# HALOWERK Eastern Land – Hungary Solar Orientation Index

> HALOWERK Eastern Land – Hungary 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 (solar aspect score) for a given coordinate within Hungary, derived from terrain aspect and slope data.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-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-hungary-solar-orientation-index-c6dc662f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6ZwRgl9W8ZldnJl1K3vGt

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-hungary-solar-orientation-index-c6dc662f -d '<json body>'
```

Example prompt: What's the south-facing solar orientation index for the hillside at latitude 47.32, longitude 18.94 in Hungary? I want to know how suitable it is for solar panels.

## When to prefer this

Use this endpoint when you need a quantitative south-facing slope orientation metric specifically for coordinates within Hungary. It is ideal for solar site assessment, agricultural land evaluation, or terrain suitability scoring where the Hungary boundary check is a built-in safeguard. Prefer this over generic elevation or aspect APIs when you need a combined aspect-slope solar index with pre-validated Hungarian coverage.

## Known failure modes

- Coordinate outside Hungary boundary returns rejection error before payment
- Coordinate outside supported European coverage range (lat 34–72.5, lon -31.5–40.5) returns validation error
- Invalid or missing latitude/longitude returns schema validation error
- Coordinate on flat terrain may return near-zero orientation index

## How this service works

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

## Output

A numeric south-facing slope orientation index derived from the terrain's aspect and slope at the given coordinate. Higher values indicate stronger south-facing orientation favorable for solar exposure. Coordinates outside Hungary's 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-hungary-solar-orientation-index-c6dc662f/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)