Claude with Polish and EU law at the source
Repertorium is in the Claude connector directory. Once connected, Claude searches for provisions and judgments in a corpus of law, and gives the document identifier and the place in the text for every result. You can check the answer before it goes into a brief.
Repertorium in the Claude connector directory
01How to connect
- Open the Repertorium entry in the connector directory and click "Connect".
- Enter your email address, then the 6-digit code from the message. The message with the code contains no link.
- Allow access on the consent screen. Claude gets read-only access to the database.
It works on the Free, Pro and Max plans, in claude.ai and in the desktop and mobile apps. On Team and Enterprise plans the organisation owner adds the connector, and everyone else just clicks "Connect". Claude Code and other developer tools: connector page.
02What it looks like in a conversation
A test from 3 November 2026. In the case number of a real Supreme Court judgment, II CSKP 112/21 of 15 December 2021, we deliberately swapped two letters, making it II CKSP.
Check these citations in Repertorium: III CZP 41/12, II CKSP 112/21, art. 415 k.c.
- III CZP 41/12 - found, a Supreme Court resolution of 18 July 2012,
- II CKSP 112/21 - not in the corpus, but Repertorium suggests the correct case number II CSKP 112/21,
- art. 415 k.c. (Article 415 of the Civil Code) - Repertorium knows of no amendments to this article after the date you check against.
Claude writes the answer; Repertorium gives it documents with identifiers that you can check at the source. If the answer sounds too smooth, ask: "Is this list complete, and what does Repertorium not know here?".
You can ask in English. The Polish corpus is in Polish, so keep Polish citation forms such as art. 415 k.c., or ask Claude to search in Polish. More in the user guide.
03What Claude finds through Repertorium
- provisions in the consolidated text in force, and which text of an act was in force on the day of an event,
- judgments of the common courts, the Supreme Court, the administrative courts, the National Appeal Chamber (KIO) and the Constitutional Tribunal (up to 2015),
- tax rulings and decisions of the competition authority (UOKiK) and the data protection authority (UODO),
- EU law and CJEU case law, together with the directives a Polish statute implements,
- citations: what a document cites, who cites it, and whether a line of case law is still alive.
Ten questions Repertorium answers, and ready-made prompts: user guide.
04Confidentiality
The query and the answer are seen by Anthropic, the company that runs Claude. Searching the law needs no names, companies or matter details, so leave them out. The instruction that asks Claude to do this for you is pasted once: confidentiality instruction for Claude. What we store on our side: connector page.
05Questions
Do I need a paid Claude plan?
No. Repertorium also works on the Free plan.
How much does it cost?
A Repertorium account is free, with a call limit. Current limits: connector page.
How is this different from web search in Claude?
Web search returns pages. Repertorium returns documents from a corpus of law, with an identifier and a place in the text, and says plainly what it does not have.
Does Repertorium see my conversations and files?
No. It receives only the database query, and it only reads.
Using ChatGPT?
Repertorium for ChatGPT. Same account, same corpus.