onsystem
Keeps coding agents on your design system: knows your real components, props, variants and tokens.
MCP server · by dgesteves
About
onsystem is an MCP server published by dgesteves. Marketplaces we read that list it: 2 (Official MCP Registry, Community GitHub marketplaces). The last change we recorded was on 2026-10-12. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
- Hooks: 1
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Package
npm onsystem (onsystem on npm)
- npm downloads/week: 662 (2026-10-13)
- npm downloads/month: 662 (2026-10-13)
- Latest version on npm: 0.6.0, published 2026-10-12
No known vulnerabilities in OSV for 0.6.0 (checked 2026-10-13)
npm facts come from the public npm registry (registry.npmjs.org, api.npmjs.org). Each figure is the registry's own and is never added to another. A registry that publishes no figure shows none: no number is not zero. Vulnerability records come from OSV.dev (CC BY 4.0) and concern the declared version only; a listing that declares no version gets no answer. We do not scan code.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: npm package
Built from what Official MCP Registry declares.
claude mcp add --transport stdio onsystem -- npx -y onsystem[mcp_servers.onsystem]
command = "npx"
args = ["-y", "onsystem"]{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}As a Claude Code plugin
Built from what Community GitHub marketplaces declares.
/plugin marketplace add dgesteves/design-system-mcp
/plugin install onsystem@dgestevesWhere it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 0.6.0 | Downloads/month (npm): 662 Downloads/week (npm): 662 Forks (GitHub): 1 Stars (GitHub): 1 |
Not marked |
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.
Also listed in one community marketplace
| Marketplace | Repository | Stars (GitHub) |
|---|---|---|
| dgesteves | dgesteves/design-system-mcp | 1 |
What the bundle contains
As published on Community GitHub marketplaces.
MCP servers: 1
onsystem
Skills: 1
onsystem
Hooks: 1
PostToolUse
What changed
- Appeared on a new marketplace: Community GitHub marketplaces
- Community GitHub marketplaces: appeared
- Official MCP Registry: released version 0.6.0 (was 0.5.0)
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Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.