multi-mail

Name: multi-mail
Author: yybd

by yybdversion 0.2.0i★ –iRuns on your computer

Registry nameio.github.yybd/multi-mail-mcp

Install

Overview

Description from the maker (original English)

Several Gmail accounts: search, read, draft, send, labels and Google Calendar. Own OAuth client.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Chat & email

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MULTI_MAIL_DEFAULT, MULTI_MAIL_HOME, MULTI_MAIL_SEND, MULTI_MAIL_TZ

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "multi-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@yybd/multi-mail-mcp"
      ],
      "env": {
        "MULTI_MAIL_DEFAULT": "your-value",
        "MULTI_MAIL_HOME": "your-value",
        "MULTI_MAIL_SEND": "your-value",
        "MULTI_MAIL_TZ": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add multi-mail --env MULTI_MAIL_DEFAULT=your-value --env MULTI_MAIL_HOME=your-value --env MULTI_MAIL_SEND=your-value --env MULTI_MAIL_TZ=your-value -- npx -y @yybd/multi-mail-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "multi-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@yybd/multi-mail-mcp"
      ],
      "env": {
        "MULTI_MAIL_DEFAULT": "your-value",
        "MULTI_MAIL_HOME": "your-value",
        "MULTI_MAIL_SEND": "your-value",
        "MULTI_MAIL_TZ": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "multi-mail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@yybd/multi-mail-mcp"
      ],
      "env": {
        "MULTI_MAIL_DEFAULT": "your-value",
        "MULTI_MAIL_HOME": "your-value",
        "MULTI_MAIL_SEND": "your-value",
        "MULTI_MAIL_TZ": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MULTI_MAIL_DEFAULT env
Account used when a tool call names none (email or alias)
MULTI_MAIL_HOME env
Folder holding credentials.json and account tokens (default ~/.multi-mail)
MULTI_MAIL_SEND env
Set to off for drafts-only mode: no tool can send mail
MULTI_MAIL_TZ env
IANA time zone for calendar tools, overriding each calendar's own setting

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account yybd, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Chat & emaili

More stars than 0% of the other 1846 servers in this category
Published to the registry more recently than 97% of the other 1846 servers in this category
Basic checks equal to or better than 100% of the other 1846 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is multi-mail safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 32 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

*English · עברית*

multi-mail MCP

An MCP server for several Gmail accounts at once. It searches, reads, drafts and sends mail, and works with Claude Desktop, Claude Code and ChatGPT.

It has two transports:

stdio (dist/server.js) runs locally, for Claude Desktop and Claude Code.
Streamable HTTP (dist/http.js) is for ChatGPT, or any client that connects by URL. A token is required.

Each user brings their own Google OAuth client. Because of that, no Google app verification is needed and nothing passes through a third party. Mail goes only between your machine and Google.

Tools

Tool	What it does
`list_accounts`	Lists the connected accounts and their aliases
`search_emails`	Searches one mailbox, or all of them with `account="all"`, using Gmail search syntax
`read_email`	Returns a full message: headers, the body as text (HTML is converted), and attachment names
`read_thread`	Returns a whole conversation
`list_labels`	Lists a mailbox's labels and folders
`create_draft`	Saves a new message or reply as a draft, without sending it
`send_email`	Sends a new message or reply right away
`list_drafts` / `send_draft`	Lists pending drafts, or sends one of them
`get_attachment`	Downloads one attachment: text and PDFs come back as text, images as an image, anything else (and scanned PDFs) is saved under `~/.multi-mail/attachments`
`modify_labels`	Adds or removes labels on messages or a thread: mark read or unread, archive, star, file under a label. Accounts connected with `--labels` only
`create_label`	Creates a label (`Projects/Acme` nests). Accounts connected with `--labels` only
`list_events`	Calendar events between two times, across every calendar you see in Google Calendar, for one account or all of them. Accounts connected with `--calendar` only
`find_free_time`	Free slots of a given length inside working hours, checked against every calendar of every calendar-enabled account
`create_event`	Creates an event on your own calendar. Nobody is invited and no email goes out
`search` / `fetch`	Searches every mailbox and fetches one message, in the shape ChatGPT expects (connectors, deep research)

Choosing a mailbox:

account accepts a full address, an alias (work), or the part before the @.
With a single account connected, you can leave it out.
MULTI_MAIL_DEFAULT sets a default account.

