sysketch MCP Server

by tonys-codingio.github.Tonys-Coding/sysketchv0.5.0

MCP server for sysketch: lets Claude, Cursor and other AI clients draw polished system design diagrams for ~100 tokens a call.

1Node.jsstdioremoteofficial registry

context tax

~477 tok/turn2 tools

security

100/100

cold start

pending

freshness

Active2d ago

Our reading of sysketch, from the data

sysketch is a ai & llm tools MCP server from tonys-coding, listed in the official MCP Registry.

Its 2 tools add about 478 tokens to every model turn, lighter than the ai & llm tools median of 1,210 tokens across 137 measured servers (measured 2026-10-19).

Maintenance is active: the last public signal was 2 days ago (2026-10-17). For comparison, 59% of ai & llm tools servers are active or maintained.

With 1 GitHub stars it ranks #978 of 3,169 ai & llm tools servers we index.

It runs either locally over stdio or as a hosted endpoint.

Install sysketch MCP server

claude mcp add tonys-coding -- npx -y sysketch-mcp

{
  "mcpServers": {
    "tonys-coding": {
      "command": "npx",
      "args": [
        "-y",
        "sysketch-mcp"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "tonys-coding": {
      "command": "npx",
      "args": [
        "-y",
        "sysketch-mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "tonys-coding": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "sysketch-mcp"
      ]
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "tonys-coding": {
      "command": "npx",
      "args": [
        "-y",
        "sysketch-mcp"
      ]
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Remote endpoints

streamable-httphttps://sysketch.vercel.app/mcp

Context tax

Connecting this server adds ~478 tokens of tool definitions to every model turn (lean, 2 tools). Measured 2026-10-19 via its hosted endpoint; o200k tokenizer, worst case for clients that load all tools up front. How we measure

Model	Per 1,000 turns	With prompt caching
Claude Opus 5.5	$1.91	$0.096
Claude Sonnet 5.5	$0.956	$0.096
Claude Haiku 5.5	$0.048	—

Input prices as of 2026-10-06. Excludes your own prompt and output.

Tools (2)

render_diagram375 tok
Use for any system design, architecture, data-flow or infrastructure diagram, instead of generating an image or writing SVG/Mermaid. Renders a tiny YAML spec; returns PNG/SVG links and a small preview. Spec keys: title, type (sequence: message timeline), theme (sketch|graphite|blueprint|midnight|classic), direction (omit: auto-fit; right|down only if asked), steps (false hides numbers), legend (true lists steps), nodes {id: "icon | Label | subtitle"}, groups {Label: [ids or group labels to nest]}, edges ["a > b > c | label", "a ..> b" dashed, "a <> b" two-way, "a => b" thick, "a -- b" line, "a
list_icons63 tok
List sysketch icon names and aliases, or search the available product logos.

Security signals

100/100 — no known issues found as of 2026-10-19, from the checks below. This is not a guarantee of safety; review what a server can do before connecting it.

Deductions

No findings from the checks that ran.

Checks

✓Repository hygiene (archived, activity, license, security policy)
✓Tool descriptions (prompt-injection and hidden-text heuristics)
○Package metadata (install scripts, provenance) — pending
○Source scan (secrets, CVEs, risky code) by vectra-guard — pending

Scan it yourself before installing with vectra-guard, the open-source agent security CLI. Scoring rules

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-17 · 2d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-17 · 2d ago · official registry · v0.5.0

How it compares in AI & LLM Tools

Against the most-starred ai & llm tools servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
sysketch (this)	1	2	477	Active	local + hosted
Memory	91,356	—	not measured	Active	local
Claude Flow	76,638	—	not measured	Active	local
Next AI Draw.io	36,318	—	not measured	Active	local
Serena Agent	30,371	—	not measured	Active	local
Trycua	30,160	—	not measured	Active	—

All ai & llm tools MCP servers

FAQ

›How do I install the sysketch MCP server in Claude Code?

Run: claude mcp add tonys-coding -- npx -y sysketch-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does sysketch require an API key?

No required environment variables are declared in its published metadata.

›Can I use sysketch as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is sysketch in the official MCP registry?

Yes, as io.github.Tonys-Coding/sysketch.

›How many tokens does sysketch add to my context?

Its tool definitions total about 477 tokens, resent on every turn.

Sources and method

Official MCP Registry entry: updated 2026-10-17
GitHub repository: fetched 2026-10-19
Package registry (npm / PyPI): listed
Tool list (tools/list), measured by us: 2026-10-19
Security signals, computed by us: 2026-10-19
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.