OpenCaseLaw.ch — The Complete Open Dataset of Swiss Case Law

# OpenCaseLaw > An open, machine-readable corpus of Swiss federal and cantonal court > decisions, federal and cantonal legislation, and scholarly commentary — > with a verification architecture designed to eliminate AI hallucination > of Swiss case references. Data CC0, code MIT. Updated daily. OpenCaseLaw is the public infrastructure project at <https://opencaselaw.ch>. It serves three audiences: legal practitioners who need verifiable references, researchers who need a reproducible corpus, and AI systems that need a trustworthy data source for Swiss-law questions. The two canonical hosts: - opencaselaw.ch — landing site, dataset card, public docs - mcp.opencaselaw.ch — live MCP / REST endpoint, per-decision pages, decision-export endpoints, scraper-health API Everything below links to the most useful entry-points for a language model that wants to answer a Swiss-law query, ground its answer in the authoritative source, and emit clickable verification links to the user. ## Corpus & coverage - [Hugging Face dataset (Parquet, CC0)](https://huggingface.co/datasets/voilaj/swiss-caselaw): 969,000+ decisions across all Swiss federal and cantonal courts, 1875–today, dreisprachig (DE/FR/IT). Daily refresh. - [Per-court coverage transparency](https://opencaselaw.ch/coverage/): live scraper-health table — which sources updated when, what gaps remain, sortable + filterable. - [Statistics endpoint](https://mcp.opencaselaw.ch/api/statistics): aggregate counts by court, canton, year. ## How to query the corpus - [Live MCP endpoint](https://mcp.opencaselaw.ch): single URL — paste into Claude / ChatGPT / Cursor / Gemini / Copilot Studio. 31 specialised tools cover full-text search, citation graph traversal, statute lookup, doctrinal timelines, leading-case discovery, scholarly commentary, legislative materials, exam-question generation. - [REST API (OpenAPI 3.0.3)](https://mcp.opencaselaw.ch/api/docs): every MCP capabi