Uisandbox MCP Server

Play with your app's design. Right in the browser. Drop your build, turn the knobs, export the code. It runs locally over stdio via the published package.

People connecting design tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-24 · ★ 6 · #30 OF 74 MAINTAINED DESIGN · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Uisandbox

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add alexanderkaan-uisandbox -- npx -y uisandbox-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "alexanderkaan-uisandbox": {
      "command": "npx",
      "args": [
        "-y",
        "uisandbox-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

repo age created 2026-08-18 - young repo, little track record yet

license MIT - declared in the repository

npm package uisandbox-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.AlexanderKaan is GitHub-verified and matches the repo owner

03 · What Uisandbox can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.3.2 · 2026-08-20

UISandbox 0.3.2 - uisandbox.org · npm [email protected] (npx -y uisandbox-mcp) · on the MCP registry. Restyle your app without rebuilding it - play with your real app's design, live.

v0.3.1 · 2026-08-19

UISandbox 0.3.1 - uisandbox.org · npm [email protected] (npx -y uisandbox-mcp) · on the MCP registry. Restyle your app without rebuilding it - play with your real app's design, live.

v0.3.0 · 2026-08-19

UISandbox 0.3.0 - first public release · Restyle your app without rebuilding it. Drop a built web app; it renders 1:1 in a service-worker sandbox, every CSS literal becomes a knob, and the change exports as CSS, JSON…

04 · Who maintains Uisandbox

UISandbox is maintained by alexanderkaan. We track 2 MCP servers from alexanderkaan - 1 actively maintained, 6 combined GitHub stars, oldest repo from Jun 2026.

05 · Facts

repository: github.com/alexanderkaan/uisandbox
website: https://uisandbox.org/
category: design - ranked #30 of 74 actively-maintained design servers as of 2026-08-25.
release cadence: 3 releases in the last 90 days (latest 2026-08-20)
registry: io.github.AlexanderKaan/uisandbox (active, first published 2026-08-19 · 4 versions)
packages: npm:uisandbox-mcp

06 · Uisandbox FAQ

What is Uisandbox?

Play with your app's design. Right in the browser. Drop your build, turn the knobs, export the code. It runs locally over stdio via the published package.

Is Uisandbox still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-24 and it shipped 3 releases in the last 90 days. We re-verify nightly.

How do I install Uisandbox?

Run `npx -y uisandbox-mcp`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Uisandbox run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Uisandbox

Alternatives to Uisandbox

Maintained design servers if Uisandbox isn't the fit.

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