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OpenCaseLaw — Swiss Caselaw, Statutes & Doctrine
ch.opencaselaw/swiss-caselaw in the official MCP registry.
Endpoint https://mcp.opencaselaw.ch/mcp. Source: github.com/jonashertner/caselaw-repo-1.
The registry describes it as: 1M+ Swiss court decisions, statutes & doctrine with citation graph (DE/FR/IT). CC0, free, 42 tools.
We read its 42 tools on 2026-10-26. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
search fetch search_decisions get_decision get_decisions list_courts get_statistics find_citations find_appeal_chain find_leading_cases analyze_legal_trend draft_mock_decision get_case_brief get_decision_structure get_erwaegung find_relevant_erwaegung get_article_purpose search_botschaft get_article_history get_regeste check_claim_support attest_response cite get_doctrine generate_exam_question get_law search_laws get_commentary search_commentaries search_scholarship get_scholarship find_scholarship_citing_statute find_scholarship_citing_decision list_scholarship_sources get_scholarship_full_text get_materialien search_materialien search_legislation get_legislation browse_legislation_changes search_practice get_practice
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[](https://lazaretto.dev/mcp-registry/ch-opencaselaw-swiss-caselaw)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.