# HALOWERK Nordic Land – Norway Grassland Share

> HALOWERK Nordic Land – Norway Grassland Share is a paid API for AI agents from nordland.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 Norway.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-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-nordic-land-norway-grassland-share-1fc10716
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z8wCqeTgYOCDiDOjAUNb2

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-nordic-land-norway-grassland-share-1fc10716 -d '<json body>'
```

Example prompt: What share of the land around latitude 63.4 and longitude 10.4 in Norway is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you need a specific land cover metric — grassland share — derived from the authoritative ESA WorldCover 2021 dataset for a point location within Norway. It is more precise than generic land cover endpoints because it pre-validates against the Norway boundary, preventing wasted payment on out-of-region queries, and it returns a single focused metric rather than a full land cover breakdown. Prefer this over the sibling dominant-class endpoint when a proportional grassland signal is needed rather than the plurality class.

## Known failure modes

- Coordinate outside Norway boundary: request rejected before payment, returns error indicating point is outside coverage area
- Coordinate outside the broader European bounding box (lat 34–72.5, lon -31.5–40.5): schema validation failure
- Missing or malformed latitude/longitude values: request rejected with validation error
- Network timeout or service unavailability: standard 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 Norway; results outside it are rejected before payment.

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels in the analysis area around the given coordinate that are classified as grassland. Only coordinates within Norway's Natural Earth boundary are accepted.

## 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-nordic-land-norway-grassland-share-1fc10716/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)