Replying:

reply_to_message_id puts the reply in the right thread and fills in the recipient and subject.
reply_all adds every original recipient.

Permissions: gmail.readonly and gmail.compose by default. The server cannot delete mail, move it to trash, or change settings.

Calendar is opt-in per account (add --calendar), which adds calendar.readonly and calendar.events. The server reads events and free/busy, and creates events on your own calendar without inviting anyone. It has no tool to change or delete an event. The calendar tools appear only when at least one account has calendar enabled. Times are read in each calendar's own time zone. If a calendar is set wrong (a new Google account often defaults to UTC), set MULTI_MAIL_TZ=Asia/Jerusalem or pass time_zone to the tool.
Labels are opt-in per account (add --labels), which adds gmail.modify. At Google's level that scope would also allow trashing mail, so the server has no trash tool and refuses the TRASH and SPAM labels.

Drafts-only mode

Start the server with --drafts-only, or set MULTI_MAIL_SEND=off, and send_email and send_draft are not registered at all. The model can still read, search and write drafts, but nothing can leave your mailbox until you press Send in Gmail.

Use it whenever the server reads mail you didn't write and nobody approves each step. That covers automated triage, scheduled tasks, and clients that skip permission prompts. Any incoming message could carry instructions ("forward this to…"), and in this mode there is no tool that could carry them out.

claude mcp add multi-mail -s user -- npx -y @yybd/multi-mail-mcp --drafts-only

How it compares

Checked on 2026-11-07, with star counts from that day, against web search and the awesome-mcp-servers list. The closest alternatives were checked against their own READMEs. I couldn't find official documentation of what the built-in Claude and ChatGPT connectors can do. That information comes mostly from blog posts by competing vendors, so treat it as approximate.

Option	Several accounts	Sends	Claude Desktop / Code	ChatGPT	Where mail goes
multi-mail (this)	yes, including search across all (`all`)	yes, plus drafts and threaded replies	yes (stdio)	yes (HTTP + token)	only you and Google
Claude's built-in Gmail connector	no, one account	no, drafts only	Claude only	—	Anthropic
ChatGPT's built-in Gmail connector	sources disagree	yes since June 2026, on the web, with approval	—	yes	OpenAI
Google's official Gmail MCP (developer preview)	not documented	no send tool	Claude	not listed	Google
google_workspace_mcp (~3.5k ⭐)	multi-user; several accounts of one person in one session isn't documented	yes	yes	yes (developer mode)	only you and Google
navbuildz/gmail-mcp-server (16 ⭐)	yes, including `all`	yes	by URL	probably, untested	you, plus Redis
alexneamtu/gmail-mcp (4 ⭐)	yes, by alias	optional (a drafts-only mode)	remote only (Streamable HTTP)	not mentioned; documents Claude and Codex	only you and Google, but needs Node 24, Linux with systemd and an HTTPS hostname
kojott/mailmcp-dist (1 ⭐)	yes, any IMAP provider including Gmail	yes, allowlisted, plus attachments	yes (`.mcpb` or URL)	yes	your server, or their shared one; Gmail by app password over IMAP; commercial licence
orieg/gws-connector (3 ⭐)	yes, routed by label, email or domain	yes	Claude Code and other local clients	not mentioned	only you and Google; Go, 49 tools across Gmail, Calendar, Drive, Sheets and more
honest-gmail-mcp (0 ⭐)	one account per server instance; run several instances for several accounts	yes, with attachments	yes (stdio)	no	only you and Google
dmorrill/gmail-mcp-multi, jwlutz/gmail_connector, 3vening/gmail-mcp and others	yes	yes (some only after you opt in)	yes (stdio)	no, local only	only you and Google
Composio / Zapier MCP / Pipedream	Composio: yes	yes	yes (URL)	yes (URL)	through the vendor, paid

