Clojars MCP Server

A Model Context Protocol (MCP) server that provides tools for fetching dependency information from Clojars, the Clojure community's artifact repository for Cline, Roo Code, Cody, Claude Desktop etc.

Installation

Installing via npx

The quickest way to use the Clojars MCP Server is to run it directly with npx:

npx clojars-deps-server

You can also install it globally:

npm install -g clojars-deps-server

Installing via Smithery

To install Clojars Dependency Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install clojars-deps-server --client claude

Manual Installation

1. Clone this repository:

git clone https://github.com/yourusername/clojars-deps-server.git
cd clojars-deps-server

1. Install dependencies:

npm install

1. Build the server:

npm run build

1. Add the server to your Claude configuration:

For VSCode Claude extension, add to cline_mcp_settings.json (typically located at ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/ on macOS):

{
  "mcpServers": {
    "clojars-deps-server": {
      "command": "node",
      "args": ["/path/to/clojars-deps-server/build/index.js"]
    }
  }
}

For Claude desktop app, add to claude_desktop_config.json (typically located at ~/Library/Application Support/Claude/ on macOS):

{
  "mcpServers": {
    "clojars-deps-server": {
      "command": "node",
      "args": ["/path/to/clojars-deps-server/build/index.js"]
    }
  }
}

After adding the server configuration, Claude will automatically detect and connect to the server on startup. The server's capabilities will be listed in Claude's system prompt under "Connected MCP Servers", making them available for use.

Features

• Get the latest version of any Clojars dependency
• Check if a specific version of a dependency exists
• Get version history of dependencies with configurable limits
• Simple, focused responses
• Easy integration with Claude through MCP

How It Works

When this MCP server is configured in Claude's settings, it automatically becomes available in Claude's system prompt under the "Connected MCP Servers" section. This makes Claude aware of the server's capabilities and allows it to use the provided tools through the use_mcp_tool command.

The server exposes three tools:

get_clojars_latest_version

{
  "name": "get_clojars_latest_version",
  "description": "Get the latest version of a Clojars dependency (Maven artifact)",
  "inputSchema": {
    "type": "object",
    "properties": {
      "dependency": {
        "type": "string",
        "description": "Clojars dependency name in format \"group/artifact\" (e.g. \"metosin/reitit\")"
      }
    },
    "required": ["dependency"]
  }
}

check_clojars_version_exists

{
  "name": "check_clojars_version_exists",
  "description": "Check if a specific version of a Clojars dependency exists",
  "inputSchema": {
    "type": "object",
    "properties": {
      "dependency": {
        "type": "string",
        "description": "Clojars dependency name in format \"group/artifact\" (e.g. \"metosin/reitit\")"
      },
      "version": {
        "type": "string",
        "description": "Version to check (e.g. \"0.7.2\")"
      }
    },
    "required": ["dependency", "version"]
  }
}

get_clojars_history

{
  "name": "get_clojars_history",
  "description": "Get version history of a Clojars dependency",
  "inputSchema": {
    "type": "object",
    "properties": {
      "dependency": {
        "type": "string",
        "description": "Clojars dependency name in format \"group/artifact\" (e.g. \"metosin/reitit\")"
      },
      "limit": {
        "type": "number",
        "description": "Number of versions to return (default: 15, max: 100)",
        "minimum": 1,
        "maximum": 100
      }
    },
    "required": ["dependency"]
  }
}

The tool names and descriptions are specifically designed to help Claude understand that these tools are for retrieving version information from Clojars. When users ask about Clojars dependencies, Claude can recognize that these tools are appropriate for the task based on:

• The tool names explicitly indicate their purpose
• The descriptions specify they're for "Clojars dependency (Maven artifact)"
• The example formats show typical Clojars dependency patterns