# HALOWERK Central Land – Czechia Built-Up Share

> HALOWERK Central Land – Czechia 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 2026-09-13).

Returns the share of ESA WorldCover 2021 pixels classified as built-up (urban/constructed surface) for a given WGS84 coordinate within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-built-up-share
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-czechia-built-up-share-5f4ff9ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V89ARejHhFoTcQKn9CfRW

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-czechia-built-up-share-5f4ff9ff -d '<json body>'
```

Example prompt: What share of the land around latitude 50.08, longitude 14.44 in Prague is classified as built-up according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you specifically need ESA WorldCover 2021-derived built-up land cover fractions for a point location within Czechia. It is ideal for geospatial enrichment pipelines, urban analytics, site assessment, environmental reporting, or any agent workflow requiring satellite-based land cover data at Czech coordinates. Prefer this over general land cover APIs when Czechia boundary validation and micro-payment per-call pricing (x402) fit your architecture.

## Known failure modes

- Coordinate outside Czechia boundary — request rejected with an error before payment is charged
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate fields — schema validation error
- Payment failure via x402 protocol — request not processed
- Temporary service unavailability — 5xx error response

## How this service works

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

## Output

A fractional value (0–1 or percentage) representing the share of ESA WorldCover 2021 satellite pixels in the analysis neighborhood around the supplied coordinate that are classified as built-up/constructed surface. Coordinates outside the Czechia boundary are rejected before processing.

## 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-czechia-built-up-share-5f4ff9ff/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)