# HALOWERK Eastern Land – Romania Solar Orientation Index

> HALOWERK Eastern Land – Romania Solar Orientation Index 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 south-facing slope orientation index for a given coordinate within Romania, derived from terrain aspect and slope data.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-solar-orientation
- 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-solar-orientation-index-7ef6c7aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_30alLh1Hz4Gf3eyF14UlW

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-solar-orientation-index-7ef6c7aa -d '<json body>'
```

Example prompt: What's the south-facing solar orientation index for the location at 45.7489° N, 21.2087° E in Romania? I want to know how suitable the slope is for sun exposure.

## When to prefer this

Choose this endpoint when you need a focused, Romania-specific south-facing slope orientation index at a precise coordinate. It is ideal for solar siting, agricultural land assessment, or real estate evaluation within Romania where terrain aspect and slope are key factors. Its built-in boundary validation ensures you only pay for valid results within the coverage area.

## Known failure modes

- Coordinate outside Romania's Natural Earth boundary — request rejected with boundary validation 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 or malformed latitude/longitude input — request rejected with parameter error
- Service unavailable or internal computation error — HTTP 5xx response

## How this service works

South-facing slope orientation index derived from aspect and slope. The coordinate is validated against the Natural Earth boundary for Romania; results outside it are rejected before payment.

## Output

A numeric index representing the south-facing orientation of the slope at the given coordinate, derived from terrain aspect and slope. Coordinates outside Romania'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-eastern-land-romania-solar-orientation-index-7ef6c7aa/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)