# HALOWERK Atlantic Land – Luxembourg Grassland Share

> HALOWERK Atlantic Land – Luxembourg Grassland Share is a paid API for AI agents from atlantikland.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 Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-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-atlantic-land-luxembourg-grassland-share-cec5854a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7LertUj3bIJuc-yYOcKNi

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-atlantic-land-luxembourg-grassland-share-cec5854a -d '<json body>'
```

Example prompt: What share of ESA WorldCover 2021 pixels is classified as grassland at latitude 49.6116, longitude 6.1319 in Luxembourg?

## When to prefer this

Use this endpoint when you need a precise grassland land cover fraction for a specific point in Luxembourg derived from ESA WorldCover 2021 satellite data. It is ideal for environmental assessments, agricultural land analysis, site selection, or regulatory compliance workflows scoped to Luxembourg. Prefer it over general geospatial APIs when you specifically need WorldCover 2021 grassland classification and want boundary-validated, pay-per-query access with no subscription overhead.

## Known failure modes

- Coordinate outside Luxembourg boundary — rejected before payment with a validation error
- Latitude or longitude outside the European coverage range (34–72.5°N, -31.5–40.5°E) — schema validation failure
- Malformed request body — missing required latitude or longitude fields
- Payment failure — x402 payment not completed or insufficient USDC balance

## How this service works

Share of ESA WorldCover 2021 pixels classified as grassland. The coordinate is validated against the Natural Earth boundary for Luxembourg; 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 grid centered on the provided Luxembourg coordinate. Returns an error if the coordinate falls outside Luxembourg'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-atlantic-land-luxembourg-grassland-share-cec5854a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)