
  • PROTON_BRIDGE_PASSWORD 비밀 필수 env
    Bridge-generated password (never your Proton account password)
  • PROTON_BRIDGE_EMAIL 필수 env
    Primary Proton address served by Bridge
  • SIMPLELOGIN_API_KEY 비밀 env
    SimpleLogin API key; omit to disable alias tools

이 설정은 제작자의 레지스트리 정보로 만들었어요. README와 다르면 README를 따르세요.

할 수 있는 일

내 컴퓨터에서 실행돼요. 설치하면 AI 앱에 도구 목록이 나타나요.

기본 점검i

누구나 볼 수 있는 정보를 점검했고, 코드는 읽지 않았어요. 해당하지 않는 항목은 개수에서 뺐어요. · 2026년 11월 7일 점검

  • ✓ 통과

    제작자와 저장소 일치

    레지스트리 이름이 GitHub 계정 NtrpyDev 기준으로 확인되었고, 이 계정이 저장소를 소유하고 있어요

  • … 아직 점검 안 함

    계속 관리되고 있음

    아직 GitHub에서 이 저장소를 읽어 오지 않았어요

  • … 아직 점검 안 함

    라이선스 있음

    아직 GitHub에서 이 저장소를 읽어 오지 않았어요

  • – 해당 없음

    엔드포인트 응답

    내 컴퓨터에서 실행되는 서버라 인터넷 엔드포인트가 없어요

  • – 해당 없음

    OAuth로 로그인

    내 컴퓨터에서 실행되며, 대신 로컬 설정을 사용해요

  • … 아직 점검 안 함

    도구 설명에 숨겨진 지시 없음

    내 컴퓨터에서 실행돼요. 도구 목록은 인터넷 엔드포인트가 있는 서버에서만 읽을 수 있어요

기타 카테고리의 다른 서버와 비교i

  • 이 카테고리의 다른 서버 18345개 중 0%보다 스타가 많아요
  • 이 카테고리의 다른 서버 18345개 중 13%보다 최근에 레지스트리에 공개됐어요
  • 기본 점검 결과가 이 카테고리의 다른 서버 18345개 중 100%와 같거나 더 좋아요

레지스트리에서 이 카테고리의 활성 서버 전체와 비교했어요. 스타는 게시자가 저장소를 소유한 경우에만 세요.

자주 묻는 질문

Proton Workflow Connector, 안전한가요?

해당하는 기본 점검 1개 중 1개를 통과했어요. 코드는 읽지 않았어요. 키나 토큰을 넣기 전에 서버가 어떤 권한을 요구하는지 확인하고, 꼭 필요한 권한만 있는 키를 쓰세요.

어떤 키나 코드가 필요한가요?

입력해야 할 값: PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, PROTON_BRIDGE_EMAIL, SIMPLELOGIN_API_KEY

내 컴퓨터에서 실행되나요, 클라우드에서 실행되나요?

내 컴퓨터에서 실행돼요. AI 앱이 필요할 때 실행하고, 데이터는 제작자의 서버를 거치지 않아요(서버 자체가 온라인 서비스를 호출하는 경우는 제외).

아직 관리되고 있나요?

GitHub 저장소는 마지막으로 – 변경됐고, 최신 버전(1.3.0)은 4개월 전 레지스트리에 올라왔어요.

어떤 앱에서 쓸 수 있나요?

Claude Desktop, Claude Code, Cursor, VS Code처럼 MCP를 지원하는 앱에서 쓸 수 있어요. 내 컴퓨터에 Python (uv)도 있어야 해요.

대신 쓸 수 있는 건 뭐가 있나요?

같은 카테고리에는: Spec Driven Development, Remote Desktop Commander, ScienceShot science reference

대안

같은 카테고리에서 다른 제작자가 만든 서버예요. 스타 순으로 정렬했어요.

카드 보는 법:★ GitHub 스타i세 기둥: 리뷰 · 점검 · 사용 정도i업데이트 = 최신 버전을 레지스트리에 공개한 날i

Spec Driven Development

제작자: formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

내 컴퓨터에서 실행★ 440MIT14개월 전 업데이트
설치

Remote Desktop Commander

제작자: desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

클라우드에서 실행★ 211그저께 업데이트
설치

ScienceShot science reference

제작자: scienceshot.com

Sourced, citable answers in radiation and particle physics, photonics, electronics and quantum.

클라우드에서 실행오늘 업데이트
설치

제작자의 README

README 열기

제작자의 저장소에서 쓰인 그대로 가져왔어요. PopNx MCP가 검토하거나 보증한 내용이 아니에요. HTML, 이미지, 스크립트는 제거했어요. 링크를 누르면 이 사이트를 벗어나요.

