Tankerkönig MCP — Live German Fuel Prices for AI Assistants

An MCP server that gives Claude, Cursor, or any MCP-compatible AI assistant access to real-time fuel prices at 14,000+ gas stations in Germany.

The data is official: German law requires every filling station to report price changes in real time to the Markttransparenzstelle für Kraftstoffe (MTS-K) at the Federal Cartel Office. Tankerkönig redistributes that feed free of charge under CC BY 4.0.

Deutsch: MCP-Server für aktuelle Benzin- und Spritpreise in Deutschland. Findet die günstigste Tankstelle (E5, E10, Diesel) in deiner Nähe — direkt im KI-Chat.

What you can ask

Once connected, just talk to your assistant normally:

• "Where's the cheapest E10 near Munich right now?"

• "Show me diesel prices within 10 km of Hamburg Hauptbahnhof."

• "I'm driving Stuttgart → Nuremberg tomorrow. Where should I fill up?"

• "Wo tanke ich gerade am günstigsten in Köln?"

Example response:

DIESEL prices, cheapest first:
• 2.209 € — Sprint, Residenzstr. Berlin (4.9 km)
• 2.219 € — Shell, Prinzenallee Berlin (4.3 km)
• 2.269 € — TotalEnergies, Chausseestr. Berlin (2.6 km)

Data: tankerkoenig.de (MTS-K, CC BY 4.0)

Related MCP server: opinet-mcp

Tools

Only open stations with a current price are returned, sorted cheapest first. Place names are resolved via OpenStreetMap Nominatim.

Setup

1. Get a free API key (2 minutes + approval wait)

Tankerkönig issues a personal key to every user — this is required by their terms, so the server cannot ship with a shared one.

1. Go to creativecommons.tankerkoenig.de

2. Fill in the form (name, email, purpose — "personal / hobby project" is fine)

3. Confirm the email you receive

4. The key arrives by email. Approval is manual, so it can take anywhere from a few minutes to a couple of days.

The key is free and has no usage cost.

2a. Hosted (easiest)

Available on the MCPize marketplace:

mcpize install tankerkoenig-mcp

You'll be prompted for your Tankerkönig key; it is stored per-user and never shared.

2b. Local install

git clone https://github.com/fluxionlabsai-ops/tankerkoenig-mcp.git
cd tankerkoenig-mcp
python3 -m venv .venv
.venv/bin/pip install .

Then add it to your MCP client. For Claude Desktop, edit claude_desktop_config.json:

{
  "mcpServers": {
    "tankerkoenig": {
      "command": "/absolute/path/to/tankerkoenig-mcp/.venv/bin/python",
      "args": ["/absolute/path/to/tankerkoenig-mcp/server.py"],
      "env": { "TANKERKOENIG_API_KEY": "your-key-here" }
    }
  }
}

For Claude Code:

claude mcp add tankerkoenig \
  -e TANKERKOENIG_API_KEY=your-key-here \
  -- /absolute/path/to/tankerkoenig-mcp/.venv/bin/python \
     /absolute/path/to/tankerkoenig-mcp/server.py

Restart your client, and ask it about fuel prices.

Security notes

The API key is read only from the TANKERKOENIG_API_KEY environment variable — never from a file in the repo, and never hard-coded.

Tankerkönig passes the key as a URL query parameter, which HTTP client libraries happily log at INFO level. This server explicitly silences the httpx logger in both the entry point and the core module, and strips the request URL out of upstream HTTP errors before they surface. Both behaviours are covered by regression tests (test_http_error_does_not_leak_key, test_httpx_logger_muted_on_plain_import).

Tests

.venv/bin/python -m unittest test_tankerkoenig -v

Attribution & licence

• Code: MIT — see LICENSE.

• Data: © Tankerkönig, sourced from Markttransparenzstelle für Kraftstoffe, licensed CC BY 4.0. Every response from this server carries that attribution — please keep it if you build on this.

• Geocoding: © OpenStreetMap contributors, ODbL.

Not affiliated with Tankerkönig, MTS-K, or the Bundeskartellamt.

Keywords: German fuel prices MCP · Benzinpreise · Spritpreise · Dieselpreis · Tankstellen Deutschland · MTS-K API · Tankerkönig API · cheapest gas station Germany · Claude MCP server · Model Context Protocol