# HALOWERK Europe Land – Cropland Share (Polygon)

> HALOWERK Europe Land – Cropland Share (Polygon) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the share of ESA WorldCover 2021 pixels classified as cropland within a user-supplied WGS84 polygon, covering 30 European countries.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-cropland-share-parcel
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-cropland-share-polygon-63d623cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wDPPSX7a8ZNw0i17L3RLc

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-europe-land-cropland-share-polygon-63d623cb -d '<json body>'
```

Example prompt: What fraction of this parcel is cropland? The polygon vertices are [[-0.5, 51.3], [-0.5, 51.32], [-0.48, 51.32], [-0.48, 51.3]] — use the ESA WorldCover 2021 data from HALOWERK's Europe Land service.

## When to prefer this

Choose this endpoint when you need cropland land-cover fraction for an arbitrary user-defined polygon boundary (parcel, field, or custom area) in Europe, rather than a fixed circular buffer. Use it for due diligence, compliance checks, or site analysis where exact parcel geometry matters. Prefer sibling circular-buffer endpoints when only a radius from a point is available.

## Known failure modes

- Polygon spans more than 0.25 degrees — request rejected with validation error
- Polygon has fewer than 3 coordinate pairs — invalid geometry error
- Coordinates fall outside the covered European bounding box (lat 34–72.5, lon -31.5–40.5) — out-of-coverage error
- Malformed coordinate array or wrong nesting — schema validation failure
- Payment not provided or insufficient — HTTP 402 response

## How this service works

Share of ESA WorldCover 2021 pixels classified as cropland. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.

## Output

A standardized numeric value (fraction or percentage) representing the share of ESA WorldCover 2021 pixels within the supplied polygon that are classified as cropland, consistent across all 30 covered European countries.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "polygon": {
   "type": "array",
   "items": {
    "type": "array",
    "items": [
     {
      "type": "number",
      "maximum": 40.5,
      "minimum": -31.5
     },
     {
      "type": "number",
      "maximum": 72.5,
      "minimum": 34
     }
    ],
    "maxItems": 2,
    "minItems": 2,
    "additionalItems": false
   },
   "maxItems": 100,
   "minItems": 3,
   "description": "WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-europe-land-cropland-share-polygon-63d623cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)