Skills/PyPI/jcodemunch-mcp

jcodemunch-mcp@1.108.428

VERIFIED· not started

Publisher claims: "MCP server that gives AI coding agents the exact function or class they asked for, not the whole file. Runs on your machine, 70+ languages. Free for non-commercial use; commercial use needs a one-time license." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher jgravelle · publishing for 257 daysInstalls 29,414Last detonated 5d ago
$claude mcp add jcodemunch-mcp -- uvx jcodemunch-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
GH_TOKENGITHUB_TOKENGROQ_API_KEYJCODEMUNCH_HTTP_TOKENJCODEMUNCH_LICENSE_KEYJCODEMUNCH_REDACT_RESPONSE_SECRETSConfiguration, not credentials: CODE_INDEX_PATH, GITHUB_REPOSITORY, GITHUB_RUN_ID, JCODEMUNCH_ALLOW_PAID_SUMMARIES, JCODEMUNCH_CLIENT_ID, JCODEMUNCH_ENFORCE, JCODEMUNCH_HEARTBEAT_SECONDS, JCODEMUNCH_NO_VERSION_HINT, JCODEMUNCH_ORG_ENDPOINT, JCODEMUNCH_ORG_ID, JCODEMUNCH_SUMMARIZER_PROVIDER, JCODEMUNCH_TOOL_SURFACE, OPENAI_API_BASE, PIPX_HOME, WATCHFILES_FORCE_POLLING
Where it talks to
jcodemunch.com (its own)Also bford.info, groq.com, ffmpeg.org, gravelle.us — 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 bford.info, groq.com, ffmpeg.org, gravelle.us as well as its own vendor. The guard injects GH_TOKEN, GITHUB_TOKEN, GROQ_API_KEY, JCODEMUNCH_HTTP_TOKEN, JCODEMUNCH_LICENSE_KEY, JCODEMUNCH_REDACT_RESPONSE_SECRETS only into requests to jcodemunch.com (and its subdomains) and refuses the rest.

$vet-skills run --secrets GH_TOKEN=jcodemunch.com,GITHUB_TOKEN=jcodemunch.com,GROQ_API_KEY=jcodemunch.com,JCODEMUNCH_HTTP_TOKEN=jcodemunch.com,JCODEMUNCH_LICENSE_KEY=jcodemunch.com,JCODEMUNCH_REDACT_RESPONSE_SECRETS=jcodemunch.com -- uvx jcodemunch-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 2026-11-09 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

MEDIUM
Python subprocess execution detectedscripts/pr_bench_comment.py:31 · Python subprocess execution detectedp = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/surface_diff.py:78 · Python subprocess execution detectedout = subprocess.check_output(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/gap_ledgers.py:425 · Python subprocess execution detectedout = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/pr_bench_comment.py:250 · Python subprocess execution detectedsubprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/surface_diff.py:74 · Python subprocess execution detectedsubprocess.run(["git", "worktree", "remove", "--force", str(wt)], cwd=REPO)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/surface_diff.py:66 · Python subprocess execution detectedsubprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File type combined with upload actionscripts/pr_bench_comment.py:4 · File type combined with upload action — agent may exfiltrate local data files--benchmark BENCH.json --pr N [--post] [--summary FILE]`Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Python subprocess execution detectedscripts/open_regression_issue.py:34 · Python subprocess execution detectedp = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/surface_diff.py:47 · Python subprocess execution detectedp = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
HIGH
Access to sensitive file pathssrc/jcodemunch_mcp/security.py:114 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesPrevents path traversal attacks (e.g., ../../etc/passwd) andFix: 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/jcodemunch_mcp/security.py:248 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesflagged; an actual credential file (``.env``, ``*.pem``, ``secrets/db.yaml``,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedscripts/pr_bench_comment.py:233 · Python subprocess execution detectedsubprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/release_preflight.py:70 · Python subprocess execution detectedp = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/dod_changelog.py:25 · Python subprocess execution detectedreturn subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/pr_bench_comment.py:218 · Python subprocess execution detectedexisting = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/pr_bench_comment.py:284 · Python subprocess execution detectedhead = subprocess.check_output(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Instructs the agent to modify its persistent memory or instruction filessrc/jcodemunch_mcp/cli/init.py:814 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file"""Write ./AGENTS.md with the plan_turn(model=...) directive.Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/tools/digest.py:74 · Python subprocess execution detectedr = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/windowless.py:157 · Python subprocess execution detectedproc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/git_hook.py:46 · Python subprocess execution detectedout = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/upgrade.py:161 · Python subprocess execution detectedr = subprocess.run(pip_args, check=False)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File type combined with upload actionsrc/jcodemunch_mcp/cli/init.py:1733 · File type combined with upload action — agent may exfiltrate local data files"Write .github/hooks/hooks.json with a jcodemunch postToolUse rule",Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionsrc/jcodemunch_mcp/cli/init.py:1067 · File type combined with upload action — agent may exfiltrate local data fileshooks.json already exists, the postToolUse rule is appended only ifFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/watcher.py:1812 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/init.py:2568 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/groq/explainer.py:369 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Process kill commandsrc/jcodemunch_mcp/parent_watch.py:136 · Process kill command — agent can terminate processesanswer would kill a live client's server."""Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Process kill commandsrc/jcodemunch_mcp/progress.py:218 · Process kill command — agent can terminate processesidle timeout killed it and the kill read as a crash.Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File type combined with upload actionsrc/jcodemunch_mcp/surface_offer.py:74 · File type combined with upload action — agent may exfiltrate local data files``benchmarks/schema_baseline.json`` -- compute, never quote.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
LOW
Instructs the agent to modify its persistent memory or instruction filessrc/jcodemunch_mcp/cli/init.py:698 · Instructs the agent to modify its persistent memory or instruction files · informational: not an instruction file"""Append the Code Exploration Policy to CLAUDE.md.Fix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
File permission modification commandsrc/jcodemunch_mcp/cli/git_hook.py:155 · File permission modification command — agent changes file ownership/permissionslogger.debug("chmod failed for %s", path, exc_info=True)Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/init.py:559 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/hook_event.py:144 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/init.py:1907 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File type combined with upload actionsrc/jcodemunch_mcp/cli/init.py:1046 · File type combined with upload action — agent may exfiltrate local data files"""Whether a Copilot hooks.json rule is OUR postToolUse rule.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/cli/upgrade.py:110 · Python subprocess execution detectedr = subprocess.run(init_cmd, check=False, env=dict(os.environ, **{UPGRADE_REFRESH_ENV: "1"}))Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Process kill commandsrc/jcodemunch_mcp/watcher.py:273 · Process kill command — agent can terminate processes"""Base exception for watcher errors that should not kill the embedding process."""Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedscripts/surface_diff.py:88 · Python subprocess execution detectedreturn subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/hook_event.py:55 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/watch_scope.py:120 · Python subprocess execution detectedout = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/hook_event.py:170 · Python subprocess execution detectedsubprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/jcodemunch_mcp/hook_event.py:158 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05

Cost to the agent

Instructions loaded
≈92 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 jcodemunch-mcp@1.108.428 as of 5d ago. This is the package itself, not its dependencies.