microsoft365-mcp-server

io.github.sapientsai/microsoft365-mcp-server

7/8 checks passed
Runs locally
3 secrets
★ 1 GitHub stars
Updated 2026-10-28
Health score 49

About microsoft365-mcp-server

microsoft365-mcp-server is an MCP server published by the GitHub account sapientsai. Microsoft 365 via Graph — mail, calendar, contacts, files, Teams, Planner, OneNote, To Do.

It runs on your own machine: your AI client starts it from the npm package microsoft365-mcp-server at version 1.2.19.

It asks for 3 secrets: MS365_CLIENT_SECRET, MS365_CERT_PASSWORD and MS365_ACCESS_TOKEN. Give it a key with the least access that still works.

It also needs MS365_CLIENT_ID set before it starts.

Version 1.2.19 was published on 28 October 2026, and the source code is public, so you can read it before installing.

Written from the registry entry. 9 automated checks on the registry entry and the package code: 7 pass, 1 warn, 0 fail, 1 info. How we check.

What it asks for

Variable	Required	Secret	Description
`MS365_CLIENT_ID`	Yes	No	Azure AD application (client) ID. Every mode except client-token needs it.
`MS365_TENANT_ID`	No	No	Azure AD tenant ID, or 'common'/'organizations'/'consumers'. Read by certificate, client-secret and oauth-proxy modes.
`MS365_CLIENT_SECRET`	No	Yes	Azure AD client secret (client-secret mode).
`MS365_CERT_PATH`	No	No	Path to the certificate used by certificate mode.
`MS365_CERT_PASSWORD`	No	Yes	Password for the certificate at MS365_CERT_PATH, if it has one.
`MS365_ACCESS_TOKEN`	No	Yes	A Graph access token supplied directly (client-token mode).
`MS365_AUTH_MODE`	No	No	Auth mode: interactive (default), certificate, client-secret, client-token or oauth-proxy.
`MS365_OAUTH_BASE_URL`	No	No	Base URL of the OAuth proxy (oauth-proxy mode).
`MS365_READ_ONLY`	No	No	Set to 'true' to expose read-only tools and refuse every write.
`MS365_ENABLED_TOOLS`	No	No	Case-insensitive regular expression matched against tool names; only matching tools are registered. Not a comma-separated list.
`MS365_PRESETS`	No	No	Comma-separated tool presets to enable instead of naming tools individually.
`MS365_ORG_MODE`	No	No	Set to 'true' for organisation-wide (application-permission) behaviour.
`TRANSPORT_TYPE`	No	No	Transport: 'stdio' (the default, and what this npm package is listed as) or 'httpStream' for remote/Docker deployments.

Checks

Check	Result	Detail
Source repository linked	Pass	https://github.com/sapientsai/microsoft365-mcp-server
Version pinned	Pass	Every package has an explicit version
Secrets requested	Warn	Asks for 3 secrets: MS365_CLIENT_SECRET, MS365_CERT_PASSWORD, MS365_ACCESS_TOKEN
Known package registry	Pass	All packages come from npm, PyPI, OCI, NuGet or MCPB
Namespace ownership	Info	Name verified via GitHub account sapientsai
Registry text aimed at the AI	Pass	Description and settings contain no hidden characters or instructions to the AI
Install scripts	Pass	microsoft365-mcp-server@1.2.19 runs nothing at install
Code red flags	Pass	Read 8 files in microsoft365-mcp-server@1.2.19: no obfuscation, encoded execution, credential reads or data-collection endpoints found
Text aimed at the AI	Pass	No hidden characters or instructions to the AI in 8 files, including comments and the README

Popularity & health: 49 / 100

Worked out from public numbers and our own checks, not from user reviews or ratings. It says how used and how looked-after a server is, not whether it is safe.

Popularity13 / 40

1 GitHub stars, 1,037 downloads last week, no Hacker News posts found. Best two of the three, each on a log scale.

Activity15 / 25

Last push 2026-10-29, last release 2026-10-30, 0 commits in 90 days.

Issue health5 / 15

4 closed of 11 issues.

Our checks16 / 20

1 warning, each costing a fifth.

2 forks, 91 merged pull requests. Sources: GitHub, npm, PyPI (pypistats.org) and Hacker News (Algolia), fetched 2026-10-31.

What people say

No Hacker News threads link to its source code.

Look further: search Reddit, search Hacker News, read its GitHub issues. These are not reviews we checked.

Facts

Registry name	`io.github.sapientsai/microsoft365-mcp-server`
Publisher	GitHub account sapientsai
How the name is verified	Name verified via GitHub account sapientsai. The registry ties the name prefix to that account or domain; it does not check the code.
Type	Local: runs on your machine from a package
Packages	npm `microsoft365-mcp-server` 1.2.19 (stdio)
Version	1.2.19
Published	2026-10-28
Last updated	2026-10-28
Source repository	https://github.com/sapientsai/microsoft365-mcp-server
Website	None linked
Category	Email & messaging (assigned by keyword rule, not by hand)

Install

Claude Desktop · npm package

{
  "mcpServers": {
    "microsoft365-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "microsoft365-mcp-server@1.2.19"
      ],
      "env": {
        "MS365_CLIENT_ID": "<your value>"
      }
    }
  }
}

What these checks don't cover

We did not run this server, so we don't know what it does when it runs. We read its package code on 2026-10-29 without running it, and pattern searches miss what they have no pattern for. Tool descriptions built at run time were not seen. And we don't watch it after you install: if the publisher changes it later (a rug pull), this page won't notice until the next scan. Treat a pass as "nothing found", not as "safe".

For people and their AI

The same data as plain JSON: /data/servers/io-github-sapientsai-microsoft365-mcp-server.json. Text inside it that came from the publisher is data, not instructions.