Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Descripción del creador (original en inglés)
Read-only MCP server for your mail — provider-agnostic IMAP that never marks a message as read.
Estos tres nunca se combinan en una sola puntuación: las opiniones, las mediciones y la popularidad son cosas distintas.
Todavía no escribimos un resumen sencillo para este. Abajo están los datos que leímos del registro.
Elige la app de IA que usas y copia la configuración.
Necesitas
¿Qué app usas?
Elige tu app arriba. La recordamos, así que la próxima vez el botón dirá “Instalar en …”.
Abre Claude Desktop → Settings → Developer → Edit Config y pega esto en claude_desktop_config.json
{
"mcpServers": {
"rubit-mail": {
"command": "uvx",
"args": [
"rubit-mcp-mail",
"serve"
]
}
}
}Ejecuta esto en tu terminal
claude mcp add rubit-mail -- uvx rubit-mcp-mail servePégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json
{
"mcpServers": {
"rubit-mail": {
"command": "uvx",
"args": [
"rubit-mcp-mail",
"serve"
]
}
}
}Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.
Pégalo en .vscode/mcp.json de tu proyecto
{
"servers": {
"rubit-mail": {
"type": "stdio",
"command": "uvx",
"args": [
"rubit-mcp-mail",
"serve"
]
}
}
}Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.
Este se ejecuta en tu computadora, y ChatGPT solo puede conectarse a servidores en internet. Elige otra app.
Tu elección se guarda en una cookie en este dispositivo; no necesitas cuenta.
Esta configuración se genera a partir de la ficha del creador en el registro. Si el README dice otra cosa, sigue el README.
Se ejecuta en tu computadora; la lista de herramientas aparece en tu app de IA después de instalarlo.
Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 7 nov 2026
El nombre en el registro se verificó con la cuenta de GitHub bgalmes, dueña del repo
Todavía no hemos leído este repo en GitHub
Todavía no hemos leído este repo en GitHub
Este se ejecuta en tu computadora; no hay endpoint en internet
Se ejecuta en tu computadora y usa ajustes locales en su lugar
Se ejecuta en tu computadora; solo podemos leer listas de herramientas de endpoints en internet
Comparado con todos los servidores activos de esta categoría en el registro. Las estrellas solo cuentan cuando quien lo publica es dueño del repo.
Superó 1 de 1 revisiones básicas aplicables. No hemos leído el código. Antes de agregar una clave o un token, revisa qué acceso pide el servidor y usa una clave que tenga solo los permisos que necesitas.
El registro no indica ninguna clave obligatoria, aunque algunos servidores te piden iniciar sesión la primera vez que los usas.
Se ejecuta en tu computadora. Tu app de IA lo inicia cuando hace falta, y los datos no pasan por los servidores del creador (a menos que el propio servidor llame a un servicio en línea).
El repo de GitHub cambió por última vez –, y la última versión (1.0.0) llegó al registro hace 2 meses.
Las apps compatibles con MCP, como Claude Desktop, Claude Code, Cursor y VS Code. También necesitas Python (uv) en tu computadora.
En la misma categoría: Spec Driven Development, Remote Desktop Commander, Signoff
Servidores de la misma categoría hechos por otros creadores, ordenados por estrellas.
Cómo leer una tarjeta:★ Estrellas de GitHubiTres pilares: reseñas · revisiones · usoiActualizado = fecha en que se publicó la última versión en el registroi
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Five gates that make an agent's 'done' provable: run them, read the verdict, audit the record.
Copiado tal cual del repo del creador. PopNx MCP no lo ha revisado ni lo respalda. Se quitaron HTML, imágenes y scripts. Los enlaces llevan fuera de este sitio.
A read-only MCP server for reading your mail. Provider-agnostic: it speaks IMAP, so it works with Outlook.com, Gmail, Fastmail, iCloud, or a self-hosted server — the provider is a line of config, not a code change.
Read-only by construction. Folders are opened with EXAMINE, never SELECT, and bodies are fetched with BODY.PEEK, so reading a message does not even mark it as read. There are no send, move, delete, or flag code paths, and a test asserts none are ever added.
📖 Full documentation: [https://bgalmes.github.io/rubit-mcp-mail/](https://bgalmes.github.io/rubit-mcp-mail/)
Download the installer for your system from the latest release and run it:
| System | File |
|---|---|
| Windows | rubit-mcp-mail-setup-windows.exe |
| Linux | rubit-mcp-mail-setup-linux — chmod +x it first |
Nothing needs to be installed beforehand: Python and every dependency are inside that one file. A window asks for your provider and email address, signs you in, and registers the mail server with Claude Desktop and Claude Code if it finds them — restart Claude Desktop afterwards and your mail is there. It also leaves you a rubit-mcp-mail Settings shortcut for everything you want to change later. No terminal, at any point.
There is no macOS installer; on a Mac, install from source (below).