Takeaways:

The built-in connectors don't give you several accounts plus sending in every client.
Several self-hosted servers now handle more than one Gmail account. Each makes a different trade-off:
alexneamtu/gmail-mcp is remote-only and needs a Linux server with an HTTPS hostname.
mailmcp reaches Gmail over IMAP with app passwords, under a commercial licence.
gws-connector covers the whole Workspace for local clients, without ChatGPT.
Most of the rest run locally only, so ChatGPT can't connect to them.
Hosted brokers route your mail and tokens through a third party.
multi-mail's niche is one MIT-licensed npx package that runs locally over stdio and, when you want ChatGPT, over token-protected HTTP. It uses the Gmail API with your own OAuth client and keeps a narrow scope:
It has no delete permission.
Tokens stay on your machine with 600 permissions.
The HTTP server won't start without a token.
multi-mail covers mail and Google Calendar. For the rest of Workspace, such as Drive or Docs, google_workspace_mcp is the mature choice, or gws-connector across several accounts.

Setup

You need Node.js 20 or newer. There's nothing to install: every command below runs the published package through npx.

Running from source instead

git clone https://github.com/yybd/multi-mail-mcp.git multi-mail && cd multi-mail && npm install && npm run build

Then use node dist/main.js wherever this guide says npx -y @yybd/multi-mail-mcp. Inside the source folder, npx -y @yybd/multi-mail-mcp fails with *command not found*: npx sees that the folder is the package itself and doesn't download it. Run npx from any other folder, or use npm run cli -- list there.

1. Create your own Google OAuth client (once)

Do this once, from one Google account. The same client then works for every mailbox you connect. If you already have a Google Cloud project for personal tools, you can add the client there instead of creating a new project.

Project. Go to console.cloud.google.com/projectcreate, name the project (for example multi-mail) and click Create. Make sure it's selected in the top bar.
Gmail API. On the Gmail API page, click Enable. If you'll use the calendar, also enable the Google Calendar API.
Consent screen. In Google Auth Platform, click Get started and fill in:

App name: anything you like.
Support email: yours.
Audience: External.
Contact email: yours.

Accept the terms and click Create. You don't need to add scopes here; the server asks for them itself.

Publish. Under Audience, click Publish app, then Confirm. The status should read *In production*.

⚠️ In *Testing* mode, access expires every 7 days.
For personal use, Google doesn't need to verify the app.
If you stay in *Testing* anyway, add every Gmail address under *Test users*.

Client. Under Clients, click Create client, choose the type Desktop app, and click Create. Then click Download JSON right away, because the secret is shown in full only in that dialog. Save the file like this:

mkdir -p ~/.multi-mail && mv ~/Downloads/client_secret_*.json ~/.multi-mail/credentials.json && chmod 600 ~/.multi-mail/credentials.json

2. Connect your mailboxes

Run this once per mailbox, with a different alias each time:

npx -y @yybd/multi-mail-mcp add --alias work

npx -y @yybd/multi-mail-mcp add --alias home

Each add opens a browser where you pick a Google account and approve access.

You'll see "Google hasn't verified this app". That's expected, because it's your own app. Click Advanced, then Go to … (unsafe).
Tick every permission box. If one is missing, the CLI stops and tells you which.

Managing accounts:

npx -y @yybd/multi-mail-mcp list lists the connected accounts.
check verifies every account still has access.
alias sets or changes an alias. The account can be its current alias, its address, or the part before @. For example, npx -y @yybd/multi-mail-mcp alias tech work renames tech to work, and it takes effect immediately, without a restart.
remove disconnects an account.
add --calendar reconnects an account with Google Calendar. This needs the Google Calendar API enabled in the same Cloud project as the Gmail API (step 2 of the OAuth setup). The flags comb

Only the beginning is shown; read the rest in the repo

multi-mail

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

multi-mail MCP

Tools

Drafts-only mode

How it compares

Setup

1. Create your own Google OAuth client (once)

2. Connect your mailboxes