Skills/PyPI/nimbus-mcp

nimbus-mcp@0.14.21

VERIFIED· not started

Publisher claims: "MCP server bridging AI agents to Nimbus BCI pipelines (device-flow login, desktop auto-discovery, or API key)" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher nimbusbci · publishing for 44 daysInstalls 3,944Last detonated 32 h ago
$claude mcp add nimbus-mcp -- uvx nimbus-mcp
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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
SENTRY_DSNConfiguration, not credentials: NIMBUS_API_URL, NIMBUS_MCP_HOST, NIMBUS_MCP_PATH, NIMBUS_MCP_PORT, NIMBUS_MCP_TELEMETRY, NIMBUS_MCP_TELEMETRY_FILE, NIMBUS_MCP_VERSION_CHECK, NIMBUS_MCP_VERSION_CHECK_FILE, SENTRY_ENVIRONMENT, SENTRY_TRACES_SAMPLE_RATE
Where it talks to
nimbusbci.com (its own)Also fly.dev, posthog.com, tigris.dev — 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 with a scoped credential, under the guard, and read the third-party hosts first. The code names fly.dev, posthog.com, tigris.dev as well as its own vendor. The guard injects SENTRY_DSN only into requests to nimbusbci.com (and its subdomains) and refuses the rest.

$vet-skills run --secrets SENTRY_DSN=nimbusbci.com -- uvx nimbus-mcp

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 2026-11-13 and scored it 84/100 (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
0.2sprocessno install scripts to re-run

Static findings

HIGH
Access to sensitive file pathssrc/nimbus_mcp/config.py:11 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import DEFAULT_API_URL, resolve_credentialFix: 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/nimbus_mcp/oauth.py:39 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import decode_token_claimsFix: 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/nimbus_mcp/hosted.py:232 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import decode_token_claimsFix: 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/nimbus_mcp/cli.py:34 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import (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/nimbus_mcp/cli.py:43 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import logout as remove_storeFix: 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/nimbus_mcp/access.py:279 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import decode_token_claimsFix: 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/nimbus_mcp/tools/whoami.py:14 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom ..credentials import decode_token_claims, token_access_summaryFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
URL to a private-network addresstests/unit/test_credentials.py:557 · URL to a private-network address — a LAN or development targetenv={"NIMBUS_MCP_KEY_FILE": str(key_file), "NIMBUS_API_URL": "http://10.0.0.5:8080"},Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
HIGH
Access to sensitive file pathssrc/nimbus_mcp/setup_mode.py:15 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesfrom .credentials import decode_token_claimsFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
File type combined with upload actiontests/unit/test_tools_data.py:159 · File type combined with upload action — agent may exfiltrate local data files200, json={"ok": True, "path": "user_x/rec.csv", "message": "Upload deleted"}Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07

Cost to the agent

Instructions loaded
≈64 tok
1 file · 81 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 nimbus-mcp@0.14.21 as of 31 h ago. This is the package itself, not its dependencies.