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Marmo UI MCP server

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by mahmoudilyan·io.github.mahmoudilyan/marmo-ui·v1.1.1·39 stars
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Live React design-system APIs, patterns, and code validation so AI agents build real UI, not slop.

F17/100grade F
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Safety scan
F17/100

full report

Adoption
Growing

39 stars

Blocked at the gateway.Blocked at the gateway. A critical finding or a dead endpoint.

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Marmo UI tools (14, 1 write)

write = sends, deletes, buys or posts
  • deploy_prototypewrite actionFree

    Register a prototype for sharing and get a share URL. Reviewers can leave inline comments via the Marmo overlay.

  • generate_componentFree

    Validate and optionally save a custom component for the authenticated tenant. Runs review_generated_code validation before persisting. Use for AI-generated or customized components.

  • get_agent_connect_configFree

    Returns ready-to-paste MCP configuration for Cursor, Claude Code, or Codex. Use on the Connect page or when setting up a new project.

  • get_component_infoFree

    Get exact props (with types and defaults), code examples, composition patterns, and common mistakes for a single @marmoui/ui component. REQUIRED before using any component for the first time in a session — prevents hallucinated props (e.g. variant="danger" on Badge, size="lg" on Text) that fail at build time.

  • get_design_guidelinesFree

    MANDATORY FIRST CALL before writing any @marmoui/ui code in this session. Returns a step-by-step generation checklist (which tools to call, in what order), critical rules (no namespace sub-components, PageSection is self-closing, no Sidebar export), component patterns, and ICON LIBRARY RULES. Pass iconLibrary (default "phosphor"; also "material" | "lucide" | "tabler" | "heroicons" | "feather") to get that library's import source, icon name map, and weight/style mapping — and pass the SAME value to review_generated_code so it enforces it. Ask the user which icon library they want before writing UI code. Call topic="patterns" to get the generation checklist specifically.

  • get_design_mdFree

    Generate a portable DESIGN.md for the authenticated tenant — brand color, type, tokens, and component inventory — that any AI agent can read to generate on-brand UI. Pass format="markdown" (default) for the DESIGN.md string or format="json" for structured data. Output is deterministic for a given tenant.

  • get_knowledge_versionFree

    Returns the MCP knowledge version: gitSha, indexedAt, componentCount, patternCount, uptimeSeconds. Call this ONCE per session before generating UI code so you know how fresh the design-system data is. Cheap to call. If gitSha is "unknown" or indexedAt is far in the past, surface that to the user before relying on the data.

  • get_patternFree

    Get a complete, validated composition example for a common UI pattern. Available: app-layouts (ASK USER which of 4 layout ids before any full page), app-shell, confirmation-dialog, dialogs-for-other-actions, data-table-with-filters, form-with-validation, posthog-tracking. Call app-layouts first for full pages — returns layout selection flow + AppLayout usage. Pass iconLibrary (default "phosphor") so the usage note tells you which icon import source to rewrite the pattern's icons to. Returns code + inline validation report. Call with no arguments to list all patterns.

  • get_prototype_feedbackFree

    Fetch inline comments from a shared prototype as structured data and Markdown. Pull into Cursor/Claude to iterate on feedback.

  • get_tenant_themeFree

    Returns the authenticated tenant's customized theme tokens, CSS variables export, and component overrides. Call after auth to apply tenant-specific styling in generated code.

  • list_componentsFree

    List all available @marmoui/ui components with names, descriptions, categories, and prop counts. Use to discover what exists. Prefer `search_components` when you already know the use case (form, table, dialog, etc.).

  • review_generated_codeFree

    ⚠️ MANDATORY — call this on every piece of code you generate before returning it to the user. Validates TSX/JSX against real @marmoui/ui prop signatures and returns { valid, errors[], warnings[], suggestedFixes[], iconLibrary }. Catches: (1) unknown imports, (2) Tabs.List/Tabs.Trigger namespace misuse → auto-suggests TabsList/TabsTrigger fix, (3) PageSection used as wrapper (must be self-closing), (4) hallucinated props, (5) icons imported from the wrong icon library (pass iconLibrary — default "phosphor" — matching what you passed to get_design_guidelines; wrong-library icon imports are ERRORS). If valid=false, fix all errors and call this again. DO NOT return code with errors to the user.

  • search_componentsFree

    Search @marmoui/ui by keyword (e.g. "form", "table", "dialog", "avatar"). Preferred discovery tool — returns the 5-8 most relevant components for a need. Call this before `get_component_info` when unsure which component to use.

  • validate_component_usageFree

    Validate a TSX/JSX snippet against real @marmoui/ui prop signatures. Returns `{valid, issues[]}`. Prefer `review_generated_code` for post-generation review (it also auto-fixes namespace patterns and suggests related patterns). Use this tool when validating user-provided or existing code rather than newly generated code.

