excalidraw-mcp-server

Security-hardened MCP server for Excalidraw with API key auth, rate limiting, real-time WebSocket sync, and 14 diagramming tools

→ debu-sinha/excalidraw-mcp-server · listed on glama

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.

Install from

Glama npm

M8ven verifies MCPs across every public registry — install directly from whichever one you prefer.

// key findings

🚨

Secret credentials may flow to a network call

1 flow detected: EXCALIDRAW_API_KEY. We can’t prove the destination matches the brand the credential belongs to.

🚨

Known vulnerabilities in dependencies: 2 critical, 1 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

🔐

You'll be asked for 1 credential: EXCALIDRAW_API_KEY

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

// known CVEs in dependencies2 critical1 high5 medium4 low

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

criticalvitest@2.1.0GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

criticalvitest@2.1.0GHSA-9crc-q9x8-hgqq

Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening

highvite@6.3.5GHSA-p9ff-h696-f583

Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket

mediummermaid@11.12.1GHSA-87f9-hvmw-gh4p

Mermaid: Improper sanitization of configuration leads to CSS injection

mediummermaid@11.12.1GHSA-ghcm-xqfw-q4vr

Mermaid: Improper sanitization of `classDef` in state diagrams leads to HTML injection

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configAUDIT_LOG_ENABLED— true Enable audit logging

configCANVAS_HOST— 127.0.0.1 Canvas server bind address

configCANVAS_PORT— 3000 Canvas server port

configCANVAS_SERVER_URL— "": "http://127.0.0.1:3000"

configCORS_ALLOWED_ORIGINS

🔐 secretEXCALIDRAW_API_KEY— your-key> npm run canvas

configLOG_LEVEL— info Log level: debug, info, warn, error

configMAX_BATCH_SIZE— 100 Maximum elements per batch create

configMAX_ELEMENTS— 10000 Maximum elements on canvas

configPERSISTENCE_ENABLED— false Enable file-based persistence

configRATE_LIMIT_MAX_REQUESTS— 100 Max requests per window (standard tier)

configRATE_LIMIT_WINDOW_MS— 60000 Rate limit window in milliseconds

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// 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

[![M8ven Score](https://m8ven.ai/badge/mcp/debu-sinha-excalidraw-mcp-server-hmh9gl)](https://m8ven.ai/mcp/debu-sinha-excalidraw-mcp-server-hmh9gl)

commit: 89c019df67c912f184c4ae20dc6d11bd490ec9b1

code hash: f1dcd395fb20ce3a775e2ae58f12ae59dbae7a6978e49e5ef4636d1bbe8eda54

verified: 6/14/2026, 11:20:05 AM

view raw JSON →