SAOS (System Analizy Orzeczeń Sądowych)

Free, keyless REST API for Polish court judgments, built by ICM UW (University of Warsaw) and partners under an NCBR research grant. Covers rulings from the common courts' own publication portal, the Supreme Court, the Constitutional Tribunal, and the National Appeals Chamber (KIO) — search by keyword, court, judge, legal basis, and date range, with case numbers, panel composition, and a matched-phrase excerpt in results; full judgment text is a follow-up lookup by ID. An MCP server (mcp-saos) exposes the same search, judgment-lookup, and case-number tools, plus a citator that flags whether a judgment is still good law by scanning later citing decisions for overruling language — usable from Claude or any MCP-compatible client with no sign-up. Note: the API's data model has a field for administrative-court rulings, but SAOS's own sourcing description names only common courts, the Supreme Court, the Constitutional Tribunal, and KIO — administrative-court (NSA/WSA) coverage should be treated as unconfirmed rather than assumed comprehensive.

Added: November 5, 2026 · Last updated: November 5, 2026