Lex - Temporal Luxembourg and EU Law MCP Server
Point-in-time retrieval of regulatory text. Regulators publish the current rule; every audit, investigation and dispute is about a past date. Lex keeps every version it has seen and answers "what did this say on 15 March 2022?" with the exact validity interval, the timeline, the instrument that changed it, and a hashed provenance record, and an honest, machine-readable refusal when it cannot know. It is available as a remote MCP endpoint.
Teams that want a hosted endpoint instead of running a local process. The project is written in C#.
VERIFIED ACTIVE
LAST COMMIT 2026-08-20 · ★ 9 · #667 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25
Apache-2.0 · C# · how we verify → /methodology
01 · Install Lex - Temporal Luxembourg and EU Law
before you install - you'll need
Set LEX_CODE_COMMIT, LEX_ARTICLES_COMMIT, LEX_LU_CORPUS_COMMIT, LEX_EU_CORPUS_COMMIT, LEX_INDEX_DIR before connecting.
Claude Code
claude mcp add sfhajji-lex --transport http https://law.soufien.lu/mcpClaude Desktop / Cursor / VS Code - add to config
{
"mcpServers": {
"sfhajji-lex": {
"url": "https://law.soufien.lu/mcp"
}
}
}Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.
Using another client? Same JSON, different key
Claude Desktop · mcpServers
Cursor · mcpServers
VS Code · servers
Windsurf · mcpServers
Zed · context_servers
Cline · mcpServers
Roo Code · mcpServers
Continue · mcpServers
LibreChat · mcpServers
Gemini CLI · mcpServers
Codex CLI · mcp_servers
Full setup guides: every client.
02 · Evidence
https://law.soufien.lu/mcp
transport: streamable-http
endpoint alive - responded to MCP initialize · probed 2026-08-25
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
runs as remote - your agent's requests go to law.soufien.lu
endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect
repo age created 2026-07-31 - young repo, little track record yet
license Apache-2.0 - declared in the repository
registry namespace io.github.SFHAJJI is GitHub-verified and matches the repo owner
03 · What Lex - Temporal Luxembourg and EU Law can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
Latest releases
v1.2.1 · 2026-08-07
Lex v1.2.1 - live engineering demo and cross-publisher result fusion · This release publishes the final continuous-browser engineering demo for the expanded Luxembourg/EU temporal search release. · The 74-second…
v1.2.0 · 2026-08-07
Lex now searches an expanded, temporal Luxembourg and EU corpus with deterministic keyword retrieval as the production default and optional local hybrid retrieval for conceptual questions. · What shipped · 2,647 legal…
v1.1.0 · 2026-08-05
Two ways this could answer confidently and wrongly, both closed. · A comparison across extraction profiles now refuses · Comparing the Code du travail between 2020 and 2026 reported 1,196 articles added · and 12…
04 · Who maintains Lex - Temporal Luxembourg and EU Law
Lex - Temporal Luxembourg and EU Law is maintained by sfhajji. It's the only MCP server we track from this author; the repo dates to Jul 2026.
05 · Facts
- repository
- github.com/sfhajji/lex
- category
- other - ranked #667 of 848 actively-maintained other servers as of 2026-08-25.
- release cadence
- 4 releases in the last 90 days (latest 2026-08-07)
- registry
- io.github.SFHAJJI/lex (active, first published 2026-08-07 · 2 versions)
06 · Lex - Temporal Luxembourg and EU Law FAQ
What is Lex - Temporal Luxembourg and EU Law?
Point-in-time retrieval of regulatory text. Regulators publish the current rule; every audit, investigation and dispute is about a past date. Lex keeps every version it has seen and answers "what did this say on 15 March 2022?" with the exact validity interval, the timeline, the instrument that changed it, and a hashed provenance record, and an honest, machine-readable refusal when it cannot know. It is available as a remote MCP endpoint.
Is Lex - Temporal Luxembourg and EU Law still maintained?
Yes - as of 2026-08-25, its last commit was 2026-08-20 and it shipped 4 releases in the last 90 days. We re-verify nightly.
How do I install Lex - Temporal Luxembourg and EU Law?
Run `claude mcp add sfhajji-lex --transport http https://law.soufien.lu/mcp`. The README documents 5 environment variables (LEX_CODE_COMMIT, LEX_ARTICLES_COMMIT, LEX_LU_CORPUS_COMMIT…) to set first. Set LEX_CODE_COMMIT, LEX_ARTICLES_COMMIT, LEX_LU_CORPUS_COMMIT, LEX_EU_CORPUS_COMMIT, LEX_INDEX_DIR before connecting. You can also paste the ready-made client config above.
Does Lex - Temporal Luxembourg and EU Law require authentication?
No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-08-25; you can connect without credentials.
07 · Alternatives to Lex - Temporal Luxembourg and EU Law
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