mcp-teams@0.3.52
VERIFIED· startup onlyPublisher claims: "MCP server that lets AI assistants work with Microsoft Teams (web) through a Chrome/Edge extension bridge" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
Coverage
Startup only; authenticated tool behavior not tested.- Tested
- server startup over stdio (initialize sent) · every file read, file written and host contacted by what ran
- Not tested
- the tool list (the server exited before answering) · what the tools do when called with real credentials
What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.
Before you give it your token
- It will ask for
- no credential variables read in the code
- Where it talks to
- no vendor host named in the codeAlso cloud.microsoft, microsoft.com, office.com, cursor.invalid — not the publisher's domain; check what for before connecting.
- What the honeypot saw
- no credential files read · no network
- What we could not test
- the tool list (the server exited before answering) · what the tools do when called with real credentials
Connect it under the guard. Startup only; authenticated tool behavior not tested. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.
Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.
Is [email protected] safe to install?
KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; startup only; authenticated tool behavior not tested) on 2026-11-09 and scored it 80/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.
Behavior trace
Honeypot run · 31 s · 2 scenariosStatic findings
/** The package from npm, always the latest release (npx keeps it cached). */Fix: Pin versions and sources; vendor anything fetched at install time.* The AI app may kill the process soon after, so this stays short, and is not made longer for aFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.- It opens the Extensions page of Chrome and/or Edge, and that folder. The one manual step is in the browser you use Teams in: turn on *Developer mode* and click *Load unpacked* on the folder.Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.- It opens the Extensions page of Chrome and/or Edge, and that folder. The one manual step is in the browser you use Teams in: turn on *Developer mode* and click *Load unpacked* on the folder.Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.…h reload_extension (it loads the version mcp-teams put in its folder), or run \`npx mcp-teams setup\` if it was loaded from another folder, then send again.`, }); /** True w…Fix: Pin versions and sources; vendor anything fetched at install time.console.log("AI apps on this computer:");Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.if (!secret) return refuse("This copy of the extension has no pairing file. Run `npx mcp-teams setup` and load the extension from the folder it shows.");Fix: Pin versions and sources; vendor anything fetched at install time.* How AI apps start this server. Installed from npm (`npx mcp-teams setup`, or aFix: Pin versions and sources; vendor anything fetched at install time.<summary class="muted">Advanced</summary> <div class="row"> <label for="token">Pairing token (only for a copy not loaded from the folder setup shows)</label> <iFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.lastError = "The MCP server refused this extension. Run `npx mcp-teams setup` and load the extension from the folder it shows.";Fix: Pin versions and sources; vendor anything fetched at install time.// release (npx fetches it on start) updates the installed folder, never downgrading it (anFix: Pin versions and sources; vendor anything fetched at install time.Cost to the agent
Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.
Known vulnerabilities
No advisories in OSV for mcp-teams@0.3.52 as of 5d ago. This is the package itself, not its dependencies.