Fedlex MCP server

:switzerland: Part of the Swiss Public Data MCP Portfolio

:balance_scale: fedlex-mcp

MCP Server for Swiss federal law, consultations & official terminology — search the SR, monitor consultation deadlines, and translate terms across the national languages via Claude Desktop or Claude.ai

:de: Deutsche Version

Overview

fedlex-mcp connects AI assistants (Claude) with three official Swiss SPARQL data sources:

1. Federal law via the Fedlex SPARQL endpoint — the Systematic Compilation (SR), Official Compilation (AS), Federal Gazette (BBl) and treaties.
2. Consultations (Vernehmlassungen) via the same Fedlex endpoint (jolux:Consultation) — the pre-parliamentary phase in which anyone can comment on a draft.
3. TERMDAT, the Federal Chancellery's terminology database, via the LINDAS SPARQL endpoint — official term equivalents across de/fr/it/rm/en.

All three are SPARQL-based, which is exactly why they live in one server rather than three: no new technology stack, only new queries against known patterns.

Metaphor: USB-C for federal law. Fedlex tells you what you have to respond to. TERMDAT tells you what it is called in the other national languages.

Features

• :balancescale: 12 tools, 2 resources** across federal law, consultations and terminology
• :mag: SPARQL-powered — two isolated endpoints (Fedlex + LINDAS), no shared failure mode
• :globewithmeridians: 5 languages — German, French, Italian, Romansh, plus English for terminology
• :unlock: No API key required — all data under open reuse licences
• :cloud: Dual transport — stdio (Claude Desktop) + Streamable HTTP (cloud)

Anchor demo query

"Which education-related consultations are currently open, until when does the deadline run, which office is in charge — and what are the key technical terms in French and Italian for the response?"

A single conversation chains three tools across two endpoints:

fedlex_get_open_consultations(topic="education")
   → fedlex_get_consultation(event_id="proj/2026/71/cons_1")
   → termdat_lookup_term(term="Volksschule", target_languages=["fr","it"])

Every open consultation carries deadline, daysremaining (computed at request time in Europe/Zurich, 0 = deadline is today) and a derived status — an expired consultation never shows up as running. Fedlex says what you must respond to and by when; TERMDAT says how to name it* in the other national languages.

Use topic="education", not keyword="Volksschule". Fedlex consultations

have no subject taxonomy — filtering is free-text over the title, and the word

"Volksschule" appears in zero consultation titles. The topic filter

expands to a disclosed keyword union (Bildung, Schule, Berufsbildung,

Hochschule, …) and reports exactly which terms it searched.

Prerequisites

• Python 3.11+
• uv (recommended) or pip

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Installation

Run via uv's uvx — no clone or manual install needed. Add to your MCP client config (mcpServers for Claude Desktop, Cursor and Windsurf; use a top-level servers key for VS Code in .vscode/mcp.json):

Shortened. The full README is on GitHub.