IETF
A Model Context Protocol server for fetching IETF documents (RFCs) for Large Language Models.
What is IETF?
IETF is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to model context protocol server for fetching ietf documents (rfcs) for large language models.
A Model Context Protocol server for fetching IETF documents (RFCs) for Large Language Models.
This server falls under the Search & Data Extraction category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- A Model Context Protocol server for fetching IETF documents
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx ietfConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use IETF
The IETF MCP server gives AI assistants direct access to the full corpus of IETF RFC documents, enabling them to look up, search, and paginate through networking standards on demand. It downloads and caches the RFC index locally at ~/.cache/ietf-doc-server, so repeated lookups are fast without re-fetching from the network. Developers and network engineers can use this server to let their AI assistant answer questions about protocol specifications, draft standards, or historical RFCs without leaving the conversation.
Prerequisites
- Python 3.11 or higher installed
- uv or pip package manager available
- An MCP-compatible client such as Claude Desktop or the MCP inspector
- Internet access for initial RFC index download and document fetching
Clone the repository
Clone the mcp-server-ietf repository from GitHub to your local machine.
git clone https://github.com/tizee/mcp-server-ietf
cd mcp-server-ietfInstall the package
Install the server and its dependencies using pip in editable mode, or with uv for faster resolution.
pip install -e .Verify the installation
Confirm the server binary is available by running it with the MCP inspector. The server will download the RFC index on first run.
npx @modelcontextprotocol/inspector uv run mcp-server-ietfConfigure your MCP client
Add the server to your Claude Desktop configuration file so it starts automatically when Claude launches.
Start using RFC tools
Once connected, the server exposes three tools: list_docs_number (total RFC count), get_doc (fetch a specific RFC by number with pagination), and search_rfc_by_keyword (search titles). The RFC cache lives at ~/.cache/ietf-doc-server.
IETF Examples
Client configuration
Add mcp-server-ietf to your claude_desktop_config.json. The server is launched directly via Python after installation.
{
"mcpServers": {
"ietf": {
"command": "uv",
"args": ["run", "mcp-server-ietf"]
}
}
}Prompts to try
Example prompts that exercise the three exposed tools against real RFC documents.
- "How many RFCs are currently in the index?"
- "Fetch RFC 793 — what does it say about TCP connection establishment?"
- "Search RFCs with the keyword 'TLS' and list the most relevant ones"
- "Get the first 100 lines of RFC 8446 about TLS 1.3"
- "Find RFCs related to QUIC protocol and summarize what they cover"Troubleshooting IETF
The server fails to start because mcp-server-ietf command is not found
Run 'pip install -e .' from inside the cloned repository to install the entry point, or invoke it directly with 'uv run mcp-server-ietf' from the project directory.
RFC document fetches are slow or time out
The first run downloads and caches the entire RFC index. Subsequent calls read from ~/.cache/ietf-doc-server which is much faster. Ensure you have a stable internet connection for the initial cache population.
get_doc returns no content for a valid RFC number
The RFC index may not yet be cached. Run list_docs_number first to trigger the index download, then retry get_doc with the correct numeric string (e.g., "793" not 793).
Frequently Asked Questions about IETF
What is IETF?
IETF is a Model Context Protocol (MCP) server that model context protocol server for fetching ietf documents (rfcs) for large language models. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install IETF?
Follow the installation instructions on the IETF GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with IETF?
IETF works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is IETF free to use?
Yes, IETF is open source and available under the MIT license. You can use it freely in both personal and commercial projects.
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