# HALOWERK Eastern Land – Romania Terrain Aspect

> HALOWERK Eastern Land – Romania Terrain Aspect 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 the circular direction (0–360°, clockwise from north) of the dominant surface gradient for a given coordinate within Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-aspect
- 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-terrain-aspect-d263f23e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ioyXsaSwtHxXm1z9T-tQ8

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-terrain-aspect-d263f23e -d '<json body>'
```

Example prompt: What direction does the terrain face at latitude 45.5, longitude 25.3 in Romania — can you get me the aspect angle clockwise from north?

## When to prefer this

Choose this endpoint when you need terrain aspect (slope-facing direction) specifically for coordinates within Romania, and need boundary pre-validation to avoid wasted charges. It is part of a suite of land-surface analytics endpoints from HALOWERK that cover slope, ruggedness, runoff, soil, and land cover — making it ideal when building multi-variable terrain profiles for Romanian locations.

## Known failure modes

- Coordinate outside Romania's Natural Earth boundary — request rejected before payment, no charge incurred
- Latitude or longitude out of the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Missing required latitude or longitude field — schema validation failure
- Tile data unavailable for the exact coordinate — possible null or error response

## How this service works

Circular direction of the dominant surface gradient, clockwise from north. The coordinate is validated against the Natural Earth boundary for Romania; results outside it are rejected before payment.

## Output

A numeric value representing the circular direction (0–360 degrees, clockwise from north) of the dominant surface gradient at the queried coordinate. Coordinates outside Romania's Natural Earth boundary are rejected before any payment is charged.

## 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-terrain-aspect-d263f23e/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)