Atlas / MCP servers / zygiu-zygis / basecoat-ui-mcp

basecoat-ui-mcpCAUTION

mcp/zygiu-zygis/basecoat-ui-mcp

Offline MCP server for Basecoat UI (shadcn/ui look, no React): templates, macro layouts, theming/dark-mode contract, static validation.

Verdict
CAUTION
Grade
B
Trust score
89 /100
Exposed tools
22 21r · 1w · 0d
Transport
stdio
License
MIT
Stars
46
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

Basecoat UI MCP

Offline Model Context Protocol server for Basecoat UI (shadcn/ui look without bundling or requiring React). Curated templates, macro layouts, rhythm tokens, and static validation for Astro, Next.js, HTML, and Tailwind CSS 4.

The server exposes a deterministic, offline registry for AI coding agents instead of requiring clients to scrape documentation. It runs over local stdio with zero runtime network requests, bounded < 2 KB responses, and bounded lexical/heuristic static source validation. The host application remains responsible for rendering, data access, authentication, sessions, credentials, OAuth, captcha, and other runtime behavior.

Install

Requires Node.js 22.14.0 or newer.

Quick Start by Client

Cursor (.cursor/mcp.json)

{
"mcpServers": {
"basecoat-ui": {
"command": "npx",
"args": ["-y", "@intellme
Read from source at commit 532269217261OBSERVED · 2026-10-14
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code (npm)
claude mcp add basecoat-ui-mcp -- npx -y @intellmedia/[email protected]
03

Exposed tools (22)

21 read · 1 write · 0 destructive.

ToolRiskDescription
apply_design_patchwrite
basecoat_component_syntaxread
basecoat_compose_stackread
basecoat_creative_directorread
basecoat_get_chart_blueprintread
basecoat_list_chartsread
basecoat_page_architectread
basecoat_quality_inspectorread
basecoat_rules_enforcerread
basecoat_setup_configread
begin_designread
get_component_detailsread
get_component_htmlread
get_design_contextread
get_fsm_reciperead
get_macro_blockread
get_rhythm_rulesread
search_componentsread
search_macro_blocksread
validate_compositionread
validate_designread
validate_markupread
04

Trust audit

CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codePASS
L2Instruction surface (what it tells the agent)WARN
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
declared (4 observation(s))
Network
declared (4 observation(s))
Shell
declared (1 observation(s))
Dependencies
not all pinned
Secrets in source
none-found

Findings (9)

MEDIUMPrompt injection · prompt.hidden_style · CWE-94, CWE-1427
skills/basecoat/components/collapsible.md:47
<div style="display:none">Content</div>
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
src/semantics/index.ts:14
const sourceDirectory = join(__dirname, '../../src/semantics');
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
src/server/index.ts:367
let skillsDir = fileURLToPath(new URL('../../skills', import.meta.url));
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
src/server/version.ts:5
const packagePath = join(dirname(fileURLToPath(import.meta.url)), '../../package.json');
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
tests/fixtures/store-race.mjs:2
import { openFilesystemDesignStore } from '../../dist/macros/store.js';
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
package.json
@types/node, tsx
Why it matters. 2 dependency range(s) float
Fix. pin exact versions or ship a lockfile
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
docs/mcp-blocks-expansion.md:17
| **Auth** | `auth-sign-in` | `page` | `auth` | main: 1, h1: 1 | Card login with OAuth (GitHub, Google), email/password, forgot password link, FSM bindings. Ref: https://ui.shadcn.com/blocks/login |
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
docs/mcp-blocks-expansion.md:18
| **Auth** | `auth-sign-up` | `page` | `auth` | main: 1, h1: 1 | Card signup with name/email/password, terms checkbox, OAuth buttons, login redirect. Ref: https://ui.shadcn.com/blocks/signup |
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
README.md:21
The server exposes a deterministic, offline registry for AI coding agents instead of requiring clients to scrape documentation. It runs over local stdio with **zero runtime network requests**, bounded
Why it matters. asks the agent to read credentials

Gates applied: no_behavioural_pass.

Audited 2026-10-14 · audit v0.4.1 · source sha 532269217261full audit observations/trust-audit/mcp-server/zygiu-zygis__basecoat-ui-mcp.json · Report an issue / request a re-scan
05

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-14532269217261CAUTIONB89first audit
06

Questions

What is the basecoat-ui-mcp MCP server?

Offline MCP server for Basecoat UI (shadcn/ui look, no React): templates, macro layouts, theming/dark-mode contract, static validation.

What tools does basecoat-ui-mcp expose?

22 in total: 21 read-only, 1 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is basecoat-ui-mcp safe to connect to an agent?

With care. The audit graded it B (89/100) and found 9 things worth knowing before you trust this server, listed below with the exact line each was found on.

What credentials does basecoat-ui-mcp need?

No credential environment variables were found in its source, so it appears to need none.

How does basecoat-ui-mcp run?

It speaks stdio, so it runs as a local process your client starts. It is published on npm as @intellmedia/basecoat-ui-mcp at 1.7.1.

How current is this page?

The grade is for one exact copy of the source (532269217261), read on 2026-10-14. The repository is watched and re-audited when it changes.

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