ch.fedlex-connectorPublished by fedlex-connector.chOfficial publisherv1.0.0Updated Oct 24, 2026
Search Swiss federal legislation: laws, articles, amendments via the Fedlex SPARQL endpoint.
Remote MCP server that lets an assistant search and read official Swiss federal legislation from Fedlex, including laws, articles and amendment dates.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/ch.fedlex-connector%2Ffedlex-connector/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.Add this to your client's mcpServers config.
{
"mcpServers": {
"fedlex-connector": {
"type": "http",
"url": "https://mcp.fedlex-connector.ch/"
}
}
}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.
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:
fedlex.data.admin.ch/sparqlendpoint) for metadata queriesfedlex.admin.ch/filestore/...) serving consolidated legislationThis 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.
The server supports two transports: stdio for local use (Claude Code, Claude Desktop) and HTTP for remote use (claude.ai). You can use one or both.
The server is hosted at:
claude.ai / Claude Desktop:
https://mcp.fedlex-connector.chWe suggest naming it "Fedlex Connector".
Claude Code:
Once connected, Claude can answer questions like "What does art. 1 of the Swiss Civil Code say?" by pulling the text directly from Fedlex.
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:
search_by_titleSearch Swiss federal legislation titles in the Classified Compilation (RS/SR). Returns only acts currently in force.
Example: Find the RS number for the data protection act.
get_articleRetrieve the official consolidated text of a specific article.
Example: Retrieve art. 1 CC in German.
get_law_textRetrieve the full text of an act or a specific title/chapter. This is the primary tool for reading and analysing legislation from the source.
Large acts are paginated automatically (splitting at article boundaries). Each response includes the total page count.
Example: Retrieve Swiss tenancy law (CO, Title 8).
list_amendmentsList recent amendments (consolidation versions) for a given act.
Example: Check recent changes to the CO.
Metadata path (SPARQL): The server queries Fedlex's SPARQL endpoint (JOLux ontology) to resolve RS numbers to internal URIs, find the latest consolidation date, discover HTML file URLs, and list amendment history.
Text path (HTML filestore): Once the server knows which HTML file(s) to fetch, it retrieves them from the static filestore, parses the DOM with Cheerio, and extracts the requested article, section, or full text. Large acts (like the CO with 1,100+ articles) are split across multiple HTML files which the server discovers and stitches together automatically.
Data flow for a typical request:
get_article(rs_number="210", article="3")Every response includes a footer noting that only the Official Compilation (RO/AS) published by the Federal Chancellery is legally authoritative.
The server returns structured errors with codes and actionable suggestions:
Full act historical versions: get_law_text only retrieves full acts as they are currently in force and does not return past versions. For historical text, use get_article, which supports a date parameter.
HTML availability: Fedlex generally only provides HTML for consolidations from 2021 onwards. Older versions are only available as PDF or DOC on the Fedlex platform. The server returns a clear error with guidance when HTML is unavailable for a requested date.
Rate limiting: The SPARQL endpoint and filestore are public Swiss government services. The server limits itself to 10 requests/second per endpoint to be a responsible client.
Section filtering: The section parameter in get_law_text uses heading-text matching which works well for standard section names but may not match unusual headings. When filtering fails, the full act text is returned with a note.
Language coverage: Supports French (FR), German (DE), and Italian (IT). Romansch is not available.
Scope: Covers federal law in the Classified Compilation only. Cantonal law, the Federal Gazette, and court decisions are out of scope.
MIT
Source: README.md at commit 810e953
Search Swiss federal legislation titles in the Classified Compilation (RS/SR) on Fedlex. Use to find the RS number of a law when you know its name but not its number. Searches titles only, not article content. Returns only acts currently in force.
queryrequiredlanguageRetrieve a single article when you already know the EXACT article number (e.g. from a cross-reference). Do NOT call this tool repeatedly to search for provisions — use get_law_text instead to fetch the full act or a section and locate relevant articles in the text.
datearticlerequiredlanguagers_numberrequiredRetrieve the official consolidated text of a Swiss federal act (or a specific title/chapter) directly from Fedlex (fedlex.admin.ch). This is the PRIMARY tool for answering Swiss law questions — always start here. Fetch the full act or a specific section, then locate relevant provisions in the returned text. Prefer this over get_article unless you already know the exact article number.
pagesectionlanguagers_numberrequiredList consolidation version dates for a Swiss federal act. Returns the dates each consolidated version took effect.
sincelanguagers_numberrequired100% 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.
https://mcp.fedlex-connector.chclaude mcp add --transport http fedlex https://mcp.fedlex-connector.chcurl https://your-domain/healthsearch_by_title(query="protection des données")→ RS 235.1 — Loi fédérale sur la protection des données (LPD)get_article(rs_number="210", article="1", language="de")→ Art. 1: Das Gesetz findet auf alle Rechtsfragen Anwendung...get_law_text(rs_number="220", section="Titre huitième", language="fr")→ [Full text of tenancy provisions, art. 253 onwards]list_amendments(rs_number="220", since="2024-01-01")→ 2026-01-01 — Version in force from 2026-01-01 (current) 2025-10-01 — Version in force from 2025-10-01 to 2025-12-31 ...Claude ──MCP──> Fedlex Connector ──SPARQL──> fedlex.data.admin.ch ──HTTP───> fedlex.admin.ch/filestore/...src/ index.ts # Entry point: picks stdio or HTTP transport based on PORT env var server.ts # MCP server factory: tool definitions and request handlers types.ts # TypeScript interfaces, error types, constants sparql.ts # SPARQL endpoint queries (metadata, RS resolution, amendments) filestore.ts # HTML fetching, parsing, article/section extraction, paginationbuild/ # Compiled JavaScript (generated by tsc)Dockerfile # Container build for cloud deployment