# HALOWERK Central Land – Local Relief (Austria)

> HALOWERK Central Land – Local Relief (Austria) 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 the local relief amplitude (max minus min surface elevation) for a given coordinate within Austria, derived from sampled elevation data.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-local-relief
- 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-local-relief-austria-19d97130
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KYqmUWdpemZp7Zik98b3b

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-local-relief-austria-19d97130 -d '<json body>'
```

Example prompt: What's the local topographic relief — the difference between the highest and lowest sampled elevation — at 47.8103° N, 13.0550° E in Austria?

## When to prefer this

Use this endpoint when you need a single, paid, per-query local relief value for a specific coordinate within Austria. It is ideal for terrain roughness analysis, site suitability checks, or geospatial enrichment pipelines that need Austria-specific topographic amplitude data without building your own DEM processing pipeline.

## Known failure modes

- Coordinate outside Austria boundary — rejected before processing, no result returned
- Latitude or longitude out of the accepted European coverage range — validation error
- Missing or malformed latitude/longitude parameters — request rejected
- Payment failure or insufficient funds via x402 — call not executed

## How this service works

Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.

## Output

A numeric value representing the local relief amplitude in meters — the difference between the maximum and minimum sampled surface elevation within the analysis neighborhood around the given coordinate. The coordinate is validated against the Austria boundary before the result is returned.

## 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-local-relief-austria-19d97130/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)