# HALOWERK Europe Land – Solar Orientation Index (1000m Buffer)

> HALOWERK Europe Land – Solar Orientation Index (1000m Buffer) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns a south-facing slope orientation index for a 1,000-metre circular neighborhood around a given European coordinate, derived from terrain aspect and slope data.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-solar-orientation-buffer-1000m
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-solar-orientation-index-1000m-buffer-8fa14703
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vHDqTZzXw8MFXshxeFAG4

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-europe-land-solar-orientation-index-1000m-buffer-8fa14703 -d '<json body>'
```

Example prompt: What's the south-facing slope orientation index for the location at latitude 47.3, longitude 11.2 in Austria? I need the 1,000-metre neighborhood solar orientation score.

## When to prefer this

Use this endpoint when you need a quantified, standardized measure of south-facing slope orientation for a specific point in Europe, particularly for solar energy site assessment, agricultural suitability analysis, or land use planning. Prefer this 1,000-metre buffer variant over the 60-metre variant when you want a broader landscape-level orientation context rather than a hyper-local slope reading.

## Known failure modes

- Coordinates outside the European coverage bounding box (lat 34–72.5, lon -31.5–40.5) will return an error
- Missing or malformed latitude/longitude values cause validation errors
- Coastal or offshore coordinates may fall outside land coverage
- Payment failure via x402 protocol results in an authorization error

## How this service works

South-facing slope orientation index derived from aspect and slope. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized south-facing slope orientation index value derived from aspect and slope data within a 1,000-metre circular buffer around the supplied coordinate. The score is comparable across all 30 covered European countries and indicates how strongly the terrain faces south, with higher values indicating better solar exposure orientation.

## 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-europe-land-solar-orientation-index-1000m-buffer-8fa14703/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)