Koskamo

onsystem MCP

An MCP server that enables coding agents to adhere to a project's design system by listing components, querying props and variants, and checking UI code for hardcoded colors, native elements, and invalid APIs, providing fixes for agent-written React.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

onsystem MCP logo, by dgestevesCommunity listingLocal stdioSource reviewed; not executedPublished by dgesteves
Vendor documentation

Checks and signals

Each line is separate evidence, not a trust score.

  • Popularity 165 GitHub stars

What you can do with it

  • List every component in the project design system with descriptions and variants
  • Get the full contract of one component including props, types, and classes
  • Check UI code for design system violations like hardcoded colors and native elements
  • Fix design system problems in agent-written React code

Source and maintenance

Community listingRegistry 0.12.1MIT
mcp-registry: io.github.dgesteves/onsystem@0.12.1Source repositoryProject website
Last repository push
Latest release
v0.12.1
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

onsystem 0.12.1

npm
onsystem package definition
{
  "version": "0.12.1",
  "transport": "stdio",
  "identifier": "onsystem",
  "registryType": "npm"
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · repository · passed · metadata changed · updated
  • · backfill · recorded · Pre-expansion baseline; unobserved rich metadata remains unknown

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "onsystem-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "onsystem@0.12.1"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "onsystem-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "onsystem@0.12.1"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "onsystem-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "onsystem@0.12.1"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "onsystem-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "onsystem@0.12.1"
      ]
    }
  }
}

Let your agent find its tools

Find servers like onsystem MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows
See all 7,692