# HALOWERK Central Land – Czechia Grassland Share

> HALOWERK Central Land – Czechia Grassland 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 grassland for a given coordinate within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-grassland-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-czechia-grassland-share-c4e4f7d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l0U4dj-oxKzYA9n73aVmJ

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-grassland-share-c4e4f7d9 -d '<json body>'
```

Example prompt: What share of the land around latitude 49.74, longitude 16.61 in Czechia is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you need a precise, pixel-level grassland land cover fraction from the authoritative ESA WorldCover 2021 dataset for a specific point in Czechia. It is ideal for environmental assessments, agricultural land audits, ecological studies, or carbon accounting workflows that require validated geospatial land cover data scoped to Czech territory.

## Known failure modes

- Coordinate outside Czechia boundary — rejected before payment, no charge incurred
- Latitude or longitude outside published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing coordinate fields — schema validation error
- Coordinate in Czechia but in an area with no WorldCover coverage — may return null or zero share
- Service unavailability or upstream data error — HTTP 5xx response

## How this service works

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

## Output

A numeric value representing the fraction (share) of ESA WorldCover 2021 pixels around the queried coordinate that are classified as grassland, for a location validated to fall within Czechia'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-central-land-czechia-grassland-share-c4e4f7d9/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)