# HALOWERK Central Land – Liechtenstein Drainage Tendency

> HALOWERK Central Land – Liechtenstein Drainage Tendency 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).

Returns the relative runoff/drainage tendency for a geographic coordinate within Liechtenstein, derived from terrain slope and ruggedness metrics.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/li-drainage-tendency
- 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-liechtenstein-drainage-tendency-41158ac5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rRXF1xsEeo723Qo1a3NQD

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-liechtenstein-drainage-tendency-41158ac5 -d '<json body>'
```

Example prompt: What's the relative drainage tendency for the coordinates 47.14 latitude, 9.52 longitude in Liechtenstein — I need to know how likely surface runoff is based on the slope and terrain ruggedness there.

## When to prefer this

Choose this endpoint when you need a terrain-derived, slope-and-ruggedness-based drainage tendency score specifically for a coordinate within Liechtenstein. It is purpose-built for Liechtenstein with boundary validation and is ideal for hydrological site assessment, land use analysis, or environmental characterization within that country. Prefer it over generic elevation or slope APIs when the output must be a runoff tendency index rather than raw terrain metrics.

## Known failure modes

- Coordinate outside Liechtenstein's Natural Earth boundary — request rejected before payment
- Latitude or longitude outside the European coverage envelope (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing coordinate fields — schema validation error
- Network or service timeout — retry recommended

## How this service works

Relative runoff tendency derived from slope and ruggedness. The coordinate is validated against the Natural Earth boundary for Liechtenstein; results outside it are rejected before payment.

## Output

A numeric relative drainage/runoff tendency value derived from the terrain slope and ruggedness at the specified coordinate, valid only for points within Liechtenstein's Natural Earth boundary; coordinates outside that 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-central-land-liechtenstein-drainage-tendency-41158ac5/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)