Browse · Decisions

Swiss court decisions

The largest open dataset of Swiss court decisions from all federal courts and 26 cantons — plus direct access to 5,516 federal laws and 15,722 cantonal enactments. Search instantly with AI or download the full dataset.

Fedlex SPARQL endpoint mirrored monthly and indexed in SQLite (FTS5): 5,516 federal laws, ~133,468 articles in DE/FR/IT, full amendment history. Cantonal legislation locally mirrored from LexFind (~30,000 acts, monthly refresh, live API as fallback). Article lookup in <1 ms.

Federal law (local) get_law("OR", article="41")

Cantonal (Portale + LexFind) search_legislation("Mietrecht", canton="ZH")

Recent amendments browse_legislation_changes(canton="CH")

Access the Data

Search with AI

Search over 1,050,000 Swiss court decisions in natural language. Find relevant cases, trace citations between decisions, analyze legal trends, and draft research memos.

Remote (recommended)

Instant, always current. No download needed.

Claude Desktop
Settings → Connectors → Add →
https://mcp.opencaselaw.ch

Claude Code

claude mcp add swiss-caselaw \
  --transport sse \
  https://mcp.opencaselaw.ch

ChatGPT (Pro/Team/Enterprise)
Settings → Apps → Advanced settings → enable Developer mode → Create app → name "Swiss Caselaw", paste URL below, auth: None. In chat: + → Developer mode → select app. Recommended with GPT-5.3 (GPT-5.4 does not currently support MCP tool invocation).
https://mcp.opencaselaw.ch/sse

Gemini CLI

// ~/.gemini/settings.json
{ "mcpServers": {
    "swiss-caselaw": {
      "url": "https://mcp.opencaselaw.ch"
    }
}}

Claude: Pro, Max, Team, or Enterprise (Desktop) / any plan (Code). ChatGPT: Plus, Pro, Team, Enterprise, or Edu. Gemini CLI: free.

Local (offline)

Full control, works offline. ~65 GB disk, 30–60 min setup.

Clone → install → register with any MCP client
Full setup guide →

Works with any MCP client. Local mode includes database update tools.

What you can do after connecting:

Search decisions in natural language — by keyword, topic, statute, or legal concept
Look up any decision by docket number — with full text and metadata
Retrieve the current text of 5,516 federal laws (~133,468 articles, DE/FR/IT) — and search 15,722 cantonal enactments
View statistics and coverage across all federal and cantonal courts
Find leading cases for any law or legal area, ranked by citation count
Trace citation networks — see what a decision cites and what cites it
Analyze how jurisprudence on a topic has evolved year by year
Draft research memos from case facts — with relevant case law and statutes

Download

Download the full dataset as Parquet files

from datasets import load_dataset
ds = load_dataset("voilaj/swiss-caselaw")

REST API

Query via HuggingFace Datasets Server API

GET /rows?dataset=voilaj/swiss-caselaw
  &config=default&split=train
  &offset=0&length=10

Web UI

Local chat interface — ask questions in natural language, get answers with cited decisions. Runs on your machine with Claude, OpenAI, Gemini, or local models via Ollama (no API key needed).

git clone github.com/jonashertner/caselaw-repo-1
cd caselaw-repo-1
./scripts/run_web_local.sh

Coverage

Decisions per Year

Language Distribution

Federal Courts

Court	Decisions	New Data	Languages

Cantonal Courts

Court	Canton	Decisions	New Data

Cantons

Browse

Scraper Health

Court	Status	New	Duration	Total Known	JSONL	Last Data