Public scan report

scanner v0.1.10 · 2026-10-12 · same rubric, same numbers if you re-run it

1 high
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote unreachable: HTTP 5000/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualityno auth information5/15
  • Maintenancerepository not readable: repo not found3/15
  • Maintainer identityno repository or website to verify2/10

Findings (1)

  • highRemote endpoint did not respondreliability.unreachable

    HTTP 500

Overall 17/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Marmo UI compares

Against every graded Media MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
17/100
higher than 0% of 1,331 Media servers
Tools
14
the typical Media server has 7
Tools that change things
7%
typical: 6%. Fewer write tools means less an agent can break
Uptime
0%
of our recent checks; the typical remote Media server answers 100%
Response time
112 ms
faster than 85% of 860 Media servers
GitHub stars
39
more than 92% of 727 Media servers

What its tools let an agent do: 12 read · 1 create · 1 run or deploy

Install Marmo UI in Claude Code, Cursor or VS Code

claude mcp add --transport http marmo-ui https://mcp.marmoui.com/mcp
Add to Cursor

What the publisher says

From the Marmo UI repository's README, as published. We do not edit it. Read it on GitHub

Marmo UI

The AI agentic designer. Point the agent you already use — Claude Code, Codex, Cursor, Gemini CLI — at Marmo and it builds production dashboards and apps in minutes: real components, real props, your own style. No AI slop.

Platform, docs & pricing → marmoui.com

npx marmoui init     # connect your agent (free, no account)
npm i @marmoui/ui    # the component library (MIT)

Then just ask your agent: "Build a billing dashboard with Marmo UI."

<!-- TODO: demo video goes here -->

How it works

  • @marmoui/ui — an open-source React 19 design system (MIT, public npm). Tables, charts, forms, app shells — everything a product UI needs, light + dark from one token set.
  • The Marmo MCP — a hosted knowledge server your agent connects to. Instead of guessing from training data, the agent reads live component APIs, composition patterns, and generation rules, and validates its output (reviewgeneratedcode) before reporting done. Wrong imports and invented props get caught and fixed before you ever see them.
  • Claude Code plugin — /plugin marketplace add mahmoudilyan/marmoui → /plugin install marmo-ui@marmoui-plugins. Bundles the MCP plus the marmo-ui skill and /marmo-ui:* commands (init, design-md, build) that enforce the find → generate → validate workflow.

Light and dark from one token set

Every component ships both themes off the same semantic tokens (bg, panel, ink, primary-*) — no parallel dark stylesheet, no hardcoded hex.

Free vs Pro

Pro mode in one sentence: the free tier makes your agent correct; Pro makes it yours — run /marmo-ui:init (or write a DESIGN.md by hand), upload it at marmoui.com/connect, and every agent on your account generates UI in your brand instead of the Marmo defaults. Generation always happens in your agent with your LLM tokens; the code lands in your repo and you own it fully.

Monorepo structure

├── apps/
│   └── design-system-docs/    # marmoui.com — docs + marketing site
├── packages/
│   ├── ui/                    # @marmoui/ui — publishable component library
│   └── cli/                   # marmoui — npx marmoui init
└── tools/claude-plugin/       # Claude Code plugin + marketplace

The hosted MCP server and platform services live in a private repository; this repo talks to them only through the hosted MCP at mcp.marmoui.com.

Using @marmoui/ui directly

Works as a regular component library too — no agent required:

import '@marmoui/ui/style.css'; // once, in your app entry
import { Button, DataTable } from '@marmoui/ui';

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-10-12revokeB → Fscore 17: Remote endpoint did not respond

Marmo UI: common questions

Is Marmo UI MCP server safe?
No: it is graded F and blocked at the gateway (17/100). Read the Marmo UI safety report
How do I install Marmo UI?
It runs remotely at mcp.marmoui.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Marmo UI need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Marmo UI maintained?
The last commit was 113 days ago (2026-07-25). The latest release is v1.1.1.
Is Marmo UI up?
0% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Marmo UI?
Servers from other publishers that do the same job: Dembrandt MCP server, TypeUI MCP server and melta UI MCP server.
How does Marmo UI compare with other Media MCP servers?
safety score 17/100 (higher than 0% of 1,331 Media servers); tools 14 (the typical Media server has 7); tools that change things 7% (typical: 6%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Marmo UI

Same job from other publishers: the closest match first, then the best rated.

  • Dembrandt
    Design tokens from any live site: colours, type, spacing, components, drift against a baseline.
    B
  • TypeUI
    Design systems, UI prompts, and layout variations for AI coding tools.
    A
  • melta UI
    AI-Ready design system MCP: melta UI tokens, component contracts, 107 rules, check_html self-verify
    A
  • AINDF
    Read-only MCP server for one AINDF design-system bundle: look up what it offers, validate screens.
    A
  • Raven
    Design intelligence for coding agents: audits, design systems, and a taste profile agents consult.
    B