# HALOWERK Atlantic Land – Luxembourg Built-Up Land Share

> HALOWERK Atlantic Land – Luxembourg Built-Up Land Share is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the share of ESA WorldCover 2021 pixels classified as built-up for a given coordinate within Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-built-up-share
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-luxembourg-built-up-land-share-aec5af84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2V5fhNY-UTsQAETd-Lxnv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-atlantic-land-luxembourg-built-up-land-share-aec5af84 -d '<json body>'
```

Example prompt: What share of ESA WorldCover 2021 pixels around latitude 49.6116, longitude 6.1319 in Luxembourg are classified as built-up?

## When to prefer this

Choose this endpoint when you need satellite-derived, standardized built-up land cover data for a specific point in Luxembourg, particularly when integrating ESA WorldCover 2021 classifications into geospatial, real estate, urban planning, or environmental workflows. It is ideal for Luxembourg-scoped analyses requiring a low-cost, per-call lookup with automated boundary validation.

## Known failure modes

- Coordinate outside Luxembourg's Natural Earth boundary — request rejected before payment
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing latitude/longitude fields — schema validation error
- Payment failure via x402 protocol — call not processed

## How this service works

Share of ESA WorldCover 2021 pixels classified as built-up. The coordinate is validated against the Natural Earth boundary for Luxembourg; results outside it are rejected before payment.

## Output

A numeric value representing the share (proportion or percentage) of ESA WorldCover 2021 pixels in the analysis grid around the given coordinate that are classified as built-up, limited to coordinates validated as lying within Luxembourg's Natural Earth boundary.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-atlantic-land-luxembourg-built-up-land-share-aec5af84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)