# HALOWERK Central Land – Austria Drainage Tendency

> HALOWERK Central Land – Austria 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 tendency for a geographic coordinate in Austria, derived from terrain slope and ruggedness using DEM analysis.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-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-austria-drainage-tendency-f1731f76
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o2g8ZcTBDKoO8eiZYp4ZB

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-austria-drainage-tendency-f1731f76 -d '<json body>'
```

Example prompt: What's the relative drainage tendency at latitude 47.81, longitude 13.05 in Austria — I need to understand how likely surface runoff is at that spot based on slope and terrain ruggedness.

## When to prefer this

Use this endpoint when you need a terrain-derived runoff tendency index specifically for a point within Austria, particularly when combining with other HALOWERK land surface metrics (elevation, slope, soil texture) for multi-factor land analysis. Prefer this over generic elevation lookups when the question is specifically about drainage or runoff potential.

## Known failure modes

- Coordinates outside Austria boundary → request rejected before payment with validation error
- Latitude or longitude outside the European coverage range (lat 34–72.5, lon -31.5–40.5) → schema validation error
- Malformed or missing coordinate fields → 400 bad request
- Service unavailable or DEM data gap → 5xx error with no result

## How this service works

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

## Output

A numeric score representing the relative runoff tendency at the specified coordinate, derived from terrain slope and surface ruggedness. The coordinate is validated against Austria's Natural Earth boundary; points outside Austria are rejected without charge.

## 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-austria-drainage-tendency-f1731f76/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)