Proton Workflow Connector

Proton Workflow Connector (PWC) is a self-hosted MCP connector for reading, sending, organizing, and automating Proton Mail through Proton Mail Bridge. It works with any MCP client or local agent runtime that can launch a stdio server or call a Streamable HTTP MCP endpoint. SimpleLogin support is optional.

This is an unofficial project. It is not affiliated with, endorsed by, or sponsored by Proton AG. The connector uses Bridge-generated IMAP/SMTP credentials. It does not accept Proton account passwords or store Proton login sessions.

Quick start · Example workflows · Capabilities · Automations · Security · Documentation · Buy Me a Coffee

Why use it?

Use one local server for the mail work agents usually have to piece together:

  • Search, read, send, reply, forward, draft, label, archive, and download attachments through 53 Proton Mail tools.
  • Require confirmation for destructive tools, preview sends and destructive operations with dry_run, sanitize outbound HTML by default, bound bulk operations, and allow only configured sender addresses.
  • React to new mail or SimpleLogin aliases through MCP polling or a background watcher that can call a webhook, append JSONL, or run a command.
  • Add 13 SimpleLogin tools when you want alias, contact, and mailbox management.
  • Connect over stdio, localhost Streamable HTTP, or OAuth-protected hosted HTTP.

The server exposes 68 tools in total. See the complete tool reference.

How it works

PWC is an MCP server. Your client starts it over stdio or connects to it over Streamable HTTP.

The connector talks to Proton Mail Bridge over local IMAP/SMTP. Bridge must be installed, signed in, and running on the same machine as the connector. One connector process serves one Bridge account.

SimpleLogin is optional. If SIMPLELOGIN_API_KEY is set, PWC adds alias, contact, mailbox, and new-alias polling tools. If it is unset, the Proton Mail tools still work.

For automation, run proton-workflow-watch or call the polling tools from your MCP client. Watcher output can go to a webhook, a JSONL file, or a command.

Quick start

Prerequisites
  • Python 3.11 or newer
  • Proton Mail Bridge, signed in and running
  • The IMAP/SMTP host, ports, username, and generated password shown by Bridge
  • A SimpleLogin API key only if you want the optional SimpleLogin tools
1. Install
git clone https://github.com/NtrpyDev/proton-workflow-connector.git

cd proton-workflow-connector python -m venv .venv source .venv/bin/activate python -m pip install .

On Windows PowerShell, activate the environment with .venv\Scripts\Activate.ps1.

2. Configure Bridge credentials

Keep the environment file outside the repository:

mkdir -p ~/.config/proton-workflow-connector

cp .env.example ~/.config/proton-workflow-connector/env chmod 600 ~/.config/proton-workflow-connector/env

Edit the copied file with the connection details shown in Proton Mail Bridge. Set PROTON_BRIDGE_EMAIL to the default sender and list every permitted sender address in PROTON_BRIDGE_SENDER_ADDRESSES.

3. Run the connector
proton-workflow-connector --transport stdio \

--env-file ~/.config/proton-workflow-connector/env

4. Connect an MCP client

Any MCP client or local agent runtime can use PWC as long as it supports stdio or Streamable HTTP:

  • stdio: run proton-workflow-connector --transport stdio --env-file ...
  • HTTP: run the connector with --transport streamable-http and point the client at /mcp

Claude Code stdio example:

claude mcp add --transport stdio --scope user proton-workflow \

-- "$PWD/.venv/bin/proton-workflow-connector" --transport stdio \ --env-file ~/.config/proton-workflow-connector/env

Codex stdio example:

[mcp_servers.proton_workflow]

command = "/absolute/path/to/repo/.venv/bin/proton-workflow-connector" args = [ "--transport", "stdio", "--env-file", "/absolute/path/to/private/proton-workflow-connector-env" ] default_tools_approval_mode = "prompt" startup_timeout_sec = 20 tool_timeout_sec = 120

Run server_status after connecting. It checks IMAP, SMTP, SimpleLogin, OAuth configuration, and the server version without returning secrets. Then run list_folders; Bridge folder names vary by account and version.

See MCP client setup for generic client configuration, localhost HTTP, hosted Streamable HTTP, Codex, Claude Code, and the plugin wrapper.

Example workflows

Once connected, ask your MCP client to:

  • "List my mail folders and show the unread count for each."
  • "Find unread invoices from the last 30 days without marking them read."
  • "Draft a reply to the latest message in this thread, but do not send it."
  • "Download the PDF attachments from this message."
  • "Archive these message UIDs after showing me the exact list."
  • "Create a SimpleLogin alias for shopping and add a contact for this merchant."
  • "Poll for new mail from billing@vendor.example using the invoices cursor."

The connector returns structured data to the MCP client. The client decides how to present it and when to request approval for actions.

