# HALOWERK Atlantic Land – Belgium Built-Up Share

> HALOWERK Atlantic Land – Belgium Built-Up 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 land for a given WGS84 coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-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-belgium-built-up-share-dc3d39e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x1FoGp8ZzZssxuOPjIf51

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-belgium-built-up-share-dc3d39e1 -d '<json body>'
```

Example prompt: What share of the land at latitude 50.8503, longitude 4.3517 in Belgium is classified as built-up according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you need ESA WorldCover 2021 built-up land cover share specifically for a point location within Belgium, particularly for land use assessment, urban density analysis, site suitability screening, or environmental baseline reporting. It is purpose-built for Belgian coordinates with pre-payment boundary validation, making it cost-efficient compared to generic global land cover APIs. Prefer it over general geospatial APIs when the coordinate is confirmed to be within Belgium and you need pixel-level ESA classification data rather than administrative or cadastral land use records.

## Known failure modes

- Coordinate outside Belgium's Natural Earth boundary — request rejected before payment, returns validation error
- Latitude or longitude outside published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Missing required latitude or longitude parameter — request rejected with input error
- Network timeout or upstream data service unavailability — may return 5xx error

## How this service works

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

## Output

A numeric value representing the share (proportion or percentage) of ESA WorldCover 2021 pixels classified as built-up land within the analysis grid centered on the provided coordinate. Coordinates outside Belgium's Natural Earth boundary are rejected before any payment is charged.

## 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-belgium-built-up-share-dc3d39e1/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)