# HALOWERK Central Land – Terrain Ruggedness Index (Liechtenstein)

> HALOWERK Central Land – Terrain Ruggedness Index (Liechtenstein) is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Computes the standard deviation of sampled surface elevations around a given coordinate within Liechtenstein, quantifying local terrain ruggedness.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/li-ruggedness
- 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-central-land-terrain-ruggedness-index-liechtenstein-87c2ee41
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Kg1rT2agdjyHJXhLSuPB4

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-terrain-ruggedness-index-liechtenstein-87c2ee41 -d '<json body>'
```

Example prompt: What's the terrain ruggedness at latitude 47.14, longitude 9.52 in Liechtenstein — I need the standard deviation of surface elevations around that point for a land suitability assessment.

## When to prefer this

Choose this endpoint when you need a precise terrain ruggedness metric (elevation standard deviation) for a specific point within Liechtenstein, backed by Copernicus DEM GLO-30 data and with built-in boundary validation. Prefer it over generic elevation APIs when ruggedness (not just raw elevation) is the required output and the location is confirmed to be within Liechtenstein.

## Known failure modes

- Coordinate outside Liechtenstein boundary: request rejected before payment is charged
- Latitude or longitude outside European coverage range (lat 34–72.5, lon -31.5–40.5): validation error
- Invalid or missing coordinate fields: schema validation failure
- Payment not settled via x402 protocol: request not processed

## How this service works

Standard deviation of sampled surface elevations. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.

## Output

Returns the standard deviation of surface elevations sampled within the analysis neighborhood around the given coordinate, expressed as a numeric ruggedness metric. Coordinates outside the Liechtenstein 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-terrain-ruggedness-index-liechtenstein-87c2ee41/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)