Capabilities

AreaIncluded operations
Search and readingSearch one folder or all selectable folders, read messages and threads, inspect headers, and download attachments
Sending and draftsSend, reply, reply-all, forward, create and update drafts, use allowed alternate senders, and attach files
OrganizationCreate and manage folders, apply Proton labels, change flags, archive, move, copy, restore, and manage Spam or Trash
Bounded bulk actionsPreview, mark, star, move, copy, archive, trash, restore, or permanently delete explicit UID lists
AutomationsPoll persistent cursors or push new-message and new-alias events to a webhook, JSONL file, or command
SimpleLoginInspect account data and manage aliases, contacts, and mailboxes with an optional API key
DeploymentLocal stdio, localhost Streamable HTTP, or OAuth/OIDC-protected hosted HTTP

Proton Contacts are not included because Proton Mail Bridge does not expose them.

Automations

The background watcher polls for new mail or newly created SimpleLogin aliases and emits one event per new item:

proton-workflow-watch \

--env-file ~/.config/proton-workflow-connector/env \ --folder INBOX \ --webhook-url https://example.com/hooks/proton \ --interval 60

Key behavior:

  • The first run establishes a baseline and does not replay the existing mailbox.
  • Persistent cursors survive restarts and account for IMAP UIDVALIDITY changes.
  • Webhook delivery is at-least-once, with retries, exponential backoff, and dead-letter handling.
  • An optional HMAC-SHA256 signature lets webhook receivers verify each event.
  • Events contain message metadata only; bodies and attachments remain available on demand through MCP tools.
  • JSON rules can run several independently filtered triggers from one watcher.
  • --dry-run shows which events and rule actions would fire without delivering, acting, or advancing cursors.

Read Triggers and webhooks for event schemas, filters, delivery guarantees, signature verification, rules, and systemd examples.

Security model

This connector processes private mail. Its defaults and boundaries are intentionally explicit:

  • Prefer local stdio. Bridge and the connector should stay on the same trusted machine whenever possible.
  • Keep credentials private. Store Bridge-generated credentials and optional API keys outside Git with user-only permissions.
  • Confirm destructive actions. Permanent deletion, empty-folder operations, folder deletion, and alias deletion require confirm=true after explicit user intent.
  • Preview before mutating. Sends, forwards, replies, bulk actions, permanent delete, and empty-folder operations support dry_run=true previews.
  • Treat mail as untrusted. Read/search results mark email content as content_trust: "untrusted", and outbound HTML is sanitized unless trusted_html=true.
  • Bound bulk operations. Bulk tools require explicit numeric UIDs and default to a maximum of 50 messages per call.
  • Restrict senders. Mail can only be sent from PROTON_BRIDGE_EMAIL or an address in PROTON_BRIDGE_SENDER_ADDRESSES.
  • Protect remote access. Non-local HTTP deployments require deliberate Host/Origin policy; internet deployments require HTTPS and an external OAuth/OIDC provider.
  • Limit exposed data. Optional audit records exclude addresses, message bodies, attachments, credentials, and tokens.
  • Treat events as untrusted input. Email subjects and alias names can be attacker-controlled; webhook receivers and commands must validate event fields.

Read SECURITY.md before using real mail and Hosted HTTP setup before exposing the connector beyond localhost.

Known boundaries

  • Proton Mail Bridge must remain running while the connector or watcher is active.
  • One server process connects to one Bridge account.
  • Proton Contacts, native scheduled sending, filters, account settings, and key management are not exposed by Bridge and are not emulated.
  • New-mail and new-alias triggers use polling because Proton and SimpleLogin do not provide a compatible push API.
  • Trigger events include metadata, not message bodies or attachments.
  • All Mail is a virtual read-only Bridge mailbox; start move and permanent-delete operations from a writable folder.

Documentation

GuideUse it for
SetupBridge configuration, private environment files, folder names, and network modes
Tool referenceAll 68 MCP tools, arguments, safety limits, and boundaries
Client setupGeneric MCP clients, local agents, Codex, Claude Code, plugins, and Streamable HTTP
Triggers and webhooksWatcher rules, payloads, delivery behavior, and signature verification
Hosted HTTPOAuth/OIDC, HTTPS, Host/Origin validation, scopes, audit logs, and systemd
Integration testsLive Bridge and SimpleLogin verification

Official upstream references:

Development

Install the development dependencies and run the local checks:

python -m pip install -e ".[dev]"

ruff check . ruff format --check . pytest python -m compileall -q src pip-audit gitleaks detect --redact --config .gitleaks.toml

Tests use synthetic data and do not require access to a real mailbox. Live checks are documented separately in Integration tests.

See CONTRIBUTING.md for contribution and privacy requirements. Report security issues privately as described in SECURITY.md.

License

MIT. See LICENSE.

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