Compabase
Real-estate prices · Free · no API key

What do flats nearby really sell for?

Prices from notarial deeds, not listings: median per m², trend, primary and secondary market. Plus a land-parcel report – zoning plan, utilities and flood risk.

MCP server address

https://ceny.compabase.com/mcp
How to connect

What it does

  • Actual transaction prices

    Median and spread of prices per m² for flats, houses and plots from the official register – without addresses of individual units.

  • Trend and structure

    Prices by year, by number of rooms and for the primary and secondary market.

  • Land-parcel report

    Land register, local zoning plan, utilities, flood risk and nature protection areas.

How to connect

Paste the server address into your assistant's settings. No account or API key needed.

  1. Claude

    Settings → Connectors → Add custom connector → paste the server address.

  2. ChatGPT

    Settings → Connectors (developer mode) → add an MCP server with this address.

  3. Claude Code, Cursor, VS Code

    Add an HTTP server with the address above, e.g. claude mcp add --transport http ceny-nieruchomosci https://ceny.compabase.com/mcp

  4. Locally

    Run it yourself with npx -y ceny-nieruchomosci-mcp (stdio) – the code is open source.

Ask, for example

  • What is the price per m² of a flat in Warsaw's Mokotów?
  • How have building-plot prices changed in Kórnik?
  • What is known about parcel 302101_2.0008.123?
  • House prices within 2 km of the market square in Wieliczka.

Data sources

GUGiK – property price register (notarial deeds), land register, zoning plans, utility network maps, ISOK flood maps and GDOŚ. Deed data appears with a delay of several months.

Source code under the MIT licence: GitHub · npm

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