French Due Diligence

A free, keyless MCP server for due diligence on French companies and dwellings, from official open data. Every tool is read-only.

Connect

Server URL (Streamable HTTP, no authentication):

https://mcp-fr.opendata-apis.workers.dev/mcp

• Claude (web or Desktop): Settings → Connectors → Add custom connector, paste the URL, choose “No sign-in”.
• Other MCP clients: add a remote server with this URL and the Streamable HTTP transport.

Tools

• validate_identifier: Checks a French SIREN (9 digits), SIRET (14 digits) or intra-EU VAT number (FR + 11 characters): format, checksum, and whether the registered company or establishment exists. Use it first when an identifier was typed by a person.
  Try: “Is FR27552032534 a valid French VAT number?”
• search_companies: Finds French companies by name, optionally narrowed by department (e.g. 75, 2A, 971), postal code or NAF activity code (e.g. 10.71C). Returns up to 10 companies with their SIREN. Use get_company next for the full profile.
  Try: “Find bakeries (NAF 10.71C) in department 75.”
• get_company: Profile of a French company by SIREN: legal name and form, activity, active or ceased, head office, officers (name and role), whether an insolvency proceeding is ongoing (in_insolvency) and its latest BODACC court announcements. Use it to answer 'can I do business with this company?'.
  Try: “Is the company with SIREN 552032534 active, is it in insolvency proceedings, and who runs it?”
• get_establishment: One establishment of a French company by SIRET: address, NAF activity, open or closed, head office or not. Use it to check a supplier's or invoice's address.
  Try: “Give me the establishment with SIRET 55203253400703.”
• check_rental_compliance: For a French postal address, returns each dwelling's energy performance certificate (DPE) and its rental verdict under the Climate and Resilience law: rentable now or not, rent frozen or not, ban date (G 2025, F 2028, E 2034), DPE validity, and the label estimated under current electricity rules. Narrow with floor, surface or address complement. Information, not legal advice.
  Try: “Can the flats at 12 rue de la République, 69002 Lyon be rented?”
• get_dpe: The dwelling of a French DPE (energy performance certificate) by its 13-character number (e.g. 2569E0160739C), with the same rental verdict as check_rental_compliance. Replaced DPEs are not available: the ADEME dataset drops them.
  Try: “Can the dwelling of DPE 2569E0160739C be rented in 2026?”

Free use and volume

The server is free for everyone within a global daily budget of tool calls. When it is spent, tools say so until midnight UTC. For volume, add your own RapidAPI key as the X-RapidAPI-Key request header of the connection: calls then go through your plan on KYB France (companies) or DPE Compliance France (housing), which have free plans. The key is passed to RapidAPI and never stored.

Sources

• Recherche d'entreprises (Sirene and RNE registers, French State), under the Licence Ouverte / Open Licence 2.0
• BODACC (Direction de l'information légale et administrative), under the Licence Ouverte / Open Licence 2.0
• DPE Logements existants (depuis juillet 2021), ADEME, under the Licence Ouverte / Open Licence 2.0
• Géoplateforme geocoding service (Base Adresse Nationale), IGN, under the Licence Ouverte / Open Licence 2.0

Limits

• Answers are information, not legal advice. Housing verdicts cover mainland France; overseas departments get no verdict.
• Company searches return the first 10 matching companies; narrow by department, postal code or activity code.
• Replaced DPEs are not available: the ADEME dataset drops them.

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