# HALOWERK Nordic Land – Denmark Solar Orientation Index

> HALOWERK Nordic Land – Denmark Solar Orientation Index 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 a south-facing slope orientation index derived from aspect and slope for a given coordinate within Denmark.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-solar-orientation
- 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-denmark-solar-orientation-index-999aa8ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_69il7gwViKj9bzoPjqBtU

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-denmark-solar-orientation-index-999aa8ed -d '<json body>'
```

Example prompt: What is the south-facing slope orientation index for the location at latitude 55.67 and longitude 12.57 in Denmark? I want to know how well-oriented the terrain is for solar energy.

## When to prefer this

Choose this endpoint when you need a fast, single-coordinate solar orientation index specifically for locations within Denmark, particularly for solar siting, land assessment, or renewable energy feasibility workflows. It is distinct from general solar irradiance or weather-based solar data — it focuses on terrain aspect and slope geometry. Best used alongside other HALOWERK Nordic Land endpoints (soil, elevation, gradient) for comprehensive land characterization.

## Known failure modes

- Coordinate outside Denmark boundary rejected before payment with validation error
- Latitude or longitude out of published European coverage range returns schema validation error
- Non-finite or missing coordinate values cause request rejection
- Service unavailable or timeout for transient infrastructure issues

## How this service works

South-facing slope orientation index derived from aspect and slope. The coordinate is validated against the Natural Earth boundary for Denmark; results outside it are rejected before payment.

## Output

A numeric south-facing slope orientation index derived from terrain aspect and slope for the queried Danish coordinate, indicating how favorably the land faces south for solar exposure. Coordinates outside Denmark's Natural Earth boundary are rejected before any charge is applied.

## 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-denmark-solar-orientation-index-999aa8ed/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)