# HALOWERK Baltic Land – Estonia Solar Orientation Index

> HALOWERK Baltic Land – Estonia Solar Orientation Index is a paid API for AI agents from baltikum.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns a south-facing slope orientation index derived from aspect and slope for a given coordinate within Estonia.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/ee-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-baltic-land-estonia-solar-orientation-index-5aa6d21b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0LH8kMojeEiqHbh6ewqPE

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-baltic-land-estonia-solar-orientation-index-5aa6d21b -d '<json body>'
```

Example prompt: What's the south-facing slope orientation index for the land at latitude 58.95, longitude 25.12 in Estonia — I want to know how good the solar aspect is for that parcel?

## When to prefer this

Choose this endpoint when you need a terrain-derived solar orientation metric specifically for Estonian land parcels. It is ideal for renewable energy siting, agricultural exposure analysis, or land valuation workflows where the south-facing aspect of a slope matters. The pre-payment boundary validation for Estonia means you won't be charged for out-of-bounds queries.

## Known failure modes

- Coordinate outside Estonia boundary — request rejected with validation error before payment
- Latitude or longitude outside published European coverage range — input validation error
- Coordinate in flat or data-sparse region — index may return low-confidence or null value
- Malformed JSON input — 400 bad request

## How this service works

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

## Output

A numeric south-facing slope orientation index derived from terrain aspect and slope gradient for the queried coordinate within Estonia. Coordinates outside the Estonian 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-baltic-land-estonia-solar-orientation-index-5aa6d21b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)