# HALOWERK Atlantic Land – Luxembourg Depression Depth

> HALOWERK Atlantic Land – Luxembourg Depression Depth 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 positive elevation difference between a neighborhood mean and the center point elevation (depression depth) for a given coordinate within Luxembourg.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-depression-depth
- 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-depression-depth-a5d92ade
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MOT5HEK4excyIyAJsCYbp

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-depression-depth-a5d92ade -d '<json body>'
```

Example prompt: What's the depression depth at latitude 49.6116, longitude 6.1319 in Luxembourg — how much lower is that point compared to the surrounding neighborhood elevation?

## When to prefer this

Choose this endpoint when you need a terrain depression metric specifically for a coordinate within Luxembourg, and you want a pre-validated, pay-per-call service with geographic boundary enforcement. It is ideal for land analysis, site assessment, or agricultural applications where understanding local topographic concavity is critical. Prefer this over raw DEM lookups when you want the neighborhood-mean-minus-center computation done server-side.

## Known failure modes

- Coordinate outside Luxembourg 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
- Negative or zero depression (point is elevated relative to neighborhood) — may return zero or be excluded from results
- Network timeout or service unavailability — HTTP 5xx error
- Malformed input (non-numeric coordinates) — HTTP 4xx validation error

## How this service works

Positive difference between the neighborhood mean and center 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 positive difference (in meters) between the mean elevation of the surrounding neighborhood and the center point elevation at the queried coordinate. Coordinates outside the Luxembourg boundary are rejected before any computation or 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-depression-depth-a5d92ade/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)