# HALOWERK Baltic Land – Germany Grassland Share

> HALOWERK Baltic Land – Germany Grassland Share is a paid API for AI agents from baltikum.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 Germany.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-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-baltic-land-germany-grassland-share-e011996e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P1Sjp3Nl1nD8lfM4SddMc

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-baltic-land-germany-grassland-share-e011996e -d '<json body>'
```

Example prompt: What share of the land around coordinates 51.5°N, 10.2°E in Germany is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you need grassland land cover fraction specifically for a point within Germany, backed by the authoritative ESA WorldCover 2021 classification. It is ideal for environmental assessments, agricultural site analysis, habitat mapping, or any workflow requiring a standardized, satellite-derived grassland share at a precise coordinate. Prefer it over generic GIS tools when you need a pay-per-query, low-cost lookup with built-in German boundary validation.

## Known failure modes

- Coordinate outside Germany boundary — request rejected before payment with a boundary validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed or missing coordinate fields — input validation error
- Service unavailable or upstream ESA WorldCover data error — 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 Germany; results outside it are rejected before payment.

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels classified as grassland within the analysis area surrounding the given coordinate. The coordinate is pre-validated against the Germany boundary; requests outside Germany are rejected before any payment is processed.

## 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-baltic-land-germany-grassland-share-e011996e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)