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Stun MCP Server

@kadoshita

Repository

Basic information

Category

Other

License

MIT license

Transports

stdio

Author

kadoshita

About Stun MCP Server

STUN(RFC8489)のBinding Requestを送って結果を返すMCPサーバー

#mcp#stun#mcp-server

Stun MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "stun": {
      "command": "node",
      "args": [
        "/path/to/stun-mcp/build/main.js"
      ]
    }
  }
}

Stun MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is stun-mcp?

stun-mcp is an MCP server that sends a STUN (RFC8489) Binding Request to a specified STUN server and returns the result. It is intended for developers or AI agents who need to test or verify STUN connectivity, for example to determine a public IP and port.

How to use stun-mcp?

Install Node.js and build the server. Add the following configuration to your mcp.json file (e.g., in VS Code with Agent mode enabled): { "servers": { "stun": { "type": "stdio", "command": "node", "args": ["/path/to/stun-mcp/build/main.js"] } } }. Then prompt your agent to send a STUN request, for example: "以下のURLにSTUNのリクエストを送り、結果を出力してください stun:stun1.l.google.com:19302".

Key features of stun-mcp

  • Sends STUN Binding Requests (RFC8489)
  • Returns the STUN response (mapped address, etc.)
  • Works as an MCP server over stdio
  • Minimal STUN packet processing (basic implementation only)
  • Designed for use with AI agents in VS Code

Use cases of stun-mcp

  • Testing STUN server reachability from an AI agent
  • Obtaining the public IP address and port via STUN
  • Verifying NAT traversal capabilities in a development environment
  • Automating network diagnostics through natural language prompts

Frequently asked questions

1

What does stun-mcp do?

It sends a STUN (RFC8489) Binding Request to a given STUN server URL and returns the response, typically the mapped (public) IP address and port.

2

What are the runtime requirements?

Node.js is required to run the server. The server is executed as a stdio process.

3

How do I configure stun-mcp?

Add the server configuration to your MCP-compatible client's `mcp.json` file, specifying the path to the compiled `main.js` file.

4

Is there a warning about the implementation?

Yes. The STUN packet processing is implemented with only the minimum necessary functionality – it may not handle all edge cases or extended attributes.

5

What transport does stun-mcp use?

The server communicates via stdio. No network transport (HTTP, etc.) is used; STUN requests are sent directly over UDP by the server process.

Comments

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