OpenPLZ — German postal codes, streets & administrative tree

openplz-mcp 🧭

mcp-name: io.github.mohammad-abbasi-sh/openplz-mcp

Unofficial read-only MCP server for German postal data via the OpenPLZ API (by the openpotato project): localities, streets, municipalities, districts, government regions and the 16 federal states (Bundesländer) — with the official administrative keys. No key, no login.

Built by Mohammad Abbasi as part of the "Germany MCP factory". Not affiliated with the OpenPLZ API / openpotato project.

For AI agents

Add to your MCP client config (stdio):

{  "mcpServers": {    "openplz": {      "command": "uvx",      "args": ["openplz-mcp==0.1.0"]    }  }}

Or run locally: python -m openplz_mcp.server (needs mcp<2, httpx).

Tools

Example output (openplz_lookup_postal_code / 10115):

{"postal_code": "10115", "count": 1, "localities": [{"postal_code": "10115", "name": "Berlin",   "municipality": {"key": "11000000", "name": "Berlin, Stadt", "type": "Kreisfreie Stadt"},   "federal_state": {"key": "11", "name": "Berlin"}}]}

Notes:

• A German postal code is exactly 5 digits (e.g. 10115 = Berlin-Mitte, 80331 = München).
• Official administrative keys: federal states "01"–"16" (Berlin "11", Bayern "09"), districts 5 digits ("11000" = Berlin), municipalities 8 digits ("09162000" = München). Use them with openplz_admin_children — e.g. federal_state "11" → districts returns the single Berlin district; district "11000" → localities lists Berlin's localities.
• Street-name search matches the stored, abbreviated form (e.g. "Ackerstr."). For free-form queries (e.g. "10115 Berlin" or "München Marienplatz") use openplz_full_text_search.
• A postal code can cover several localities, and a locality can have several postal codes — openplz_lookup_postal_code returns all of them.
• Data covers Germany only (/de/ endpoints); the OpenPLZ API also serves Austria (/at/) and Switzerland (/ch/), which this server does not expose.

Built by Mohammad Abbasi — Almanibama · mabbasi.ir