How do I install Polish Open Data (unofficial)?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is Polish Open Data (unofficial) official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 55 (Fair). The formula is published on the methodology page.

MCPpedia

Polish Open Data (unofficial) MCP Server

Name: Polish Open Data (unofficial) MCP Server
Author: jaceksmi

Polish registers: KRS, VAT, bank checks, parcels, geocoding (GUGiK), optional REGON, ID validation.

Tools Versions Alternatives

Registryjaceksmi

55Fair

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "jaceksmi-polishopendata": {
      "command": "dnx",
      "args": [
        "PolishOpenData.Mcp"
      ],
      "env": {
        "POLISHOPENDATA_OFFLINE_DIR": "",
        "POLISHOPENDATA_REGON_KEY": "YOUR_POLISHOPENDATA_REGON_KEY"
      }
    }
  }
}

Install guide

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Polish Open Data (unofficial) MCP Server | MCPpedia

Environment

Name	Required	Notes
POLISHOPENDATA_OFFLINE_DIR	No	Folder for the prepared VAT whitelist flat-file indexes used by check_vat_bank_account_offline (a local disk, not a network share). Default: PolishOpenData/BialaListaOffline under the user's local application data folder.
POLISHOPENDATA_REGON_KEY	No	Optional. Your own free GUS BIR key (regon_bir@stat.gov.pl); enables the lookup_regon tool. Stays on your machine. Secret.

Polish Open Data (unofficial) MCP Server

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