Skills/npm/local-mcp

local-mcp@3.0.440

CAUTION· startup only

Publisher claims: "Let ChatGPT, Claude, Cursor & any MCP client actually use your Mac or Windows PC — read & reply to email, manage your calendar, text over iMessage, find files, work with Teams, Slack, Notion & Office. Runs locally, no API keys." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher colibird-ai · publishing for 233 daysInstalls 18,176Last detonated 8d ago
What would fix thisWatchDispute verdict

Coverage

Startup only; authenticated tool behavior not tested.
Tested
second launch with the clock 45 days ahead · 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: Caution 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

Code inventory arrives with this version's next honeypot run.
It will ask for
unknown until the next run
Where it talks to
unknown until the next run
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

Not enough was observed to say yet. Startup only; authenticated tool behavior not tested. This version's code has not been inventoried for credentials and hosts either; both arrive with its next honeypot run (popular servers first). `vet-skills try local-mcp` runs it now and prints the full answer.

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 (3 scenarios; startup only; authenticated tool behavior not tested) on 2026-11-07 and scored it 68/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Credential pass-through configuration; Credential pass-through configuration; Credential pass-through configuration. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 1 s · 3 scenarios
t+CategoryObserved action
0.4sfilesystemread ~/.local/share/local-mcp/bin/.machine-id-v2 · ~/.local/share/local-mcp/bin/.cloud-token outside project
0.4sprocessexec /usr/bin/date
0.4sprocessexec /usr/bin/timeout
0.4sclaimedno tools/list reply (exit 0)
0.4sprocessscript backend runs setup only
0.5sprocesssecond launch, clock +45 days, CI unset
0.5sprocessexec /usr/bin/faketime
0.6sprocessexec /usr/bin/faketime

