BumiAtlas MCP

Luxembourg: Plan Cadastral Numérisé parcels

Luxembourg's cadastral parcels from the ACT's Plan Cadastral Numérisé, as tools an AI assistant can call: find a parcel by id, lieu-dit and number, or coordinates, read its section and nature, and see it on a map with its neighbours.

Server URL

Streamable HTTP with OAuth. The first time you connect, your client opens a browser window to sign in with Google; no API key needed.

https://bumiatlas.com/mcp/luxembourg

Connect

Claude (claude.ai, desktop)

Settings → Connectors → Add custom connector, paste the URL, then Connect and sign in with Google.

Claude Code

claude mcp add --transport http bumiatlas-luxembourg https://bumiatlas.com/mcp/luxembourg

ChatGPT

Settings → Apps & Connectors → Advanced → Developer mode, then Create with the URL and OAuth authentication.

Cursor

in ~/.cursor/mcp.json

{
  "mcpServers": {
    "bumiatlas-luxembourg": {
      "url": "https://bumiatlas.com/mcp/luxembourg"
    }
  }
}

Tools

Tool names and descriptions are in English, which models understand best; your assistant still answers in your language.

LU_parcel_search

Find Luxembourg cadastral parcels (ACT Plan Cadastral Numérisé) by id, lieu-dit and number, or location, with each parcel's whole record. query takes a parcel id ('054A00242005293'), a lieu-dit (locality name on the plan) with a parcel number ('Kirchberg 242/5293'), a lieu-dit alone (lists its parcels, paged with offset), or coordinates as 'latitude, longitude' (e.g. 49.6116, 6.1319). With coordinates it returns parcels containing the point (distance 0), then the nearest within `radius` metres, closest first. Each parcel has id, commune, section, number, lieudit, nature, natureLabel, natureCategory, mapArea (m²) and bbox. Set include_geometry for each boundary as GeoJSON (keep limit small). Use LU_parcel_image to see a parcel and its neighbours.

query*string: Parcel id (054A00242005293), 'lieu-dit 242/5293', a lieu-dit, or 'latitude, longitude'
radiusnumber: Search radius in metres around coordinates(default 25)
limitinteger: Maximum results(default 20)
offsetinteger: Skip this many matches of a number or name search, to page through them(default 0)
include_geometryboolean: Include each boundary as a GeoJSON MultiPolygon(default false)

LU_parcel_image

A map image centred on a Luxembourg parcel (id, its ID_PARCELL) or a point (query), with every parcel in view outlined and labelled with its number, so you can see which parcel is where. The parcel passed as id is drawn in red with a larger label; a query point is a red dot. Returns the parcels in view as JSON (label, id, number, section, lieudit; labelled: false where its label didn't fit), then one JPEG per basemap. Basemaps: satellite (Esri World Imagery, often a few years old), hybrid (the same imagery with road and place names), streets and topo (Esri's street and topographic maps). Pass several to compare, e.g. ['satellite', 'streets'] to match buildings with street names. Parcel outlines are yellow on imagery and magenta on maps. Imagery is not always aligned with the cadastre: offsets of a few metres are possible. A scale bar is at bottom left. Labels are left off where they'd overlap; call again with a smaller radius to read them. Each image costs about as much context as 1,000 words, so ask for what you need.

idstring: Parcel id (054A00242005293), drawn in red
querystring: 'latitude, longitude' to centre on instead of a parcel
radiusnumber: Metres from the centre to the image edge. Default: fits the parcel with a margin, or 80 m around a point
basemapsarray: One image per basemap(default ["satellite"])
sizeinteger: Image width and height in pixels(default 768)

Try asking

Which parcel is at 49.6116, 6.1319? What is its nature?
Look up parcel 054A00242005293.
List the parcels in the lieu-dit Kirchberg.

About the data

All ~717k parcels. A parcel's number is primary/secondary (242/5293); its id packs commune, section and numbers.
nature is the ACT's parcel nature code, with its French label and category.
No owners, rights or prices; no registered area (mapArea is the outline's).