# HALOWERK Nordic Land – Norway Built-Up Land Share

> HALOWERK Nordic Land – Norway Built-Up Land 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 built-up (urban/developed) for a given coordinate within Norway's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-built-up-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-built-up-land-share-ecea50f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bOxAhztzg9iqLxm2bcSTa

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-built-up-land-share-ecea50f1 -d '<json body>'
```

Example prompt: What share of ESA WorldCover 2021 pixels are classified as built-up at latitude 59.91 and longitude 10.75 in Norway?

## When to prefer this

Choose this endpoint when you need pixel-level built-up land share data specifically for Norway, sourced from the authoritative ESA WorldCover 2021 dataset, and you want boundary pre-validation to avoid paying for out-of-scope queries. It is ideal for geospatial enrichment pipelines, urban analytics, site assessment, and land use classification tasks focused on Norwegian territory.

## Known failure modes

- Coordinate outside Norway's Natural Earth boundary — request rejected before payment with a validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Invalid or missing coordinate values — input validation error
- No WorldCover data available for the specific pixel — null or zero result
- Network timeout or service unavailability — HTTP 5xx error

## How this service works

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

## Output

A numeric share (proportion between 0 and 1, or percentage) of ESA WorldCover 2021 pixels at the queried coordinate that are classified as built-up land. The coordinate is first validated against Norway's Natural Earth boundary; requests outside Norway are rejected before any payment is charged.

## 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-built-up-land-share-ecea50f1/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)