# HALOWERK Atlantic Land – Luxembourg Solar Orientation Index

> HALOWERK Atlantic Land – Luxembourg Solar Orientation Index is a paid API for AI agents from atlantikland.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 Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-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-atlantic-land-luxembourg-solar-orientation-index-216d080e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RXI3GWM3CHnsUKwhX20ig

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-atlantic-land-luxembourg-solar-orientation-index-216d080e -d '<json body>'
```

Example prompt: What's the south-facing slope orientation index for the location at latitude 49.6116, longitude 6.1319 in Luxembourg? I need it for a solar panel suitability assessment.

## When to prefer this

Use this endpoint when you need a single-point, fast solar orientation index specifically for Luxembourg coordinates, validated against official Natural Earth boundaries. Prefer it over general slope or aspect tools when you need a precomputed south-facing composite metric without having to fuse raw DEM layers yourself.

## Known failure modes

- Coordinate outside Luxembourg boundary — request rejected before charge with a validation error
- Latitude or longitude out of European coverage bounds (34–72.5°N, -31.5–40.5°E) — schema validation failure
- Malformed or missing coordinate fields — request rejected with a 400-level error
- Payment failure via x402 protocol — call not processed

## How this service works

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

## Output

A numeric south-facing slope orientation index for the queried coordinate, computed from terrain aspect and slope data. Coordinates outside the Luxembourg boundary 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-atlantic-land-luxembourg-solar-orientation-index-216d080e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)