# HALOWERK Nordic Land – Finland Grassland Share

> HALOWERK Nordic Land – Finland 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 Finland.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/fi-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-finland-grassland-share-040f6186
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v5Iy3IrT5vfJZzwCDzD6r

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-finland-grassland-share-040f6186 -d '<json body>'
```

Example prompt: What fraction of the land around latitude 61.5 longitude 25.7 in Finland is classified as grassland according to ESA WorldCover data?

## When to prefer this

Choose this endpoint when you specifically need ESA WorldCover 2021 grassland land-cover fractions for a point within Finland. It is ideal for ecological analysis, agricultural suitability studies, carbon accounting, or any workflow requiring validated grassland coverage data anchored to Finland's official boundary. Prefer it over generic land-cover APIs when you need the coordinate boundary pre-validated against Finland and a low per-call cost via x402 micropayment.

## Known failure modes

- Coordinate outside Finland boundary — rejected before payment with a validation error
- Coordinate within European coverage bounds but outside Finland — boundary check fails
- Latitude or longitude outside the published European coverage window (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Network or service unavailability returning a 5xx error
- Malformed request body missing required fields

## How this service works

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

## Output

A numeric share (fraction or percentage) indicating what proportion of ESA WorldCover 2021 pixels in the analysis area around the given Finnish coordinate are classified as grassland. The coordinate is validated against the Natural Earth boundary for Finland; coordinates outside Finland are rejected before payment is processed.

## 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-finland-grassland-share-040f6186/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)