# HALOWERK Central Land – Slovenia Drainage Tendency

> HALOWERK Central Land – Slovenia 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 2026-09-15).

Returns relative runoff tendency for a WGS84 coordinate in Slovenia, derived from terrain slope and surface ruggedness.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/si-drainage-tendency
- 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-slovenia-drainage-tendency-98a5eb14
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pnrvpujr0qPmEqpk_N6TI

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-slovenia-drainage-tendency-98a5eb14 -d '<json body>'
```

Example prompt: What's the relative drainage tendency at latitude 46.05, longitude 14.51 in Slovenia — I need the slope and ruggedness-based runoff score for that point.

## When to prefer this

Choose this endpoint when you need terrain-derived hydrological metrics (slope and ruggedness-based runoff tendency) specifically for points within Slovenia, and you want automatic boundary validation to prevent charges on out-of-scope coordinates. Prefer this over generic DEM or slope endpoints when the drainage/runoff interpretation is the primary deliverable rather than raw elevation.

## Known failure modes

- Coordinate outside Slovenia boundary — request rejected with an error before payment is processed
- Latitude or longitude outside the European coverage range (34–72.5 N, -31.5–40.5 E) — validation error
- Malformed or missing coordinate fields — schema validation error
- Service unavailability — HTTP 5xx response

## How this service works

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

## Output

A numeric relative runoff tendency value derived from slope steepness and surface ruggedness at the queried point, covering only coordinates validated within Slovenia's Natural Earth boundary. Requests outside Slovenia 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-slovenia-drainage-tendency-98a5eb14/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)