Install Polarion in Claude Desktop

What you need first

• Claude Desktop, installed.
• uv, which gives the uvx command the server starts with.
• Your own values for YOUR_POLARION_URL,YOUR_POLARION_TOKEN.

Steps

1. In Claude Desktop, open Settings › Developer and choose Edit Config. It opens claude_desktop_config.json.
2. Add this block. If the file already has mcpServers, add only the entry inside it.

{
  "mcpServers": {
    "mcp-server-polarion": {
      "command": "uvx",
      "args": ["mcp-server-polarion==2.1.0"],
      "env": { "POLARION_URL": "YOUR_POLARION_URL", "POLARION_TOKEN": "YOUR_POLARION_TOKEN" }
    }
  }
}

3. Replace YOUR_POLARION_URL,YOUR_POLARION_TOKEN with your own values.
4. Save the file, quit Claude Desktop completely and open it again.

Check it worked

Ask Claude Desktop: List the tools of mcp-server-polarion.

If it does not start

spawn uvx ENOENT

uv is not on the PATH that Claude Desktop sees. Install it, or write the full path of uvx in the config.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.

Nothing changes after a restart

The file is not valid JSON any more. Look for a missing comma where the block was added.