Is Mu MCP server safe?
Yes, with the usual care.
Safe to use. Minor gaps such as a missing repository or slower maintenance.
What to know before installing
- highWrite-action tools reachable without authentication
How Mu compares
Against every graded Productivity MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 84/100
- higher than 67% of 1,293 Productivity servers
- Tools that change things
- 19%
- typical: 0%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote Productivity server answers 100%
What its tools let an agent do: 123 read · 9 create · 32 change · 2 delete · 2 send or post · 2 run or deploy
Public scan report
scanner v0.1.10 · 2026-11-05 · same rubric, same numbers if you re-run it
1 high
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 1392ms20/20
- Tool poisoning170 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 32 write-action tools with no auth3/15
- Maintenancelast push 1 days ago15/15
- Maintainer identityregistry namespace matches repository owner; GitHub account older than a year; website matches verified namespace10/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
Overall 84/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON
Other servers that do what Mu does
AIquila — Nextcloud MCP ServerNextcloud MCP server — 384 tools: files, calendar, contacts, mail, Talk, Deck, photos, maps, notesnot reviewedEstablishedC- iCloud MCPApple Mail, Calendar, Contacts, Reminders, Notes, Messages and Safari via AppleScript or iCloudnot reviewedEstablishedB
- Apple Tools (Unified)Unified Apple ecosystem MCP server for macOS: Mail, Calendar, Notes, Files, Messages, and more.not reviewedEstablishedA
