ch-eli-mcp

MCP server for Swiss federal legislation via Fedlex, the Federal Chancellery's official publication platform. Fedlex is genuinely ELI-native (European Legislation Identifier) even though Switzerland is not an EU member. Multilingual: German, French, Italian, English.

What this is not

This connector returns metadata (title, SR number) via SPARQL - not the operative text of the law. source_url points to the public Fedlex page where the full text lives.

Tools

Tool	Purpose
`ch_search_acts`	Full-text search over act titles, in one of four languages
`ch_get_act`	Full detail for one act by its Fedlex ELI URI
`ch_coverage`	Declare what this connector covers, when each family was captured, and - explicitly - what it does NOT cover. Every gap carries a fallback.

Every response carries lex_uri (the native ELI URI - not invented, taken directly from Fedlex), source_url (the public HTML page), and human_readable_citation (e.g. "Bundesverfassung der Schweizerischen Eidgenossenschaft (SR 101)" - the SR number is Switzerland's own Systematische Sammlung / Classified Compilation citation convention).

Install

pip install ch-eli-mcp

Windows 11 with Smart App Control

Smart App Control blocks unsigned executables, which covers uvx.exe, pip.exe and the ch-eli-mcp.exe launcher that pip writes at install time. The python.exe and py.exe from the python.org installer are signed by the Python Software Foundation, so running the module through the interpreter works:

python -m pip install ch-eli-mcp
python -m ch_eli_mcp

pip.exe is blocked for the same reason, so install with python -m pip, not pip install. If python is not on PATH, use the Windows launcher: py -3 -m ch_eli_mcp.

{ "mcpServers": { "ch-eli-mcp": { "command": "python", "args": ["-m", "ch_eli_mcp"] } } }

Do not turn Smart App Control off to work around this - it cannot be re-enabled without reinstalling Windows.

Configuration

Env var	Default
`CH_ELI_CACHE_DIR`	`~/.matematic/cache/ch-eli`
`CH_ELI_AUDIT_DIR`	`~/.matematic/audit`
`CH_ELI_BASE_URL`	`https://fedlex.data.admin.ch/sparqlendpoint`

License

Apache-2.0 (code). Fedlex content is official Swiss federal publication material (see SOURCES.md).

ch eli mcp