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MCP Everything

@s2005

リポジトリ

基本情報

カテゴリ

その他

ライセンス

MIT license

トランスポート

stdio

作者

s2005

MCP Everything について

MCP server that exercises all the features of the MCP protocol

#mcp#mcp-server#protocol-testing

MCP Everything の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "mcp-everything": {
      "command": "docker",
      "args": [
        "build",
        "-t",
        "mcp-everything",
        "."
      ]
    }
  }
}

MCP Everything のツール

12

`message` (string): Message to echo back

Text content with echoed message

`a` (number): First number

Text result of the addition

`duration` (number, default: 10): Duration in seconds

Completion message with duration and steps

`prompt` (string): The prompt to send to the LLM

Generated LLM response

Base64 encoded PNG image data

JSON string of all environment variables

`messageType` (enum: "error" | "success" | "debug"): Type of message to demonstrate different annotation patterns

Content with varying annotations

概要

What is MCP Everything?

MCP Everything is a test server designed to exercise all features of the Model Context Protocol (MCP), including prompts, tools, resources, sampling, and logging. It is intended for builders of MCP clients, not for production use.

How to use MCP Everything?

Install globally via npm (npm install -g mcp-everything), clone and build locally, or run via Docker. Add it to your MCP client configuration (e.g., claude_desktop_config.json) using the command npx -y mcp-everything.

Key features of MCP Everything

  • Tools – 7 tools: echo, add, longRunningOperation, sampleLLM, getTinyImage, printEnv, annotatedMessage.
  • Resources – 100 test resources with pagination, subscriptions (auto-update every 5 seconds), and templates.
  • Prompts – Two prompts: simple_prompt (no arguments) and complex_prompt (required temperature, optional style).
  • Logging – Sends random-level log messages every 15 seconds.
  • LLM Sampling – Demonstrates MCP sampling via the sampleLLM tool.

Use cases of MCP Everything

  • Testing and validating MCP client implementations with a feature-rich server.
  • Demonstrating progress notifications, resource subscriptions, and annotation patterns.
  • Experimenting with LLM sampling through the built-in sampleLLM tool.
  • Debugging MCP server configuration with the printEnv tool.
  • Exploring text and binary resource formats with a large set of test resources.

よくある質問

1

What is the purpose of this server?

It is an MCP test server that exercises all protocol features (prompts, tools, resources, sampling, logging) to help MCP client builders verify their implementations.

2

How do I install MCP Everything?

You can install globally via `npm install -g mcp-everything`, clone the repository and run `npm install && npm build && npm start`, or use Docker with `docker build -t mcp-everything && docker run -it mcp-everything`.

3

How does MCP Everything demonstrate progress notifications?

The `longRunningOperation` tool accepts a duration and number of steps, then sends progress notifications to the client during execution.

4

Does MCP Everything support resource subscriptions?

Yes. Subscribed resources receive automatic updates every 5 seconds, demonstrating real-time resource change notifications.

5

What logging features does MCP Everything include?

The server sends log messages at random levels every 15 seconds to showcase MCP’s logging capability.

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