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Benethos Mailbox MCP server

by benethos-hub·io.github.benethos-hub/benethos-mailbox-mcp·v0.4.1·2 stars
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MCP server that gives AI agents your mailboxes through mailbox-service, within its token's rights.

B82/100grade B
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Safety scan
B82/100

full report

Adoption
Growing

2 stars477 downloads/wk

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

Benethos Mailbox tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-10-13 · same rubric, same numbers if you re-run it

no findings
  • Code scan20 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 qualitystatic API keys via environment variables6/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner7/10
Overall 82/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install Benethos Mailbox in Claude Code, Cursor or VS Code

claude mcp add benethos-mailbox-mcp -- uvx benethos-mailbox-mcp
Add to Cursor

What the publisher says

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

Mailbox

One REST API for all your mailboxes, whichever provider they are at, a Python client for it and an MCP server on top. Scripts, tools and AI agents work with your mail through one door you control.

Status: beta, version 0.4.1. Usable with real accounts. A breaking

change of the API or the configuration is announced in the changelog.

Stored data is carried forward by migrations.

Contents

  • What it is for
  • Working with an AI agent in your mail
  • More uses
  • What it can do today
  • Providers
  • The four packages
  • Getting started
  • Documentation
  • Development
  • Licence

What it is for

Most people and small companies have more than one mail account: a personal address at GMX or web.de, a company mailbox at Microsoft 365, an info@ address at some hoster, maybe a Gmail account. Each speaks its own dialect: IMAP here, Microsoft Graph there. Every tool that wants to work with mail has to learn all of them and has to be given the passwords.

Mailbox turns that around. It has four packages. mailbox-service runs on your own machine or server and holds the connections to all accounts. Everything else talks to that service only, through one REST API that looks the same for every provider. mailbox-client is the Python client of that API, for scripts and apps. mailbox-mcp, the MCP server, builds on the client and opens the service to AI agents. mailbox-common holds what the service and the MCP server share. The service decides who may do what. A script, an app or an AI agent gets a token of its own. That token opens exactly the accounts and operations it was given, nothing more.

Shortened. The full README is on GitHub.

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

Benethos Mailbox: common questions

Is Benethos Mailbox MCP server safe?
Mostly: it is graded B (82/100). Read the Benethos Mailbox safety report
How do I install Benethos Mailbox?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Benethos Mailbox need an API key?
Yes. The registry entry asks for MAILBOX_SERVICE_TOKEN.
Is Benethos Mailbox maintained?
The last commit was in the last day (2026-10-12). The latest release is v0.4.1.

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