Open data

Observatory data, API and methodology

All aggregated observatory datasets are free to reuse: CSV downloads, a public JSON API and a changelog of methodology changes.

Open data

Downloads

API

Keyless JSON access, cached for one hour. Please keep request rates reasonable and credit the source.

GET https://api.majordia.fr/api/public/lcd-observatory
Full dataset: totals, regions, départements, published municipalities.
GET https://api.majordia.fr/api/public/lcd-observatory/history?level=commune&code=64122
Monthly history of an area (level: france, region, departement, commune).
GET https://api.majordia.fr/api/public/lcd-observatory/regulation/64122
Regulation of a municipality (rules derived from law + verified local rules).
GET https://api.majordia.fr/api/public/lcd-observatory/export/communes
CSV export (communes or departements).

Formats and fields may change; changes are recorded in the changelog below.

Licence

Licence Ouverte Etalab 2.0 — Data published under the Etalab Open Licence 2.0: free reuse, including commercial, provided the source is credited.

Suggested citation: “Majordia Observatory of property managers and short-term rentals” with a link to the observatory.

Changelog

Details of sources, geographic matching and statistical confidentiality rules are in the observatory’s methodology section.

Version 2.0 · 1 October 2026
Six languages; municipality, département and region pages; monthly history; per-municipality regulation; classified supply (Atout France register); pages with fewer than 8 players not indexed.
Version 1.1 · 30 September 2026
Weekly matching with the SIRENE register: closed businesses removed, market analysis (creations, legal form, headcount).
Version 1.0 · 30 September 2026
Launch: aggregated counts by municipality, département and region; statistical confidentiality (municipality published from 5 players, hosts < 3 hidden); open data under the Etalab Open Licence 2.0.