# HALOWERK Central Land – Austria Built-Up Share

> HALOWERK Central Land – Austria Built-Up Share is a paid API for AI agents from mitteleuropa.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 cover for a given WGS84 coordinate within Austria.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-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-central-land-austria-built-up-share-0288217c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aNGWQzcNj0KgSyOq7t7OB

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-central-land-austria-built-up-share-0288217c -d '<json body>'
```

Example prompt: What fraction of the land around latitude 48.2, longitude 16.37 in Austria is classified as built-up according to ESA WorldCover?

## When to prefer this

Choose this endpoint when you need a precise, satellite-derived built-up land share specifically for a coordinate within Austria, validated against official boundaries. Prefer it over generic geocoding or zoning APIs when you need ESA WorldCover 2021-sourced land cover fractions for geospatial analysis, site assessment, or urban studies in Austria. It is especially useful when combining with sibling endpoints (elevation, grassland share, soil data) from the same HALOWERK Central Land platform for multi-variable land characterization.

## Known failure modes

- Coordinate outside Austria's Natural Earth boundary — request rejected with validation error before payment
- Coordinate outside the broader European coverage range (lat 34–72.5, lon -31.5–40.5) — input rejected
- Malformed or missing latitude/longitude fields — schema validation error
- Ambiguous or noisy land cover in sparse-data areas — may return low-confidence values

## How this service works

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

## Output

A numeric fraction or percentage representing the share of ESA WorldCover 2021 pixels in the analysis area around the given coordinate that are classified as built-up. Coordinates outside Austria'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-central-land-austria-built-up-share-0288217c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)