Everything

What it is

The Everything MCP server attempts to exercise all the features of the MCP protocol. It is explicitly not intended to be a useful server, but a test server for builders of MCP clients. It implements prompts, tools, resources, sampling, and more to showcase MCP capabilities, and supports stdio, SSE, and streamable HTTP transports.

Who it's for

• Builders of MCP clients who need a server to test against
• Developers who want to see MCP protocol primitives demonstrated

Requirements

Setup

1. Claude Desktop (stdio)

   Add this to your claude_desktop_config.json.

   jsonCopy

   {
     "mcpServers": {
       "everything": {
         "command": "npx",
         "args": [
           "-y",
           "@modelcontextprotocol/server-everything"
         ]
       }
     }
   }

2. Claude Desktop on Windows

   On Windows, use cmd /c to launch npx.

   jsonCopy

   {
     "mcpServers": {
       "everything": {
         "command": "cmd",
         "args": [
           "/c",
           "npx",
           "-y",
           "@modelcontextprotocol/server-everything"
         ]
       }
     }
   }

3. VS Code (NPX)

   Add to your user mcp.json (via the Command Palette, MCP: Open User Configuration) or to .vscode/mcp.json in your workspace.

   jsonCopy

   {
     "servers": {
       "everything": {
         "command": "npx",
         "args": ["-y", "@modelcontextprotocol/server-everything"]
       }
     }
   }

4. Install as a global package

   Install the package globally, then run it with npx.

   bashCopy

   npm install -g @modelcontextprotocol/server-everything@latest

Examples

npx @modelcontextprotocol/server-everything

npx @modelcontextprotocol/server-everything sse

npx @modelcontextprotocol/server-everything streamableHttp

cd src/everything
npm install
npm run start:streamableHttp

Pros & cons

Images