Fr Eli MCP

fr-eli-mcp

Install (one command)

Published on PyPI + MCP Registry (io.github.matematicsolutions/fr-eli-mcp). Run without cloning:

uvx fr-eli-mcp

Requires PISTE credentials in env: PISTE_CLIENT_ID, PISTE_CLIENT_SECRET (Legifrance/PISTE).

Configure your MCP client (stdio):

{ "mcpServers": { "fr-eli-mcp": { "command": "uvx", "args": ["fr-eli-mcp"] } } }

Windows 11 with Smart App Control

Smart App Control blocks unsigned executables, which covers uvx.exe, pip.exe and the fr-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:

python -m pip install fr-eli-mcp

python -m fr_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 fr_eli_mcp.

{ "mcpServers": { "fr-eli-mcp": { "command": "python", "args": ["-m", "fr_eli_mcp"] } } }

Do not turn Smart App Control off to work around this - it cannot be re-enabled without reinstalling Windows.

Building from source: see Install.

An MCP server for the French Legifrance API via PISTE. It searches French legislation (LODA laws & decrees, codes), case law from three jurisdictions - Cour de cassation / cours d'appel (JURI), the Conseil constitutionnel (CONSTIT - QPC/DC decisions) and the administrative courts (CETAT - Conseil d'Etat, cours administratives d'appel, tribunaux administratifs) - plus CNIL deliberations (CNIL), collective labour agreements (KALI) and company-level agreements (ACCO), and returns verbatim text with verifiable citations. Part of the eu-legal-mcp line of national legal connectors by MateMatic.

Every response carries the citation contract: a stable eli_uri, a human_readable_citation (French convention) and a resolvable source_url.

Read-only. The server only queries Legifrance and writes a local audit log. It never modifies

official text and never sends anything beyond your query / document id.

Tools

Fonds covered (live totals, sandbox, 2026-07-08)

Jurisdictions covered

Conseil constitutionnel decisions get the French citation convention: Cons. const., decision n° 2025-1173 QPC du 7 novembre 2025 - [case name]. JURI/CETAT decisions cite the Legifrance titre (court, formation, date, dossier number) verbatim.

Judilibre (api.piste.gouv.fr/cassation/judilibre) was evaluated as an alternative Cour de

cassation source but requires its own PISTE API subscription beyond the Legifrance one already

held by this connector. Re-verified 2026-07-08: a valid Legifrance token (granted scope

openid resource.READ) gets 403 on the sandbox host for every endpoint and auth shape tried

(Bearer, KeyId, no-auth -> 400), and the sandbox application is rejected outright by the

production OAuth endpoint (invalid_client). Subscribing the Judilibre API to the PISTE

application is a dashboard action outside this connector. Not integrated - JURI already covers

Cour de cassation case law through the existing Legifrance subscription.

A note on ELI vs ECLI

France has an official ELI scheme, but the PISTE lf-engine-app consult API returns the native ELI field `null` for the legislation we tested. Following this line's rule - *say what you do not have, never fabricate an ELI* - eli_uri carries the stable, resolvable Legifrance resource URL (CID-keyed), not a /eli/... string parsed from prose. Each response repeats this in eli_note.

Case law is different: the API returns a native, authoritative ECLI for Cour de cassation (e.g. ECLI:FR:CCASS:2025:C100399), Conseil constitutionnel (e.g. ECLI:FR:CC:2025:2025.1173.QPC) and Conseil d'Etat (e.g. ECLI:FR:CECHR:2026:506507.20260529), surfaced verbatim in fr_get_decision. CAA/TA decisions under CETAT frequently have no ECLI - the field is null, never fabricated.

Configuration

Legifrance requires OAuth2 application credentials from a free PISTE account (piste.gouv.fr → *Applications* → subscribe to the Legifrance API → *OAuth Credentials*). Credentials are read from the environment only:

Copy .mcp.json.example to .mcp.json (gitignored) and fill in your credentials, or set the variables in your host environment. The OAuth token is cached in memory and refreshed automatically.

Install

py -3.13 -m venv .venv

.\.venv\Scripts\python.exe -m pip install -e ".[dev]" # Windows

or: python -m pip install -e ".[dev]" # POSIX

Tests

pytest tests/test_instructions_drift.py tests/test_parse.py   # offline, no creds

pytest tests/test_smoke.py -v # live, needs PISTE creds in .env

Distribution

Because Legifrance requires a PISTE key, this connector is distributed through the PATRON / appliance channel (governed), not casual drop-in download. See the eu-legal-mcp line notes.

Licence

Apache-2.0. Legifrance content is © the French Republic / DILA and subject to the Legifrance / PISTE terms of use; this software only retrieves and cites it.