ui-kit vs Arc UI
ui-kit is a plugin bundle for AI coding tools published by annondeveloper. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). Arc UI is an MCP server published by uiarc.dev. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-13. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  ui-kit |  Arc UI |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 2 Stars (GitHub): 0 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.0 Forks (GitHub): 37 Stars (GitHub): 724 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | ui-kit | Arc UI |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 0 (worse) | 724 (better) |
| Forks (GitHub) (differs) | 2 (worse) | 37 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | Remote server (ui-kit-mcp.annondeveloper.workers.dev/sse) | Remote server (uiarc.dev/api/mcp) |
| Transport (differs) | SSE | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | 1 | Not published |
| Parts of the bundle (differs) | 9 | Not a bundle |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/annondeveloper/ui-kit | github.com/kuratlielia/arc-library |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-12 | 2026-10-11 |
| Endpoint at the last check | not checked yet | not checked yet |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
ui-kit
147 zero-dependency React components with Aurora Fluid design. 5 skills for component discovery, code generation, design system reference, tier selection, and accessibility auditing. 2 agents for architecture and a11y review. Auto-connects to hosted MCP server.
Arc UI
React components and blocks with motion. Search docs, props and shadcn install commands.
How to run each
ui-kit As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install ui-kit@claude-communityArc UI As a remote MCP server
claude mcp add --transport http arc https://uiarc.dev/api/mcp --header "Authorization: Bearer <YOUR_TOKEN>"Requires: Authorization header
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: ui-kit · What it can do: Arc UI · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.