# HALOWERK Central Land – Depression Depth (Liechtenstein)

> HALOWERK Central Land – Depression Depth (Liechtenstein) is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the positive elevation difference between the neighborhood mean and the center point elevation, indicating how deeply a location sits below its surroundings, for coordinates within Liechtenstein.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/li-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-central-land-depression-depth-liechtenstein-1f8d46c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OzDELvEzcV7Oiwyu82SX5

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-central-land-depression-depth-liechtenstein-1f8d46c6 -d '<json body>'
```

Example prompt: What is the depression depth at latitude 47.14 and longitude 9.52 in Liechtenstein — specifically how many meters below the surrounding neighborhood mean is that point?

## When to prefer this

Choose this endpoint when you need a precise, sub-national terrain depression metric for a specific point within Liechtenstein, backed by Copernicus DEM GLO-30 data. It is ideal for flood risk screening, site assessment, or ecological analysis where knowing how far below surrounding terrain a point sits is critical. Prefer it over generic elevation APIs when the depression-depth (neighborhood mean minus center) calculation is needed rather than raw elevation alone.

## Known failure modes

- Coordinates outside Liechtenstein's Natural Earth boundary are rejected with a validation error before payment is charged
- Coordinates outside the general European coverage bounds (lat 34–72.5, lon -31.5–40.5) are rejected
- Network or upstream DEM data unavailability may return a service error
- Coordinates on flat terrain may return zero or a very small value, which is a valid result not an error

## How this service works

Positive difference between the neighborhood mean and center elevation. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.

## Output

A numeric value in meters representing the positive difference between the mean elevation of the surrounding neighborhood grid and the center point elevation, indicating the depth of any topographic depression at the queried location. Returns zero or near-zero if the point is not in a depression. Coordinates outside the Liechtenstein Natural Earth boundary are rejected before processing.

## 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-central-land-depression-depth-liechtenstein-1f8d46c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)