# HALOWERK Nordic Land – Finland Drainage Tendency

> HALOWERK Nordic Land – Finland 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 2026-09-15).

Returns a relative runoff tendency score for a WGS84 coordinate in Finland, derived from terrain slope and surface ruggedness, with boundary validation against Finland's Natural Earth polygon.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/fi-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-nordic-land-finland-drainage-tendency-f2517702
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fglvAQb0GixTv7kgWZkj_

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-finland-drainage-tendency-f2517702 -d '<json body>'
```

Example prompt: What's the relative drainage tendency at latitude 61.4978, longitude 23.7610 in Finland — I need to know how well water runs off that terrain based on slope and ruggedness.

## When to prefer this

Choose this endpoint when you need a terrain-based hydrological drainage tendency specifically for a point location in Finland, particularly when you want a fast, per-coordinate score derived from slope and ruggedness rather than soil texture or land cover. It is preferable over generic DEM tools when you need boundary-validated, pay-per-call granularity and when Finland is your region of interest. For soil texture, pH, or organic carbon data, use the sibling SoilGrids endpoints on the same provider.

## Known failure modes

- Coordinate outside Finland's Natural Earth boundary — request rejected with a boundary validation error, no charge applied
- Latitude or longitude outside the declared European coverage bounds (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing latitude or longitude parameter — request rejected with a missing-field error
- Payment failure (x402) — request not processed
- Internal computation error if elevation data is unavailable for the queried tile

## How this service works

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

## Output

A numerical relative runoff tendency value for the queried Finnish coordinate, computed from local terrain slope and surface ruggedness. Coordinates outside Finland's Natural Earth 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-nordic-land-finland-drainage-tendency-f2517702/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)