# HALOWERK Central Land – Czechia Surface Elevation

> HALOWERK Central Land – Czechia 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 2026-09-13).

Returns bilinear-interpolated surface elevation (metres) from the Copernicus DEM GLO-30 dataset for a coordinate within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-elevation
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-czechia-surface-elevation-2a9b481a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NmRdOm_cIWxKRFOTHy2I5

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-czechia-surface-elevation-2a9b481a -d '<json body>'
```

Example prompt: What's the surface elevation at latitude 50.0880 and longitude 14.4208 in Czechia? I need the Copernicus DEM GLO-30 height in metres for that point.

## When to prefer this

Choose this endpoint when you need a single-point surface elevation from the high-resolution Copernicus GLO-30 DEM specifically within Czechia. It is ideal for geospatial enrichment pipelines, terrain analysis, routing, and land-use applications where validated Czech-territory coverage and bilinear interpolation quality matter. Prefer it over generic global elevation APIs when boundary validation and pay-per-call micro-pricing with x402 are acceptable.

## Known failure modes

- Coordinate outside Czechia boundary → rejected before payment with a boundary validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon −31.5–40.5) → schema validation error
- Malformed or missing latitude/longitude fields → 400 Bad Request
- Payment failure → 402 Payment Required with x402 challenge
- Service unavailable or DEM data source error → 5xx response

## How this service works

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

## Output

A bilinear-interpolated surface elevation value in metres derived from the Copernicus DEM GLO-30 raster for the requested coordinate. The coordinate is validated against the Natural Earth boundary for Czechia; requests falling outside that boundary are rejected before any payment is processed.

## 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-czechia-surface-elevation-2a9b481a/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)