Add an MCP Server to Claude Desktop
To register a MCP Server in Claude Desktop, click on Settings, click the Developer, and click Edit Config

Enter your MCP Server in the claude_desktop_config.json configuration file. The following example shows an MCP Server packaged as a FAT jar which uses STDIO transport.
{
"mcpServers": {
"diskspace": {
"command": "java",
"args": ["-jar", "/Users/sdelamo/bin/diskspace-0.1-all.jar"]
}
}
}