# HALOWERK Eastern Land – Romania Drainage Tendency

> HALOWERK Eastern Land – Romania Drainage Tendency is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns a relative runoff tendency score derived from terrain slope and ruggedness for a given coordinate within Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-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-eastern-land-romania-drainage-tendency-61222bc0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y5FxSu0XHyktPF1F9V76A

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-eastern-land-romania-drainage-tendency-61222bc0 -d '<json body>'
```

Example prompt: What's the relative runoff tendency for the site at latitude 45.72, longitude 24.85 in Romania — I need to know how prone it is to surface drainage based on slope and ruggedness.

## When to prefer this

Choose this endpoint when you need terrain-based relative drainage or runoff tendency specifically for a point within Romania, derived from slope and ruggedness data. It is ideal for land evaluation, agricultural suitability, construction planning, or environmental risk workflows where topographic drainage propensity matters. It is not appropriate for locations outside Romania or for soil moisture, flood modelling from precipitation, or stream-flow data.

## Known failure modes

- Coordinate outside Romania boundary: rejected before payment, returns validation error
- Coordinate within European coverage bounds but outside Romania: boundary check fails
- Latitude or longitude out of the declared European range (34–72.5, -31.5–40.5): schema validation error
- Missing latitude or longitude in request body: returns 400 bad request
- Payment failure via x402 protocol: request not processed

## How this service works

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

## Output

A numeric relative runoff tendency value derived from the terrain's slope and ruggedness at the queried coordinate. Coordinates outside Romania's Natural Earth boundary are rejected before processing; valid responses reflect the drainage propensity of the local topography.

## 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-eastern-land-romania-drainage-tendency-61222bc0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)