Fedlex Connector
Access Swiss Federal Law from Claude
A connector that gives Claude direct access to the official text of Swiss federal legislation on Fedlex, built on the Model Context Protocol (MCP). Covers all acts in the Classified Compilation (SR, RS) in German, French, and Italian.
Why This Exists
Swiss federal law is published exclusively on Fedlex, but the frontend is a JavaScript single-page application that Claude's built-in web tools cannot render. However, Fedlex exposes two machine-readable interfaces that work without JavaScript:
- A SPARQL endpoint (
fedlex.data.admin.ch/sparqlendpoint) for metadata queries
- A static HTML filestore (
fedlex.admin.ch/filestore/...) serving consolidated legislation
This MCP server bridges the gap: it queries SPARQL for metadata (RS numbers, consolidation dates, amendment history), fetches and parses the HTML for the actual legislative text, and returns it to Claude in a structured format. No proprietary database, no cache -- just a stateless bridge to Fedlex's open data infrastructure.
Setup
The server supports two transports: stdio for local use (Claude Code, Claude Desktop) and HTTP for remote use (claude.ai, mobile). You can use one or both.
The server is hosted at:
https://mcp.fedlex-connector.ch
claude.ai / Claude Desktop / Claude mobile:
- Go to claude.ai
- Click your profile icon → Customize
- Scroll to Connectors → Add custom connector
- Enter the URL:
https://mcp.fedlex-connector.ch
The connector syncs across claude.ai, Claude Desktop, and the Claude mobile app.
Claude Code:
claude mcp add --transport http fedlex https://mcp.fedlex-connector.ch
Once connected, Claude can answer questions like "What does art. 1 of the Swiss Civil Code say?" by pulling the text directly from Fedlex.
Deploying Your Own Instance
The server includes a Dockerfile for deploying to any cloud platform that supports Docker containers (Railway, Fly.io, Render, etc.). Set the PORT environment variable and the server runs in HTTP mode. Without PORT, it runs in stdio mode for local use.
Your MCP endpoint will be at https://your-domain. Verify with:
curl https://your-domain/health
Tools
search_by_title
Search Swiss federal legislation titles in the Classified Compilation (RS/SR). Returns only acts currently in force.
| Parameter | Type | Required | Description |
|---|
query | string | Yes | Keywords to match against act titles |
language | fr de it | No | Language for results (default: de) |
Example: Find the RS number for the data protection act.
search_by_title(query="protection des données")
→ RS 235.1 — Loi fédérale sur la protection des données (LPD)
get_article
Retrieve the official consolidated text of a specific article.
| Parameter | Type | Required | Description |
|---|
rs_number | string | Yes | RS number (e.g. "210" for CC, "220" for CO) |
article | string | Yes | Article number (e.g. "3", "28a", "260bis") |
language | fr de it | No | Language (default: de) |
date | string | No | Consolidation date (YYYY-MM-DD); defaults to latest |
Example: Retrieve art. 1 CC in German.
get_article(rs_number="210", article="1", language="de")
→ Art. 1: Das Gesetz findet auf alle Rechtsfragen Anwendung...
get_law_text
Retrieve the full text of an act or a specific title/chapter. This is the primary tool for
... View full README on GitHub