Herbe en France 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://www.herbeenfrance.com/mcp (Streamable HTTP, public, no authentication, all tools read-only) 📦 Marketplace : https://herbeenfrance.com 🏛️ Wikidata : Q139847939

⚡ Quick health check

curl https://www.herbeenfrance.com/mcp
# {"name":"L'Herbe en France MCP Server","version":"1.8.0","transport":"streamable-http","tools":15,"resources":4,"prompts":2,...}

v1.8.0 (31/10/2026) : the hosted server moved from Railway (SSE, now offline) to the herbeenfrance.com app itself, on the Streamable HTTP transport, with readOnlyHint annotations on every tool. This repository keeps the stdio / SSE build for self-hosting.

Related MCP server: mpc-judilibre

🛠️ 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

📚 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.

🚀 Use it from Claude, Cursor or any MCP client

• Claude (web / desktop) : Settings → Connectors → Add custom connector → https://www.herbeenfrance.com/mcp

• Claude Code : claude mcp add --transport http herbeenfrance https://www.herbeenfrance.com/mcp

• Any client with a JSON config :

{
  "mcpServers": {
    "herbeenfrance": {
      "type": "http",
      "url": "https://www.herbeenfrance.com/mcp"
    }
  }
}

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.

🏗️ Architecture

┌──────────────┐  Streamable HTTP ┌──────────────────────────┐
│  Claude /    │ ───────────────► │  Herbe en France MCP Server    │
│  ChatGPT /   │ ◄─ JSON-RPC ─── │  (herbeenfrance.com/mcp) │
│  Cline       │                  └────────────┬─────────────┘
└──────────────┘                               │
                                               │ @supabase/supabase-js
                                               ▼
                                  ┌──────────────────────────┐
                                  │  Supabase (EU West)      │
                                  │  - products              │
                                  │  - producers (geoloc)    │
                                  │  - wiki_articles         │
                                  │  - wiki_references       │
                                  │  - cbd_market_*          │
                                  └──────────────────────────┘

Hosted by the herbeenfrance.com app on Vercel since v1.8.0. No user tracking : only UTM tags on outbound links and an anonymous per-tool call log (tool, parameters, result count, latency).

🛠️ 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

📦 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

⚖️ 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 l'Herbe en France marketplace are commercialized as wellness/cosmetic items, with no therapeutic claims, in compliance with French and EU regulation (THC ≤ 0.3%).

🤝 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@herbeenfrance.com

📄 License

MIT — see LICENSE.

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

Built in Périgord by @POP24 with Claude Code.