# HALOWERK Nordic Land – Drainage Tendency

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

Returns a relative runoff/drainage tendency index for a coordinate in Norway, derived from terrain slope and surface ruggedness.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-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-nordic-land-drainage-tendency-cca2fa0a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PU6jGTC6zEuYN_Q_FFYAh

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-nordic-land-drainage-tendency-cca2fa0a -d '<json body>'
```

Example prompt: What's the relative drainage and runoff tendency for the terrain at latitude 59.9 and longitude 10.7 in Norway — I need to know how well the slope and ruggedness allow water to drain there.

## When to prefer this

Choose this endpoint when you need a terrain-derived, slope-and-ruggedness-based drainage tendency score specifically for Norwegian coordinates. It is well-suited for hydrological screening, site assessments, or environmental analyses where a quick, per-point runoff tendency index is needed without running a full hydrological model. It complements sibling endpoints on the same platform (soil texture, organic carbon, land cover) for comprehensive land characterisation in Norway.

## Known failure modes

- Coordinate outside Norway's Natural Earth boundary — rejected with an out-of-bounds error, no charge applied
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon −31.5–40.5) — schema validation error
- Missing latitude or longitude field — request rejected with a 422 or 400 error
- Service unavailable or upstream terrain data error — 5xx response

## How this service works

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

## Output

A numeric drainage tendency index for the queried Norwegian coordinate, derived from local slope steepness and surface ruggedness, indicating the relative propensity for surface water runoff at that location. Coordinates outside Norway's Natural Earth boundary are rejected before any charge is incurred.

## 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-nordic-land-drainage-tendency-cca2fa0a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)