Marmo UI is listed as active in the registry but did not answer our last check. It exposes 14 tools.
Live React design-system APIs, patterns, and code validation so AI agents build real UI, not slop.
The linked repository no longer exists on GitHub — it was deleted or made private.
Uptime history
91 days of history · worst day 0%
91 days agonow
0.0%
Uptime 24h
0 of 92 checks
14
Tools
read from the server
207 ms
Response time
average over 24h
open, no key
Access
streamable-http
What the code does
We have not read this server's code yet, 29 d ago · tools taken from the live server · rules ccca72095570
Capabilities
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
Builds a database query by concatenation
apps/design-system-docs/content/components/dialog.mdx:599, apps/design-system-docs/content/components/input-group.mdx:32, apps/design-system-docs/content/components/select-checkbox-searchable.mdx:27 и ещё 2
dialogTitle: `Delete ${selectedContacts.length} contacts?`,
Builds a file path from a variable
apps/design-system-docs/src/lib/content.ts:31
const fullPath = path.join(CONTENT_DIR, dir);
Touches key and credential files
apps/design-system-docs/Dockerfile:10
COPY pnpm-workspace.yaml pnpm-lock.yaml package.json .npmrc ./
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.
run in your terminal
claude mcp add marmo-ui --transport http https://mcp.marmoui.com/mcpSettings → Connectors → Add custom connector, then paste this address
https://mcp.marmoui.com/mcp~/.codex/config.toml
[mcp_servers.marmo-ui]
url = "https://mcp.marmoui.com/mcp".cursor/mcp.json
{
"mcpServers": {
"marmo-ui": {
"url": "https://mcp.marmoui.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"marmo-ui": {
"type": "http",
"url": "https://mcp.marmoui.com/mcp"
}
}
}Available tools 14
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
components
list_components
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.).
search_components
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.
design
get_design_guidelines
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_md
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.
agent
get_agent_connect_config
Returns ready-to-paste MCP configuration for Cursor, Claude Code, or Codex. Use on the Connect page or when setting up a new project.
component
get_component_info
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.
deploy
deploy_prototype
Register a prototype for sharing and get a share URL. Reviewers can leave inline comments via the Marmo overlay.
generate
generate_component
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.
knowledge
get_knowledge_version
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.
pattern
get_pattern
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.
prototype
get_prototype_feedback
Fetch inline comments from a shared prototype as structured data and Markdown. Pull into Cursor/Claude to iterate on feedback.
review
review_generated_code
⚠️ 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.
tenant
get_tenant_theme
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.
validate
validate_component_usage
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.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://mcp.marmoui.com/mcp | streamable-http | answering | 207 ms | 3 min ago |
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Marmo UI — questions
Answers built from our own checks of this server.
What can Marmo UI do?
It exposes 14 tools, read directly from the server on our last check. Among them: deploy_prototype, generate_component, get_agent_connect_config, get_component_info, get_design_guidelines, get_design_md and 8 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is Marmo UI mostly used for?
Its tools cluster around design and components. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Marmo UI working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 92 checks got a reply (0.0%), average response time 207 ms. The bar chart above shows every period we have measured.
Is Marmo UI still maintained?
The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.
The registry lists Marmo UI as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Marmo UI?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Marmo UI need an API key?
No. Marmo UI completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.