Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add paulieb89/property-shared --skill create-mcp-appgit clone --depth 1 https://github.com/paulieb89/property-sharedWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/paulieb89/property-shared/create-mcp-app)<a href="https://agentmods.dev/skills/paulieb89/property-shared/create-mcp-app"><img src="https://agentmods.dev/badge/skills/paulieb89/property-shared/create-mcp-app.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00077 | $0.02862 |
| Opus 5 | $0.00039 | $0.01431 |
| Sonnet 5 | $0.00015 | $0.00572 |
| Haiku 4.5 | $0.00008 | $0.00286 |
Grade A, and why
Create-MCP-App scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
92% identical to create-mcp-app — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 342 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create MCP App
Build interactive UIs that run inside MCP-enabled hosts like Claude Desktop. An MCP App combines an MCP tool with an HTML resource to display rich, interactive content.
Core Concept: Tool + Resource
Every MCP App requires two parts linked together:
- Tool - Called by the LLM/host, returns data
- Resource - Serves the bundled HTML UI that displays the data
- Link - The tool's
_meta.ui.resourceUrireferences the resource
Host calls tool → Server returns result → Host renders resource UI → UI receives result
Quick Start Decision Tree
Framework Selection
| Framework | SDK Support | Best For |
|---|---|---|
| React | useApp hook provided |
Teams familiar with React |
| Vanilla JS | Manual lifecycle | Simple apps, no build complexity |
| Vue/Svelte/Preact/Solid | Manual lifecycle | Framework preference |
Project Context
Adding to existing MCP server:
- Import
registerAppTool,registerAppResourcefrom SDK - Add tool registration with
_meta.ui.resourceUri - Add resource registration serving bundled HTML
Creating new MCP server:
- Set up server with transport (stdio or HTTP)
- Register tools and resources
- Configure build system with
vite-plugin-singlefile
Getting Reference Code
Clone the SDK repository for working examples and API documentation:
git clone --branch "v$(npm view @modelcontextprotocol/ext-apps version)" --depth 1 https://github.com/modelcontextprotocol/ext-apps.git /tmp/mcp-ext-apps
Framework Templates
Learn and adapt from /tmp/mcp-ext-apps/examples/basic-server-{framework}/:
| Template | Key Files |
|---|---|
basic-server-vanillajs/ |
server.ts, src/mcp-app.ts, mcp-app.html |
basic-server-react/ |
server.ts, src/mcp-app.tsx (uses useApp hook) |
basic-server-vue/ |
server.ts, src/App.vue |
basic-server-svelte/ |
server.ts, src/App.svelte |
basic-server-preact/ |
server.ts, src/mcp-app.tsx |
basic-server-solid/ |
server.ts, src/mcp-app.tsx |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 342 lines · 77 tokens per session scan A ef7b8367758b
Create-MCP-App is a skill published in the GitHub repository paulieb89/property-shared (16 stars, last pushed 3d ago), licensed MIT. It adds 77 tokens to every session and 2,862 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to create-mcp-app, differing in 7 lines, and is treated as a copy.
Other skills, from other repositories
web-design-director
Skill "web-design-director" from guia-matthieu/clawfu-skills, covering web design director, when to use this skill, methodology foundation, what claude does vs what you decide and what this skill does.
website-finishing-director
Run a structured 5-pass finishing audit on any website before launch — scoring visual polish, technical foundation, UX completeness, content quality, and cross-device readiness on 100 points. Use when: Pre-launch - Final validation before going live; Post-redesign - Verify nothing broke during the overhaul; Client…
react-component-pro
Build reusable, accessible, performant React components with hooks, composition patterns, and modern best practices. Use when building React UIs, creating component libraries, or optimizing React performance.
a11y-debugging
Uses Chrome DevTools MCP for accessibility (a11y) debugging and auditing based on web.dev guidelines. Use when testing semantic HTML, ARIA labels, focus states, keyboard navigation, tap targets, and color contrast.
debug-optimize-lcp
Guides debugging and optimizing Largest Contentful Paint (LCP) using Chrome DevTools MCP tools. Use this skill whenever the user asks about LCP performance, slow page loads, Core Web Vitals optimization, or wants to understand why their page's main content takes too long to appear. Also use when the user mentions…
figma-implement-design
Translate Figma nodes into production-ready code with 1:1 visual fidelity using the Figma MCP workflow (design context, screenshots, assets, and project-convention translation). Trigger when the user provides Figma URLs or node IDs, or asks to implement designs or components that must match Figma specs. Requires a…