mcpgen vs everything

Side-by-side comparison to help you pick between these two MCP servers.

	mcpgen by lyeslabs	everything by modelcontextprotocol
Stars	★ 90	★ 85,748
30d uses	—	—
Score	44	77
Official	—	✓
Categories	Developer ToolsAI / LLM ToolsOther	Developer ToolsAI / LLM ToolsOther
Language	Go	TypeScript
Last commit	12 mo ago	this month

mcpgen · Summary

mcpgen is a Go tool that generates MCP server boilerplate from OpenAPI 3 specifications.

everything · Summary

Official MCP test server exercising all protocol features for client builders.

mcpgen · Use cases

Transform existing REST APIs into AI-accessible tools without manual MCP implementation
Accelerate MCP server development for teams with existing OpenAPI documentation
Generate boilerplate code for MCP servers handling complex request/response schemas

everything · Use cases

Testing MCP client implementations against all protocol features
Learning MCP protocol capabilities through a reference server
Validating client compatibility with different transport methods

mcpgen · Install

Install mcpgen:

go install github.com/lyeslabs/mcpgen/cmd/mcpgen@latest

Once installed, generate an MCP server from your OpenAPI spec:

mcpgen --input openapi.yaml --output generated-server

In Claude Desktop, configure the generated server by adding to claude_desktop_config.json:

{
  "mcpServers": {
    "my-api-server": {
      "command": "go",
      "args": ["run", "/path/to/generated-server/main.go"]
    }
  }
}

everything · Install

NPX (recommended)

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

On Windows, use cmd /c:

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

Docker

{
  "mcpServers": {
    "everything": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "mcp/everything"]
    }
  }
}

Global install

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

Comparison generated from public README + GitHub signals. Last updated automatically.