Do I need an API key to set up the MCP server?

No. The InfraNode MCP server is keyless and free. You only enter the URL https://mcp.infranode.dev/mcp, no token, no sign-up.

Does the MCP server work with ChatGPT and Claude?

Yes. It is a remote server over Streamable HTTP and works with any client that supports remote MCP, including Claude Code, Claude Desktop, ChatGPT and Cursor.

What data do I get through the MCP server?

Open data for 84 major German cities: weather (DWD), air quality (UBA), electricity price (SMARD), land values (BORIS), real-time public transport and more: 66 data types across 12 lean tools.

Set up an MCP server in Claude and ChatGPT

Guide: set up the free, keyless InfraNode MCP server in Claude Code, Claude Desktop and ChatGPT to use open data for German cities directly in your AI assistant.

What you need

Just the server URL https://mcp.infranode.dev/mcp. The InfraNode MCP server is free, keyless and remotely hosted, nothing to install and no key to request.

Claude Code

One command in the terminal:

claude mcp add --transport http infranode https://mcp.infranode.dev/mcp

Claude Desktop and ChatGPT

Add the server as a connector via its URL. In config files it looks like this:

{
  "mcpServers": {
    "infranode": {
      "url": "https://mcp.infranode.dev/mcp"
    }
  }
}

In clients with a graphical interface, add a connector or remote MCP server instead and enter the URL https://mcp.infranode.dev/mcp.

Done: just ask

After that the assistant calls the right tools itself. Examples:

What is the weather in Hamburg right now?
How is the air quality in Munich?
What is today's spot electricity price?

An overview of all tools and setup is on the MCP server page. What MCP is in the first place is explained in What is an MCP server.

Frequently asked questions

Do I need an API key to set up the MCP server?: No. The InfraNode MCP server is keyless and free. You only enter the URL https://mcp.infranode.dev/mcp, no token, no sign-up.
Does the MCP server work with ChatGPT and Claude?: Yes. It is a remote server over Streamable HTTP and works with any client that supports remote MCP, including Claude Code, Claude Desktop, ChatGPT and Cursor.
What data do I get through the MCP server?: Open data for 84 major German cities: weather (DWD), air quality (UBA), electricity price (SMARD), land values (BORIS), real-time public transport and more: 66 data types across 12 lean tools.