# HALOWERK Central Land – CZ Water & Wetland Share

> HALOWERK Central Land – CZ Water & Wetland 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 combined fractional share of permanent water, herbaceous wetland, and mangrove land-cover classes for a coordinate in Czechia, derived from ESA WorldCover 2021.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-water-wetland-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-cz-water-wetland-share-1a9312f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_18Z0aDRihg1sI11m39KFs

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-cz-water-wetland-share-1a9312f0 -d '<json body>'
```

Example prompt: What's the combined share of permanent water, wetland, and mangrove land cover at latitude 49.19, longitude 16.61 in Czechia? I need the ESA WorldCover fraction for that point.

## When to prefer this

Choose this endpoint when you need a precise, pixel-level ESA WorldCover 2021 water and wetland fractional share for a specific point location within Czechia. It is ideal for environmental assessments, land-use analysis, flood-risk characterization, or site suitability studies where the combined hydrological land-cover fraction (permanent water + herbaceous wetland + mangrove) is the key metric. Prefer it over generic GIS tools when you need a low-cost, per-call API with built-in boundary validation for the Czech Republic.

## Known failure modes

- Coordinate outside Czechia boundary: request rejected before payment with a validation error
- Latitude or longitude outside European coverage range (34–72.5°N, -31.5–40.5°E): schema validation error
- Missing required latitude or longitude parameters: 400-level error
- Upstream ESA WorldCover data unavailable for the requested pixel: may return null or error response
- Payment failure via x402 protocol: request not processed

## How this service works

Combined share of permanent water, herbaceous wetland and mangrove classes. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

## Output

A numeric fractional value (0–1 or percentage) representing the combined share of ESA WorldCover 2021 pixels classified as permanent water, herbaceous wetland, or mangrove within the analysis grid around the given coordinate. Coordinates outside Czechia's Natural Earth boundary are rejected before any computation or 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-cz-water-wetland-share-1a9312f0/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)