Vexa
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Runs in the cloud✓ vexa.ai
Mbox MCP
Overview
Description from the maker (original English)
Search local email archives (.mbox/.eml) entirely on your machine. No OAuth, no cloud.
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
- UsageiVery new↓ 130/wk · ★ –
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).
- The registry lists no key to fill in.
You need
- npmNode.js installed (for the npx command)
Which app do you use?
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": {
"mbox": {
"command": "npx",
"args": [
"-y",
"mbox-mcp"
]
}
}
}Run this in your terminal
claude mcp add mbox -- npx -y mbox-mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"mbox": {
"command": "npx",
"args": [
"-y",
"mbox-mcp"
]
}
}
}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.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"mbox": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mbox-mcp"
]
}
}
}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.
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 arose26, 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 1848 servers in this category
- Published to the registry more recently than 24% of the other 1848 servers in this category
- Basic checks equal to or better than 100% of the other 1848 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 Mbox MCP 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 (0.1.1) reached the registry 3 months ago.
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:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
emailmd
Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.
Computer or cloud✓ emailmd.dev
MCP WhatsApp Cloud
MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API
Runs on your computer
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.
mbox-mcp
An MCP server for local email archives. Point it at a Google Takeout .mbox export or a folder of .eml files and ask Claude things like:
- *"Who did I email most in this archive?"*
- *"Find the message where the landlord mentioned the lease renewal."*
- *"Summarize my correspondence with bob@example.com from early 2026."*
Everything stays on your machine. No OAuth, no app passwords, no IMAP connection, no cloud. Every other email MCP server connects to a live account — this one reads the archive files you already have, which is exactly what you want for the 15 years of Gmail sitting in a Takeout export.
Quick start
Claude Code
claude mcp add mbox -- npx -y mbox-mcpClaude Desktop — add to claude_desktop_config.json:
{"mcpServers": { "mbox": { "command": "npx", "args": ["-y", "mbox-mcp"] } } }
Then: *"Open C:\\Takeout\\Mail\\All mail Including Spam and Trash.mbox and tell me about it."*
Tools
| Tool | What it does |
|---|---|
open_archive | Index an .mbox file or .eml directory: message count, date range, top senders |
search_messages | Search by keyword, sender, subject, date range — plus bounded body-text search |
get_message | Fully parse one message: decoded body, headers, attachment names/sizes |
Built for large archives
A Takeout mbox is often multiple gigabytes with 100k+ messages. The design reads the minimum, lazily:
- Streaming index — one pass in 8 MiB chunks, recording byte offsets; only the current message's first 16 KiB is ever held for envelope parsing (sender, subject, date, RFC 2047 decoding).
- Full MIME on demand — reading a message parses just that message (postal-mime: nested multipart, charsets, quoted-printable/base64). Attachments are listed with names and sizes, never dumped into context.
- Honest body search —
body_queryonly full-parses messages that already match your envelope filters, stops at a scan cap, and reports how many it scanned, so the model knows to narrow by sender or date first. - Staleness-aware cache — archives are indexed once per process and re-indexed if the file changes.
Notes and limitations
- mbox variants: Takeout and Thunderbird produce
mboxrd(bodyFromlines are quoted as>From), which splits cleanly. Plainmboxoarchives with unquoted bodyFromlines can over-split. - Attachment *contents* are never returned or written anywhere.
- PST/OST and Maildir are out of scope for now.
Development
npm installnpm test # offline tests — synthetic archives built in-suite npm run build # tsc → dist/ node scripts/smoke.mjs # end-to-end: generates an archive, drives the server over stdio
Architecture: src/archive.ts (streaming indexer, header decoding, envelope filtering) and src/reader.ts (per-message MIME parsing) are pure logic; src/index.ts is the MCP wiring. The test suite includes a chunk-seam property test: indexing with pathological 17-byte chunks must produce an identical index to whole-file reads.
License
MIT