# HALOWERK Atlantic Land – Belgium Drainage Tendency

> HALOWERK Atlantic Land – Belgium Drainage Tendency is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the relative runoff tendency (derived from terrain slope and ruggedness) for a given coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-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-atlantic-land-belgium-drainage-tendency-8d7fb74d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V-RCqR4BVA0hTKtnjI0JG

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-atlantic-land-belgium-drainage-tendency-8d7fb74d -d '<json body>'
```

Example prompt: What's the relative runoff tendency for the land at 50.8503° N, 4.3517° E in Belgium — I need to know how prone it is to surface drainage based on slope and terrain ruggedness.

## When to prefer this

Use this endpoint when you need a terrain-derived hydrological runoff indicator specifically for a point within Belgium. It is the right choice for land assessment, agricultural planning, construction site screening, or environmental risk scoring where slope and ruggedness are the primary drainage signals. Prefer it over general GIS APIs when you need a precomputed, pay-per-query result with built-in Belgian boundary validation.

## Known failure modes

- Coordinate falls outside Belgium boundary — request rejected with validation error before payment
- Latitude or longitude out of the declared European coverage range (34–72.5°N, -31.5–40.5°E) — schema validation failure
- Malformed or missing coordinate fields — HTTP 400 bad request
- Service unavailable or upstream terrain data error — HTTP 5xx

## How this service works

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

## Output

A numeric relative runoff tendency value derived from terrain slope and ruggedness for the requested Belgian coordinate, indicating how prone the location is to surface water runoff. Coordinates outside the Belgium boundary are rejected before any payment is processed.

## 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-atlantic-land-belgium-drainage-tendency-8d7fb74d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)