MCP server for German federal laws, EU regulations/directives, and German federal court decisions — hybrid semantic + BM25 search across the full corpus, with verified citation lookup, table-of-contents navigation, and norm-to-case-law tracing.
Lawbster makes German and EU primary law machine-readable for AI assistants via the Model Context Protocol. The server indexes the full body of German federal law (Gesetze-im-Internet — thousands of statutes and regulations), EU regulations and directives (EUR-Lex), and the full case-law of all German federal supreme courts and the EU courts. Lawbster isn’t just another AI tool built in isolation. The underlying logic, the compliance checks, and the regulatory frameworks it draws on were shaped with input from experienced lawyers at Planit // LEGAL a leading IT and data protection law boutique — practitioners who work with these regulations day to day, not just in theory.
Search uses a three-stage hybrid pipeline (dense vector + BM25 sparse → RRF fusion → cross-encoder reranking), so colloquial questions resolve against statutory language. Citations like § 823 BGB, Art. 6 DSGVO, or C-311/18 resolve to verified full text — never hallucinated. The norm → Rechtsprechung chain surfaces the controlling case-law line behind a statute, which is often more decisive than the bare statute text.
The current launch corpus covers German federal law and EU law. Additional jurisdictions and source types are on the roadmap — UK law (UK Public General Acts, UKSC/EWCA case-law) is the next planned expansion, followed by further European jurisdictions (e.g. AT, CH, FR, NL). The MCP tool surface stays stable; new jurisdictions are added via the existing jurisdiction filter and source_type enum, so existing client integrations keep working.
