# HALOWERK Southern Land – Spain Grassland Share

> HALOWERK Southern Land – Spain Grassland Share is a paid API for AI agents from suedland.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 Spain.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/es-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-southern-land-spain-grassland-share-dcb48896
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gbnTjMxJbovBFS38IPoQT

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-southern-land-spain-grassland-share-dcb48896 -d '<json body>'
```

Example prompt: What share of the land around 40.4168° N, 3.7038° W in Spain is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you need grassland land cover fraction specifically within Spain using ESA WorldCover 2021 data. Prefer it over generic land cover APIs when you need a focused, per-pixel grassland share with Spain boundary validation built in and a low per-call cost. It is part of a suite of sibling endpoints for other land cover classes (e.g. cropland) and soil properties, so combine them for richer site assessments.

## Known failure modes

- Coordinate outside Spain's Natural Earth boundary — request rejected before payment
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing coordinate fields — schema validation failure
- Coordinate in Spain but at sea or in a non-terrestrial area — may return zero grassland share

## How this service works

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

## Output

A numeric value representing the fraction (share) of ESA WorldCover 2021 pixels in the analysis area around the given coordinate that are classified as grassland, validated to fall within Spain'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-southern-land-spain-grassland-share-dcb48896/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)