Static findings

HIGH
Credential pass-through configurationindex.js:352 · Credential pass-through configuration — agent relays sensitive credentials// #144: without the app, also the relay token, the device key, the Roaming config, logs and caches.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Credential pass-through configurationdownload.js:116 · Credential pass-through configuration — agent relays sensitive credentials// The go-server reads its relay token ONLY from getCacheDir()/.cloud-token, a plain trimmed stringFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Credential pass-through configurationdownload.js:247 · Credential pass-through configuration — agent relays sensitive credentials// 2. the Go client's store; 3. no store and a relay token: the value a 3.0.420 client reportsFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Credential pass-through configurationlink.js:228 · Credential pass-through configuration — agent relays sensitive credentials// lmcp-api#761 §1–2: before link, the binary registers the machine's relay token (without opening theFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Credential pass-through configurationlink.js:230 · Credential pass-through configuration — agent relays sensitive credentials// first_seen exists. The binary keeps the token where it keeps its relay token: the answer never carries it.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Destructive file system command detectedlaunch-event.js:207 · Destructive file system command detected// con undefined si los dos fallan, devuelven basura o pasa el tope. Del cache y del hash delFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
npx invocation of non-well-known packagedownload.js:401 · npx invocation of non-well-known package — may execute untrusted code* update cycle: npx put it back on every spawn — 140 addresses downloaded it 5-49 times a day.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagesetup.js:23 · npx invocation of non-well-known package — may execute untrusted code// doesn't pick up an old npx from its own PATH (common with nvm users whoseFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagesetup.js:4 · npx invocation of non-well-known package — may execute untrusted code* Detecta clientes instalados y escribe la config npx automáticamente.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagelink.js:107 · npx invocation of non-well-known package — may execute untrusted code// the y/n question and by `npx -y local-mcp@latest link --approve|--deny`.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Hidden zero-width characters detectedunconfigure.js:364 · Hidden zero-width characters detected — may conceal contentconst bom = text.startsWith('') ? '' : ''Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
MEDIUM
npx invocation of non-well-known packageindex.js:9 · npx invocation of non-well-known package — may execute untrusted code* npx -y local-mcp@latest setup → wizard de configuración de clientesFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagelink.js:2 · npx invocation of non-well-known package — may execute untrusted code// #125 (decisión «A» de Darío, 2026-10-28): una máquina instalada con npx se vincula a la cuenta de laFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageindex.js:7 · npx invocation of non-well-known package — may execute untrusted code* npx -y local-mcp@latest → arranca el server MCP que trae el paquete (sin descargar nada); enFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageindex.js:10 · npx invocation of non-well-known package — may execute untrusted code* npx -y local-mcp@latest update → dice cómo actualizar (npx -y local-mcp@latest)Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Credential pass-through configurationsetup.js:596 · Credential pass-through configuration — agent relays sensitive credentials// relay token; the tunnel only comes up after approval. A token that already exists is kept: setupFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
npx invocation of non-well-known packagedownload.js:64 · npx invocation of non-well-known package — may execute untrusted code// older keep LocalMCPTray.app. The npx helper is ALSO named LMCP.app but has another bundle id, soFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageindex.js:11 · npx invocation of non-well-known package — may execute untrusted code* npx -y local-mcp@latest uninstall → desinstalaFix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Credential pass-through configurationsetup.js:482 · Credential pass-through configuration — agent relays sensitive credentials// lmcp-api#761 §1–2: the binary registers this installation's relay token (no tunnel) and beats once,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
Process kill commandlaunch-event.js:156 · Process kill command — agent can terminate processes// al server: hoy no la recibe por el wrapper, y sale al cerrarse stdin. Windows queda afuera: un kill ahí no pasa porFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
npx invocation of non-well-known packagesetup.js:22 · npx invocation of non-well-known package — may execute untrusted code// Resolve absolute path to npx from the current Node binary so Claude DesktopFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagepostinstall.js:16 · npx invocation of non-well-known package — may execute untrusted codeprocess.stderr.write('Run manually: npx -y local-mcp@latest setup\n\n')Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Credential pass-through configurationunconfigure.js:519 · Credential pass-through configuration — agent relays sensitive credentials// left on Windows: the relay token and the device key in the Credential Manager, %APPDATA%\Local MCP,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
npx invocation of non-well-known packagedownload.js:132 · npx invocation of non-well-known package — may execute untrusted code// times per `npx … setup` run (once per tracked step); without memoizing,Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagesetup.js:24 · npx invocation of non-well-known package — may execute untrusted code// nvm default points to Node v11/v12 — those npx versions don't support -y).Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagelink.js:81 · npx invocation of non-well-known package — may execute untrusted code// link tries again from the start. npx may have no app, so the text does not name one.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Hidden zero-width characters detectedunconfigure.js:24 · Hidden zero-width characters detected — may conceal contentconst code = text.replace(/^/, ' ').split('')Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
MEDIUM
npx invocation of non-well-known packagepostinstall.js:7 · npx invocation of non-well-known package — may execute untrusted code// Skip si: npx (no global), CI, o el usuario lo desactivóFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagebundled.js:9 · npx invocation of non-well-known package — may execute untrusted code* Authenticode-signed one. Updates arrive with `npx -y local-mcp@latest`.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagelink.js:19 · npx invocation of non-well-known package — may execute untrusted codeconst RESUME = 'npx -y local-mcp@latest link'Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Process kill commandlaunch-event.js:124 · Process kill command — agent can terminate processes// Sin id de máquina: el id de Windows pide un probe de PowerShell. Un SIGKILL, o cualquier kill en Windows, no dejaFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
npx invocation of non-well-known packagelink.js:67 · npx invocation of non-well-known package — may execute untrusted codeconst SETUP_AGAIN = 'npx -y local-mcp@latest setup'Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagepostinstall.js:4 · npx invocation of non-well-known package — may execute untrusted code* No corre cuando se usa npx (npm_config_global no está seteado).Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Credential pass-through configurationsetup.js:594 · Credential pass-through configuration — agent relays sensitive credentials// lmcp-npm#141, lmcp-api#761: Node registers no relay token and writes none. The binary does itFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
npx invocation of non-well-known packageuser-agent.js:2 · npx invocation of non-well-known package — may execute untrusted code// Every outbound HTTP request from npx carries `User-Agent: LMCP-npm/<version> (<platform>)`.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageunconfigure.js:2 · npx invocation of non-well-known package — may execute untrusted code// #48 (2): `npx local-mcp uninstall` quita la entrada `local-mcp` de las configs de los clientes de IAFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagesetup.js:42 · npx invocation of non-well-known package — may execute untrusted code// Write a shell launcher script that wraps npx with a Node version check andFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageunconfigure.js:518 · npx invocation of non-well-known package — may execute untrusted code// lmcp-npm#144 (Darío, 2026-10-24, option 2): uninstalling removes everything npx setup and its serverFix: Pin versions and sources; vendor anything fetched at install time.
AST06

Cost to the agent

Instructions loaded
≈92 tok
1 file · 12 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

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 local-mcp@3.0.440 as of 8d ago. This is the package itself, not its dependencies.

What would make this Verified

12 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Reads credential files≈ +27 on the totalThe sandbox saw reads under ~/.ssh, ~/.aws, ~/.npmrc, ~/.config or similar. Read only files inside the project, and only the ones the task needs. Seen: ~/.local/share/local-mcp/bin/.cloud-token.
  2. Unclaimed publisher≈ +8 on the totalClaim colibird-ai: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Touches files outside the project≈ +7 on the totalKeep reads and writes inside the working directory, or declare the exact paths in `filesystem:` and explain why in the README.
  4. Credential pass-through configuration≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. Destructive file system command detected≈ +4 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  6. Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
Publish a new version to npm, then queue it here. Not your skill? Claim the handle to get verdict changes by email.Claim colibird-aiPropose a patch to the maintainer