MCP test and reference server — implements all MCP capabilities for testing and development
npx @getmcp/cli add everythingConfig file: ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"everything": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-everything"
]
}
}
}