Is Uisandbox safe and trustworthy?

tashan scores Uisandbox on public evidence — tashan score 63.0/100, it is currently active, note: a single primary maintainer (bus-factor risk), no known advisories against the current release, its declared dependencies reach: browser. Audit scope: OSV advisories, install-time scripts, build provenance and declared permission surface. We do not review source code or execute the capability.

How do I install Uisandbox?

In Claude Code: run `claude mcp add uisandbox -- npx -y uisandbox-mcp`. In Cursor / Claude Desktop, add it to mcp.json / claude_desktop_config.json.

Who maintains Uisandbox?

source: AlexanderKaan/uisandbox.

‹ The Index

Uisandbox

npm

Test your design on the real thing: load a built web app, turn its knobs, verify 1:1, export.

Works with: Claude Code, Cursor, Claude Desktop, Codex CLI, Gemini CLI, Cline, Windsurf, VS Code (installable)
installable: each client documents how to load an MCP server of this type — that is the client's promise, not a claim verified against this capability

Install (Claude Code):

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

tashan score: 63.0
Adoption: 563/wk
Upkeep: 61.0
Freshness: 100.0
Evidence coverage: 100% of the inputs this score can use
Health: active
License: MIT

Security audit

Every finding is shown in full — which advisory, the version that fixes it, and the exact command run at install time. Nothing in this audit is behind a licence.

No known advisoriesclearchecked against OSV for 0.3.1 — this package, not its dependency tree

Drives a browserfrom declared dependencies

Can carry remote content into your agentit can pull third-party text into the model's context — treat what it returns as untrusted input

No build provenanceno attestation — the published artifact cannot be traced to its source

You searched for one. Check the rest of your stack:

npx tashan-cli doctor

Reads the config already on your machine and names what is dead, deprecated or running code at install time. No account, nothing uploaded.

tashan Pro$6/mo

Uisandbox scores 63 today. Pro keeps the series, so you can see whether that is a project getting better or one on its way down.

Every score since we started measuring, for any capability
The named replacement when something you run is dying — not just that it is
tashan doctor over the config you already have, on your machine

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Measured this well? Put the live badge in your README — it updates as the score does.

[![tashan](https://tashan.sh/badge/pkg-uisandbox-mcp.svg)](https://tashan.sh/capability/pkg-uisandbox-mcp.html)

npm ↗ · source ↗ · pkg:uisandbox-mcp

Everything on this page is public evidence and free. What it cannot know is whether you run this — check your whole config, free, in the browser. tashan Pro adds the series behind each row and names a replacement for anything dying.

Already running this? Check your whole config — free, in your browser, nothing installed. Or npx tashan-cli doctor locally, which sends nothing at all.

Measured 2026-08-21 · scorer s5 · how · something wrong here?