# HALOWERK Central Land – Slovenia Surface Elevation

> HALOWERK Central Land – Slovenia Surface Elevation is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns bilinear-interpolated surface elevation (metres) from Copernicus DEM GLO-30 for a WGS84 coordinate within Slovenia's boundary.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/si-elevation
- 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-central-land-slovenia-surface-elevation-a4d0c474
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QEsjFEiTPmCJeDVOk5rR-

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-central-land-slovenia-surface-elevation-a4d0c474 -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 46.0569, longitude 14.5058 in Slovenia according to the Copernicus DEM GLO-30?

## When to prefer this

Choose this endpoint when you need high-quality, 30-metre resolution Copernicus DEM surface elevation for a specific point inside Slovenia. Prefer it over generic elevation APIs when GLO-30 provenance matters, when you need Slovenia-specific boundary validation, or when working within a broader HALOWERK Central Land geospatial pipeline for Slovenian territory.

## Known failure modes

- Coordinate outside Slovenia boundary: request rejected with an error before payment is processed
- Coordinate within European coverage range but not Slovenia: rejected by Natural Earth boundary validation
- Malformed or out-of-range latitude/longitude values: schema validation error
- Service unavailable: upstream DEM data unreachable

## How this service works

Bilinear surface elevation from Copernicus DEM GLO-30. The coordinate is validated against the Natural Earth boundary for Slovenia; results outside it are rejected before payment.

## Output

A numeric surface elevation value in metres derived from bilinear interpolation of the Copernicus DEM GLO-30 grid at the requested coordinate. Coordinates outside Slovenia'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-central-land-slovenia-surface-elevation-a4d0c474/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)