API discovery: The data.gouv.fr API RNB catalogue record points to rnb-api.beta.gouv.fr and the RNB docs for listing buildings by INSEE code, bounding box, status, BAN key, or GeoJSON format.
Why This Is Compact
The source is a focused API definition, not a same-day software change. It belongs as a compact operator brief because the decision is simple: verify a building ID before asking an agent to reason about a physical address.
Creative Example
An urban-retrofit assistant could take a Paris address, call the RNB building list or search endpoint, store the ID-RNB beside the address, and only then draft grant, audit, insurance, or works-permit questions for a human reviewer.
Copy-Paste Agent Instruction
Use the RNB docs at https://rnb-fr.gitbook.io/documentation/api-et-outils/api-batiments/lister-des-batiments.md. Build a minimal GET request to https://rnb-api.beta.gouv.fr/api/alpha/buildings/ with an INSEE code or bbox, limit results to 1-5, report each rnb_id, status, address source, and caveat before drafting any building-specific recommendation.What To Check First
What to watch: rate limits and data status. The docs name a 20-requests-per-second-per-IP limit, and a test call for insee_code=75056&limit=1 returned a constructed building with an ID-RNB and address metadata.