MCP connector for Claude

Poland Public Data

Official Polish statistics (GUS: headline indicators and the Local Data Bank), the national open data portal dane.gov.pl, and public contracts and tenders from the e-Zamówienia procurement bulletin (BZP). Public data; a free GUS BDL key is optional.

Add it to Claude

1. Create an account and add credits at https://openjack.dev; copy your connection key.
2. In Claude, open Settings → Connectors → Add custom connector and paste https://poland-public-data.openjack.dev/mcp.
3. Click Connect. You will be asked for the connection key and your Dane publiczne Polski credentials.

How your data is handled

Your Dane publiczne Polski credentials are validated once, then stored encrypted with a key that only the token issued to your Claude account can unwrap. Disconnecting the connector in Claude revokes that token. The connector keeps no logs and no cache, and stores none of the data it passes to Claude. Every tool is read-only.