Ch Eli Mcp

io.github.matematicsolutionsPublished by GitHub account matematicsolutionsv0.3.3Updated Oct 24, 2026

MCP server for Swiss federal legislation via Fedlex (native ELI), verifiable citations.

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Overview

AI-generated overview

Local MCP server that lets an assistant search Swiss federal legislation on Fedlex and return verifiable ELI citations and SR numbers.

What you can do
  • Search act titles full-text in German, French, Italian or English
  • Fetch full metadata for a single act by its Fedlex ELI URI
  • Report coverage: which act families were captured, when, and what is not covered, with a fallback for each gap
  • Attach a native ELI URI, public Fedlex page URL and human-readable citation with SR number to every response
When to use it
Useful when an assistant needs to identify Swiss federal acts, their SR numbers or official Fedlex links, or to check whether a legal question falls inside the connector's coverage. Not a source for the operative text of a law.
Requirements
Runs locally as a Python package (pip install ch-eli-mcp, or uvx); needs network access to the Fedlex SPARQL endpoint. Optional environment variables CH_ELI_CACHE_DIR, CH_ELI_AUDIT_DIR and CH_ELI_BASE_URL set cache, audit and endpoint locations. No account or API key.
Before you install
Returns metadata only, not the text of the law, so citations should be checked against the linked Fedlex page. On Windows 11 with Smart App Control, unsigned launchers such as uvx.exe and pip.exe are blocked; the README advises installing via python -m pip and not disabling Smart App Control. Writes cache and audit files to local directories.

Installation

In SourceWeft

  1. Open Ch Eli Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

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

ToolPurpose
ch_search_actsFull-text search over act titles, in one of four languages
ch_get_actFull detail for one act by its Fedlex ELI URI
ch_coverageDeclare 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

bash
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:

bash
python -m pip install ch-eli-mcppython -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.

json
{ "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 varDefault
CH_ELI_CACHE_DIR~/.matematic/cache/ch-eli
CH_ELI_AUDIT_DIR~/.matematic/audit
CH_ELI_BASE_URLhttps://fedlex.data.admin.ch/sparqlendpoint

License

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

Source: README.md at commit 5f9eb4a

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.3.3LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts