LibreJustice
About
Free remote MCP server over French and European case law and legislation: ~3.7M decisions from both French court orders plus the ECHR and the CJEU, and legal texts as they read on any past date.
Details
- Transport
- SSE
Explore
Setup
Install LibreJustice in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/librejustice/librejustice
Follow the installation instructions in the repository README, then restart your MCP client.
search_decisions
Search decisions by meaning and keywords combined. Returns a shortlist: `title`, `url`, an overview (`aiSummary`: AI-written summary of what the decision is about, a machine paraphrase never quotable as the court's words; or `snippet`: the verbatim passage where your keywords matched) and metadata; get_decision reads the full text. Put constraints in the structured filters (jurisdiction, dates, articles, codes), keep the query for the legal issue. Values within one filter are OR'd; different …
get_decision
Fetch the full text and metadata of a decision by its `url`. The text carries inline markdown links to cited articles (/texte/, open with get_legal_text) and cited decisions (/decision/, open with get_decision); a citation spanning several articles (« articles 3 à 6 », « et suivants ») links its first article and appends the others as labelled links right after the span. `appellateFate` states in one line what became of THIS decision on review (INFIRMATION = reversed, it no longer stands; CON…
list_my_activity
List the authenticated user's own activity, most recent first. `kind` selects which tab: 'searches' (past queries with their structured `filters` and `source`), 'bookmarks' or 'readingHistory' (decisions, each with `title`, a `summary` and the `url` to chain into get_decision), or 'all' to get the three at once. Only the requested tab(s) are populated. In readingHistory, `lastSource` == 'web' means the user opened the decision manually at least once (a genuine read); 'mcp' means it was only e…
get_legal_text
Fetch a statutory article as it read on a given date, by its `url` (any /texte/ link). Returns the version in force at `date` (omit for today): full text, status, validity dates, and the timeline of all versions — say which version you quote. The text carries inline markdown links to cross-referenced articles (/texte/, open with get_legal_text; when served at a date, the links point to the same date). `commentaires` carries institutional commentary anchored on the article (analyses inline, li…
search_legal_texts
Find statutory articles from their subject or wording when the article number is unknown; returns a ranked shortlist with highlighted snippets and the exact `total`. Query in French, descriptive terms (« délai de recours contentieux refus implicite »); put the code in the `code` filter (slug or exact name), keep the query for the subject. The response carries a `facets` block (`code`, `jurisdiction`): per filter name, a map of filter value to article count — reuse those keys verbatim to refin…
Utiliser LibreJustice depuis un assistant IA
Le serveur MCP public esthttps://librejustice.fr/mcp(OAuth 2.1 avec enregistrement dynamique de client : aucune clé à configurer). Cinq outils :search_decisions,get_decision,search_legal_texts,get_legal_text,list_my_activity.
Avec Claude Code, le plugin installe le connecteur et les skills d'usage :
/plugin marketplace add librejustice/librejustice /plugin install librejustice@librejustice
Les skills seuls (sans le connecteur MCP) s'installent dans n'importe quel agent compatible via](https://librejustice.fr)skills:
npx skills add librejustice/librejustice
Sur claude.ai, LibreJustice est listé dans le répertoire des connecteurs :claude.ai/directory/connectors/librejustice. Un clic, puis l'autorisation OAuth. Avec ChatGPT, Le Chat ou Perplexity : ajouter un connecteur custom pointant surhttps://librejustice.fr/mcp.
Nœud mono-serveurPostgres + ParadeDB + VectorChord(recherche hybride BM25 + vecteurs), API et front en Rust.
Workspace Cargopur Rust, scindé en deux racines :
- packages/— bibliothèques :
- lj-core— cœur pur : parsing / normalisation / extraction, résumé, refs légales.
- lj-extract— extraction des champs et citations des décisions.
- lj-sources— I/O sources (Judilibre JSON, ZIP/XML opendata).
- lj-store— accès Postgres (tokio-postgres + deadpool) + migrations.
- lj-llm— backends embedding + cache + quantisation + client Mistral (chat/OCR).
- lj-dtos— contrats API ↔ web (serde).
- lj-telemetry— tracing + export OTLP.
- lj-api— couche API (Axum + MCP rmcp + OAuth).
- lj-web— front Leptos (SSR + hydratation WASM), Tailwind.
- lj-server— déploiement unique : API + MCP/OAuth + SSR.
- lj-ingest— CLI d'ingestion + runner cron.
La toolchain Rust est épinglée parrust-toolchain.toml. On utilisemisepour les tâches :
mise run test # rustfmt --check + clippy -D warnings + cargo test --workspace mise run dev # lj-server fusionné (cargo leptos watch, :3000)
Pour une base locale :mise run dbs. La tâche prépare l'état de Postgres sousLIBREJUSTICE_STATE_DIR— propriétaire du répertoire de données, et copie de la configuration montée par le conteneur — avant de le démarrer.
Mono-serveur viapodman compose(infra/docker-compose.yml) : Postgres (ParadeDB + VectorChord), le binaire fusionnélj-server, un frontcaddyet le cron d'ingestion. Renseigner.env(voir.env.example), puis :
mise run ensure-pg # état + conf Postgres podman compose -f infra/docker-compose.yml --profile prod up -d --build podman compose -f infra/docker-compose.yml exec -T cron lj-ingest migrate # migrations
lj-serversert l'API, le MCP/OAuth, le SSR et les assets. Il écoute en clair ; c'estcaddyqui tient:443et termine le TLS, de sorte que la socket reste liée quand le conteneur applicatif est recréé.
La configuration Postgres livrée (infra/pg-conf/) porte ce que l'application exige — extensions, réglages ParadeDB, compression — avec un dimensionnement de machine de développement. Une instance de production relèveshared_bufferseteffective_cache_sizeselon son matériel.
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