# HALOWERK Central Land – Slovakia Grassland Share

> HALOWERK Central Land – Slovakia 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 Slovakia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-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-slovakia-grassland-share-bc7e207d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8ePHdckRX5lZmPiN88nAs

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-slovakia-grassland-share-bc7e207d -d '<json body>'
```

Example prompt: What share of the area around coordinates 48.7° N, 19.5° E in Slovakia is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you need grassland-specific land cover fractions (not just the dominant class) for a point coordinate in Slovakia, derived from the authoritative ESA WorldCover 2021 dataset. Prefer it over generic land cover endpoints when the user specifically needs grassland share, and over sibling endpoints on this service that return cropland share, tree cover share, or dominant class instead.

## Known failure modes

- Coordinate outside Slovakia's Natural Earth boundary — request is rejected before payment is processed
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error returned
- Malformed or missing coordinate parameters — input schema validation error
- Service unavailable or upstream ESA WorldCover data issue — server-side error

## How this service works

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

## Output

A numeric value representing the fraction (share) of ESA WorldCover 2021 pixels in the analysis area that are classified as grassland, scoped to a validated coordinate within Slovakia'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-slovakia-grassland-share-bc7e207d/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)