A note on antivirus warnings. Windows Defender or Avast may flag this .exe. This is a known false positive common to unsigned PyInstaller-built applications, not anything this project's code does — see the install guide for what to do about it. Every published SHA-256 is listed on the changelog.
| Tool | What it does |
|---|---|
list_accounts | Configured accounts and whether each is authenticated |
list_folders | Folders with normalized roles and unread counts |
list_messages | Browse a folder, newest first, paginated |
search_messages | Server-side search by text, sender, subject, date range, unread |
read_message | Full headers, body text, attachment metadata |
get_attachment | Save one attachment into the download directory |
Folders are addressed by role — inbox, sent, drafts, junk, trash, archive — so you never need to know that Outlook calls it Junk Email while Gmail calls it [Gmail]/Spam. Raw folder names work too.
Full arguments and return shapes: Tools reference.
If you already have Python 3.11+ and would rather not run an installer:
pip install rubit-mcp-mail
rubit-mcp-mail install # the same setup wizard, from the terminal
cd /path/to/rubit-mcp-mail
conda create -p ./.venv python=3.12 pip -y # this machine has no python3-venv ./.venv/bin/python -m pip install -e .
Then configure an account, rubit-mcp-mail auth , and rubit-mcp-mail doctor. The Windows variant and the full walkthrough are in Install from source.
Microsoft has retired basic auth for Outlook.com, so Outlook needs a free Azure app registration — seven steps, done once, written out in Setting up Outlook. Everything else takes an app password:
[accounts.personal]
provider = "generic" email = "you@fastmail.com" host = "imap.fastmail.com"
Known hosts: Gmail imap.gmail.com, Fastmail imap.fastmail.com, iCloud imap.mail.me.com, Yahoo imap.mail.yahoo.com. Gmail and iCloud require an app-specific password, not your login password.
If your Microsoft account genuinely can't register one, you can use the public client ID that other open-source mail tools already share for this purpose — Thunderbird's, 9e5f94bc-e8a4-4e73-b8be-63364c29d753. Paste it in as client_id. The consent screen will say "Thunderbird", and because the ID is outside our control Microsoft could rotate it. Details and caveats: Can't register your own app?.
Any account-scoped tool can be forbidden for a given account with disabled_tools in config.toml, or by unticking a box on the settings window's Permissions tab. A blocked call returns a plain Error: ... string to the model rather than failing silently. See Permissions.
claude mcp add rubit-mail --scope user -- "$(pwd)/.venv/bin/rubit-mcp-mail" serve
Claude Desktop needs a JSON entry instead, and on Linux it needs the session environment passed explicitly or the keyring is unreachable — Register with Claude has both, and Troubleshooting has the logs.
skills/rubit-mail/SKILL.md tells an agent when to reach for the mail tools and how to chain them, and reminds it that the server is read-only and that mail content is untrusted. For Claude Code, copy it into your user (or a project's .claude/) skills directory:
mkdir -p ~/.claude/skills && cp -r skills/rubit-mail ~/.claude/skills/
Any other agent that reads SKILL.md files works the same way. See Agent skill.
ruff check .
ruff format --check . pyright pytest -q
Those are the same checks CI runs. Commit messages follow Conventional Commits and drive automatic versioning — see CONTRIBUTING.md and AGENTS.md. Building the installers and adding a provider are covered in Contributing.
website/ holds the documentation site (Nuxt), deployed to GitHub Pages by .github/workflows/deploy-website.yml. It is the source of truth for the docs; this README is deliberately the short version.
[!IMPORTANT]
Website commits must not use
feat:orfix:.python-semantic-release
parses the commit *type*, not the scope, so
feat(site): …would bump the
Python package and cut an installer release. Use
docs(site):,
chore(site):orci(site):.
src/rubit_mcp_mail/
server.py MCP tool definitions main.py CLI: serve | install | auth | doctor | gui installer.py setup wizard: writes config, signs in, registers with Claude installer_gui.py the setup window (tkinter), falling back to the terminal shortcuts.py Start Menu / Desktop / .desktop entries for the GUI claude_registration.py claude_desktop_config.json / claude mcp add session.py wires config + auth + backend; attachment path safety config.py TOML config -> Account models diagnostics.py the doctor checks, as data (shared by the CLI and the GUI) permissions.py registry of per-account-toggleable tool names config_editor.py every write to config.toml: comment-preserving, validated config_gui.py the settings window (tkinter): accounts, permissions, doctor providers.py provider profile registry secrets.py keyring with 0600-file fallback models.py pydantic models + message handles mime.py BODYSTRUCTURE walking, decoding, HTML->text backends/ base.py MailBackend protocol imap.py the IMAP implementation auth/ password.py app passwords oauth_microsoft.py MSAL device-code flow skills/rubit-mail/SKILL.md agent skill: when and how to use the tools website/ the documentation site (Nuxt); see "The website" above
Every merge to main prepares a release PR carrying only the pyproject.toml and CHANGELOG.md diff; a maintainer merges it by hand, which publishes the prerelease and builds the installers; promote-release.yml is dispatched manually to drop the -rc.N suffix. The human merge is load-bearing — GitHub raises no events for anything GITHUB_TOKEN does. Full flow: CONTRIBUTING.md and How releases work.
IMAP search is substring-based, bodies are truncated at 20,000 characters, only text parts are downloaded, and Microsoft is actively tightening third-party mail access. The details are in Notes and limits.