Skills/PyPI/mcp-switchboard-client

mcp-switchboard-client@0.2.0

VERIFIED· not started

Publisher claims: "Tunnels local stdio MCP servers to an mcp-switchboard hub over one outbound WebSocket" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher akospapp · publishing for 59 daysInstalls 178Last detonated 5d ago
$claude mcp add mcp-switchboard-client -- uvx mcp-switchboard-client
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Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

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 gofastmcp.com — 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
server startup · the tool list · tool behavior

Connect it under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- uvx mcp-switchboard-client

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; not started: dependency install failed; the server itself was not observed) on 2026-11-10 and scored it 83/100 (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 · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1 ·
0.1sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.1sprocessscript backend runs setup only
0.1sprocessno install scripts to re-run

Static findings

HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/config.py:101 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesraise ConfigError(f"mcpServers.{name}.env in {config_path} must be an object")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/cli.py:142 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"""Resolve flags + env + .env into Settings, or raise ConfigError."""Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/envconf.py:1 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"""Settings from the process environment and an optional .env file.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/cli.py:4 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesseeded from a .env file, and every one of them can be overridden by a commandFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/cli.py:37 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesDEFAULT_ENV_FILE_NAME = ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/envconf.py:37 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesminimal, matching the .env files people hand-write for this tool.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_switchboard_client/cli.py:5 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesline flag. Real environment variables win over the .env file; flags win overFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
URL with embedded credentialstests/test_settings.py:160 · URL with embedded credentials — may be phishing or credential leaking("https://user:[email protected]", "wss://user:[email protected]/tunnel/v1"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
Access to sensitive file pathstests/conftest.py:18 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filescannot roll back, and the repo's own .env would otherwise leak into tests.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Process kill commandsrc/mcp_switchboard_client/supervisor.py:181 · Process kill command — agent can terminate processesexcept Exception as e: # noqa: BLE001 - one bad line must not kill the readerFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Access to sensitive file pathstests/test_settings.py:1 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"""Flags vs. environment vs. .env, and hub URL normalization."""Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Process kill commandsrc/mcp_switchboard_client/tunnel.py:389 · Process kill command — agent can terminate processesexcept Exception as e: # noqa: BLE001 - a dropped frame must not kill a serverFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Access to sensitive file pathstests/test_settings.py:99 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesmonkeypatch.chdir(tmp_path) # no ./.env hereFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈63 tok
1 file · 17 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 mcp-switchboard-client@0.2.0 as of 5d ago. This is the package itself, not its dependencies.