# HALOWERK Baltic Land – Surface Elevation (Germany)

> HALOWERK Baltic Land – Surface Elevation (Germany) 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 bilinear-interpolated surface elevation in metres for a WGS84 coordinate within Germany, derived from Copernicus DEM GLO-30, with boundary validation rejecting points outside Germany.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-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-baltic-land-surface-elevation-germany-dd3d2a89
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jsL9WNMtT72XdV15EQ15E

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-surface-elevation-germany-dd3d2a89 -d '<json body>'
```

Example prompt: What is the surface elevation at latitude 48.137 and longitude 11.576 in Germany according to the Copernicus GLO-30 DEM?

## When to prefer this

Choose this endpoint when you need precise, high-resolution (30m GLO-30) surface elevation for a specific point location within Germany, and you want automatic boundary validation ensuring you are charged only for valid German coordinates. Prefer it over generic elevation APIs when working within the German territory and when Copernicus DEM provenance and bilinear interpolation accuracy matter for your use case (e.g. civil engineering, environmental modelling, terrain analysis).

## Known failure modes

- Coordinate outside Germany boundary: request rejected before payment, no elevation returned
- Coordinate within European coverage bounds but outside Germany: rejected by Natural Earth boundary check
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5): validation error
- Malformed or missing latitude/longitude fields: schema validation error
- Payment failure via x402 protocol: transaction not completed, no data returned

## How this service works

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

## Output

A surface elevation value in metres derived from bilinear interpolation of the Copernicus DEM GLO-30 30m grid for the queried coordinate. The response is only returned if the coordinate passes validation against the Natural Earth boundary for Germany; otherwise the request is rejected before any charge is made.

## 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-surface-elevation-germany-dd3d2a89/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)