# HALOWERK Atlantic Land – Luxembourg Local Relief

> HALOWERK Atlantic Land – Luxembourg Local Relief is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the local relief (difference between maximum and minimum sampled surface elevation) for a given WGS84 coordinate within Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-local-relief
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-luxembourg-local-relief-9e1d1213
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o149-V7D69nBcVQchQNik

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-local-relief-9e1d1213 -d '<json body>'
```

Example prompt: What's the local terrain relief — the difference between the highest and lowest surface elevation — at latitude 49.6116, longitude 6.1319 in Luxembourg?

## When to prefer this

Choose this endpoint when you specifically need local terrain relief (max–min elevation difference) for a point location in Luxembourg, such as for land suitability analysis, hydrological modelling, route planning, or terrain roughness characterization. It is preferable to general DEM APIs when you need a precomputed, Luxembourg-validated relief metric without managing raster data yourself.

## Known failure modes

- Coordinate outside Luxembourg's Natural Earth boundary — request rejected with validation error before payment
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing coordinate fields — request fails with input validation error
- Service unavailable or internal error — HTTP 5xx response

## How this service works

Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Luxembourg; results outside it are rejected before payment.

## Output

A numeric value representing the difference (in meters) between the maximum and minimum sampled surface elevation within the analysis grid centered on the given coordinate inside Luxembourg. 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-local-relief-9e1d1213/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)