# HALOWERK Atlantic Land – Belgium Grassland Share

> HALOWERK Atlantic Land – Belgium 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 2026-09-13).

Returns the share of ESA WorldCover 2021 pixels classified as grassland for a given coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-grassland-share
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-belgium-grassland-share-97f2f1aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a3UKgbU1oqMlQmMsywcR-

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-belgium-grassland-share-97f2f1aa -d '<json body>'
```

Example prompt: What share of the land around latitude 50.85 and longitude 3.72 in Belgium is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you need ESA WorldCover 2021–derived grassland land cover share for a specific point location within Belgium. It is purpose-built for Belgian coordinates with boundary validation, making it more reliable than generic global land cover APIs for this region. Prefer this over manual raster queries or general-purpose geospatial APIs when you need a fast, pay-per-call lookup specifically for Belgium.

## Known failure modes

- Coordinate outside Belgium boundary: rejected before payment, returns validation error
- Coordinate outside valid European coverage range (lat 34–72.5, lon -31.5–40.5): rejected with bounds error
- Malformed or missing latitude/longitude fields: returns schema validation error
- Temporary service unavailability: returns HTTP 5xx error

## How this service works

Share of ESA WorldCover 2021 pixels classified as grassland. The coordinate is validated against the Natural Earth boundary for Belgium; 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 surrounding the provided Belgian coordinate. The coordinate is validated against the Natural Earth boundary for Belgium before the result is returned; coordinates outside Belgium are rejected.

## 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-belgium-grassland-share-97f2f1aa/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)