Excalidraw MCP Server (valeriyproklov/excalidraw-zephy) is an MCP server listed on the M8ven Trust Index. It scores 46 out of 100, grade D. It declares 6 tools. No publisher has claimed this listing.

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D
Caution
46/100

Excalidraw MCP Server

Run a live Excalidraw canvas and control it from AI agents.

→ valeriyproklov/excalidraw-zephy· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

⚡ Live Monitored: not connected

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Who stands behind it

valeriyproklov

Source: Glama

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Install from

Glamanot scored here

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
🚨
Secret credentials may flow to a network call
1 flow detected: RENDERER_KEY. We can’t prove the destination matches the brand the credential belongs to.
⚠️
Known vulnerabilities in dependencies: 6 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
🔐
You'll be asked for 2 credentials: ADMIN_API_KEY, RENDERER_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// tools this server exposes6 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

set_room

Pin or switch the active Excalidraw room for this session, or — with no arguments — report the current room. Pass a full roomUrl (https://<host>/r/<id>), or a bare roomId plus optional expressUrl for the server origin. Every other tool operates on the pinned room; you can also override a single call…

create
update
delete

Delete elements by `id`, `ids`, or a `query` (type/filter/bbox). Pass all:true to clear the entire canvas.

read
screenshot

Render the current canvas headlessly to an image and return it inline (png default, or svg). Frame and size it with bbox {x,y,w,h}, scale (0-4], and maxDim (100-8000, a longest-edge pixel cap). The renderer sidecar makes this work even with no browser tab open in the room.

// known CVEs in dependencies6 high7 medium3 low

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.15.1GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.15.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.15.1GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

highws@8.18.3GHSA-96hv-2xvq-fx4p

ws: Memory exhaustion DoS from tiny fragments and data chunks

highvite@6.4.1GHSA-fx2h-pf6j-xcff

vite: `server.fs.deny` bypass on Windows alternate paths

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// 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.
🔐 secretADMIN_API_KEY
configAUTO_SNAPSHOT_INTERVAL_MS
configAUTO_SNAPSHOT_KEEP
configDATA_DIR
configENABLE_CANVAS_SYNCtrue
configEXCALIDRAW_EXPORT_DIR
configEXPRESS_SERVER_URLMCP server: exposes MCP tools over stdio; syncs to the canvas via
configHOST
configINTERNAL_CANVAS_URL
configLOG_FILE_PATH
configLOG_LEVEL
configMCP_AGENT_COLOR#1971c2 stroke
configMCP_AGENT_CURSORtrue
configMCP_AGENT_NAMEMCP Agent
configMCP_REQUIRE_AUTH
configNO_COLOR
configPERSIST_DEBOUNCE_MS
configPUBLIC_BASE_URL
🔐 secretRENDERER_KEY
configRENDERER_URL
configROOT_REDIRECT_URL
configSYNC_DEBUG
configWAL_FSYNC
Deployment configuration, supplied by whoever hosts the server. Users are not asked for these.
deployPORT
// 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

6/6 tools missing one or more hints — set_room (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); update (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 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.

Tool test coverage

Only 0/6 tools referenced in tests (0%)

Write tests that reference each tool by name so every tool has at least one test.

Secrets stay with their owner

1 secret sent to a request target we could not resolve (RENDERER_KEY → dynamic) — often a configured endpoint, not necessarily third-party

Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.

Production dependencies are patched

0 critical, 4 high severity in production deps — @modelcontextprotocol/sdk@1.15.1 (high), @modelcontextprotocol/sdk@1.15.1 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Dev dependencies

2 critical/high in dev-only deps (does not ship to users)

Upgrade dev dependencies when convenient.

Dependency freshness

1/9 production deps stale: node-fetch@2023-11-30 (2.8y)

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 6 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
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commit: f07eb76081a30e042147acd6673c819e01aba0d2
code hash: 7c6ea6ed3237eec53b743ce907e6b2226726be96a78d451b0a76ac5bb94267d0
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