# HALOWERK Atlantic Land – Luxembourg Aspect Direction

> HALOWERK Atlantic Land – Luxembourg Aspect Direction 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 the circular direction (in degrees, clockwise from north) of the dominant surface slope aspect for a given WGS84 coordinate within Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-aspect
- 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-aspect-direction-a8ce53fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4Q6e1-v4a37ECVfeA7Yyj

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-aspect-direction-a8ce53fd -d '<json body>'
```

Example prompt: What direction does the dominant slope face at latitude 49.611, longitude 6.132 in Luxembourg — give me the aspect in degrees clockwise from north.

## When to prefer this

Use this endpoint when you need terrain aspect (slope-facing direction) specifically for a point within Luxembourg, particularly when you want boundary-validated results and per-call micropayment billing via x402 without a subscription. Prefer it over general DEM APIs when Luxembourg-specific validation and pay-per-query pricing matter.

## Known failure modes

- Coordinate outside Luxembourg boundary: rejected with error before payment is charged
- Coordinate within European bounds but outside Luxembourg: validation rejection
- Latitude or longitude out of the published European coverage range: schema validation error
- Flat terrain with no meaningful gradient may return ambiguous or null aspect values
- Network or service timeout

## How this service works

Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Luxembourg; results outside it are rejected before payment.

## Output

A numeric value representing the circular direction (degrees, 0–360, clockwise from north) of the dominant surface slope gradient at the queried point. Coordinates outside the Luxembourg 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-atlantic-land-luxembourg-aspect-direction-a8ce53fd/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)