ylang (Yann-0/ylang) is an MCP server listed on the M8ven Trust Index. It scores 45 out of 100, grade D. It declares 17 tools. No publisher has claimed this listing.

Warning

45/100

9 days ago

ylang

Item: ylang
Rating: 45
Author: M8ven

Local-first personal AI efficiency layer — MCP server for prompt improvement, template library, usage tracking, and scoped memory.

→ Yann-0/ylang · listed on github_code

Warning. Serious findings were identified. Review the full report before connecting. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every push why connect →

Who stands behind it

Yann-0

Source: github_code

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

⚡ Connect GitHub for Live Monitored

Install from

GitHub

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings

🚨

Reads files from sensitive locations

Touches: /srv/ylang/ylang.env, /srv/ylang/ylang.env

🔐

You'll be asked for 1 credential: YLANG_AUTH_TOKEN

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// environment variables

To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.

configYLANG_HOOK_DISABLED

configYLANG_MCP_URL

🔐 secretYLANG_AUTH_TOKENHTTP transport + bearer auth on /mcp, /v1/, and /usage (); /health unauthenticated

configYLANG_RATE_LIMIT_PER_MINUTE

configYLANG_BASE_URL

configYLANG_STORAGE_PATHStorage: SQLite at ~/.ylang/ylang.db (override with )

configYLANG_TRANSPORT

configYLANG_HOST

configYLANG_PORT

configYLANG_AUTH_TOKEN_PREVIOUS

configYLANG_QUALITY_BAND

configYLANG_FALLBACK_MODEL

configYLANG_PROVIDER_COOLDOWN_SECONDS

configYLANG_DAILY_BUDGET_USDActivity-based routing, fallback chain, cooldown, preference boost; daily budget cap enforced when is set

configYLANG_CAPTURE_LEVEL

configYLANG_HOOK_TIMEOUT_SEC

configCURSOR_PROJECT_DIR

configYLANG_LAST_TRACE_ID

configYLANG_SESSION_ID

configYLANG_WORKSPACE

configYLANG_HOOK_MODEL

configCURSOR_TRANSCRIPT_PATH

configOLLAMA_HOST

configDISPLAY

configWAYLAND_DISPLAY

configYLANG_ENV_FILE

configYLANG_LOG_FORMAT

configYLANG_MODEL_ALIASES_PATH

configYLANG_RETRIEVAL_EFFECTIVENESS_WEIGHT

configYLANG_RETRIEVAL_PREFERRED_TEMPLATE_IDS

configYLANG_IMPROVER_CRITIQUE

configYLANG_EXPERIMENTS

configYLANG_IMPROVER_TIMEOUT_SEC

configYLANG_PATTERN_DETECTOR

// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

17/17 tools missing one or more hints — create_experiment_variant (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); improver_analytics (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); template_effectiveness_report (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +14 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

No access to sensitive paths

Reads sensitive paths: /srv/ylang/ylang.env, /srv/ylang/ylang.env

Remove reads of sensitive system paths. If you genuinely need them, document why in the README.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail

The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.

// improvement guidance — verified publishers only

We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Verified](https://m8ven.ai/badge/mcp/yann-0/ylang?variant=verified)](https://m8ven.ai/mcp/yann-0/ylang)

Shows verification status without the grade. Want the grade badge instead? Remove ?variant=verified from the URL.

commit: 6163eb09b6779b9c62d7fcc06664ff7562b060e8

code hash: c0d297aa7b04f273481bbf17f678631910529b70f98d34b2b179c3eb9d0ec5d7

verified: 9/3/2026, 5:12:28 PM

view raw JSON →

Check MCPs from inside your assistant

Tool Check · MCP

Vetting this one by hand? Tool Check is an MCP that scores other MCPs. Add it once and ask Claude, ChatGPT, or any MCP client to grade a server, surface CVEs, check the publisher, and suggest safer alternatives — before you install.

https://m8ven.ai/api/mcp/tool-check

check_toolsearch_toolscompare_toolsrecommend_alternativescheck_publisherreport_concern

How to add it →Free · no account needed · works in any MCP client