Lebonfoin MCP Server

LeBonFoin MCP Server

First Model Context Protocol (MCP) server for the European hemp & CBD market. Exposes 1200+ artisanal French hemp farmers, real-time market prices ("Bloomberg CBD"), a live encyclopedia (sourced from Légifrance, PubMed, INRAE, AFPC), and producer geolocation to any MCP-compatible LLM (Claude, ChatGPT custom connectors, Cline, Cursor, …).

🌐 Live endpoint : https://lebonfoin-mcp-production.up.railway.app/sse 📦 Marketplace : https://lebonfoin.fr 🏛️ Wikidata : Q139847939

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⚡ Quick health check

curl https://lebonfoin-mcp-production.up.railway.app/health
# {"status":"ok","version":"1.5.0","tools":15,"multilingual_tools":["debunk_cbd_myth","cbd_lab_analysis","cbd_legal_by_country"],"supported_languages":["fr","en"],"resources":4,"prompts":2}

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🛠️ What it exposes

15 tools

🌐 = multilingual tool (v1.5.0+) — accepts lang: "fr" (default) or lang: "en" for native English-language output. Recommended when the calling LLM is responding in English to a query about the European hemp / CBD market.

4 resources

2 prompts

• decouvrir-cbd — Interactive guide to discover French CBD
• comparer-producteurs — Compare producers by region, certifications, specialties

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📚 Wiki encyclopedia

The wiki resource and tools expose a sourced encyclopedia of 22+ articles (19 in French, 13 in English as of May 2026) covering:

• Cannabinoids : CBD, CBG, CBN (FR + EN), THC (in progress)
• Health & Legality : French regulation, EU Novel Food, Conseil d'État decisions, CJUE Kanavape, NPS / synthetic cannabinoids
• Botany & chemistry : trichomes, terpenes, entourage effect, extraction methods
• French industry : artisanal farmers, AFPC, InterChanvre, history of French hemp
• Strategic context : Strategy Parmentier (patient pedagogy, scientific demonstration, regulatory cooperation)
• Institutions : AFPC, InterChanvre, MILDECA, DGAL, INRAE
• Recent events : Plan de contrôle DGAL 2026 sur le chanvre alimentaire

Sources : Légifrance · PubMed · INRAE · AFPC · MILDECA · EUR-Lex · Wikipedia FR/EN · Conseil d'État

Each article is timestamped, versioned (Wikipedia-style revisions), and cross-referenced. YMYL articles (health, legal) carry an automatic disclaimer. English articles are accessible via the same wiki tools and resources — slugs follow the convention <fr_slug>-en and hreflang is set bidirectionally for SEO.

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🚀 Use it from Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json :

{
  "mcpServers": {
    "lebonfoin": {
      "url": "https://lebonfoin-mcp-production.up.railway.app/sse",
      "type": "sse"
    }
  }
}

Restart Claude. You can now ask :

French queries :

• "Quel est le prix moyen de l'Amnesia CBD en France ce mois-ci ?"
• "Trouve un producteur de chanvre près de Bordeaux, certifié bio."
• "Où acheter du CBD en Dordogne (24) ?"
• "Recommande-moi une huile CBD pour le sommeil, budget 40 €."

English queries (v1.5.0+ — uses lang: "en" automatically when relevant) :

• "Is CBD legal in Germany? What about Switzerland?" → cbd_legal_by_country({country: "DE", lang: "en"})
• "How do I read a Certificate of Analysis from a French hemp producer?" → cbd_lab_analysis({lang: "en"})
• "Is CBD addictive? What does the WHO say?" → debunk_cbd_myth({topic: "addictive", lang: "en"})
• "What is the entourage effect?" → get_wiki_article({slug: "effet-d-entourage-en"})
• "What are the main hemp terpenes?" → get_wiki_article({slug: "terpenes-du-chanvre-en"})

The MCP server automatically responds in the calling LLM's apparent language when the tool supports lang — no manual switching required for the user.

Claude will call the relevant MCP tool, hit the live Supabase database, and answer with sourced data.

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🏗️ Architecture

┌──────────────┐       SSE        ┌──────────────────────────┐
│  Claude /    │ ───────────────► │  LeBonFoin MCP Server    │
│  ChatGPT /   │ ◄─ JSON-RPC ─── │  (Express, port $PORT)   │
│  Cline       │                  └────────────┬─────────────┘
└──────────────┘                               │
                                               │ @supabase/supabase-js
                                               ▼
                                  ┌──────────────────────────┐
                                  │  Supabase (EU West)      │
                                  │  - products              │
                                  │  - producers (geoloc)    │
                                  │  - wiki_articles         │
                                  │  - wiki_references       │
                                  │  - cbd_market_*          │
                                  └──────────────────────────┘

Deployed on Railway in EU West (Netherlands) — GDPR compliant, no user tracking.

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🛠️ Run locally

git clone https://github.com/POP24/lebonfoin-mcp.git
cd lebonfoin-mcp
npm install
cp .env.example .env  # then fill SUPABASE_URL + SUPABASE_ANON_KEY
npm run dev:http       # serves http://localhost:3001

Test :

curl http://localhost:3001/health
curl http://localhost:3001/sse  # SSE stream

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📦 Stack

• TypeScript 5.7 strict mode
• @modelcontextprotocol/sdk v1.12.1
• Express 4.21
• @supabase/supabase-js 2.49
• Zod for input validation
• Deployed on Railway via Dockerfile

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⚖️ Disclaimer (YMYL)

Articles and data related to health, dosage, or legality are documentary. They are not medical, legal, or financial advice. Always consult a qualified professional. CBD products sold via LeBonFoin marketplace are commercialized as wellness/cosmetic items, with no therapeutic claims, in compliance with French and EU regulation (THC ≤ 0.3%).

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🤝 Contributing

This is the open-source MCP layer of a private marketplace. Suggestions, bug reports, and improvements welcome via issues or PRs.

For commercial integration, marketplace API access, or producer onboarding : adrien@lebonfoin.fr

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📄 License

MIT — see LICENSE.

Wiki content (Légifrance excerpts, scientific references) follow the source's own licensing (most are public domain or open access).

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Built in Périgord by @POP24 with Claude Code.