AI Plugin Index
onsystem
CommunityMCP server by dgesteves · updated · ★ 1 · 831 downloads a week
Catches palette colors, native elements and APIs your design system lacks in agent-written React. onsystem is a community project by dgesteves, not verified by a company domain.
Last commit 4 days ago
MIT: permissive, fine for commercial use
Clear description, published package or server URL, original repository
Not checked yet. What we check
Install onsystem
Built from the published package, never by AIclaude mcp add onsystem -- npx -y onsystemRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add onsystem -- npx -y onsystem{
"mcpServers": {
"onsystem": {
"command": "npx",
"args": [
"-y",
"onsystem"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add onsystem npx -y onsystemGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the onsystem block.
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onsystem: common questions
How do I install onsystem?
In Claude Code run claude mcp add onsystem -- npx -y onsystem. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is onsystem the official server?
onsystem is a community project by dgesteves, not verified by a company domain.
Is onsystem free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is onsystem safe to use?
It scores 81 of 100. Grades: maintenance A, licence A, quality C. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to onsystem?
Similar MCP servers: GitDiagram, draw.io, Pascal App CLI, Figma-Context-MCP.
Does onsystem work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.