# HALOWERK Land Compare – Local Background Elevation Deviation

> HALOWERK Land Compare – Local Background Elevation Deviation is a paid API for AI agents from landvergleich.halowerk.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Compares a 60-metre site-level elevation measurement with a 1,000-metre local background elevation from the same source and returns the signed deviation for a European coordinate.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-elevation
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-land-compare-local-background-elevation-deviation-deceba56
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QzCsmT2nLaz_EyrgOoz7j

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-land-compare-local-background-elevation-deviation-deceba56 -d '<json body>'
```

Example prompt: What's the elevation deviation between the 60-metre site measurement and the 1,000-metre local background for the location at latitude 48.8566 and longitude 2.3522 in Europe?

## When to prefer this

Use this endpoint when you need a precise, single-point comparison of site-level versus local background elevation for a European location — especially for terrain analysis, site suitability, or environmental assessments that require understanding micro-topographic relief relative to the 1 km surroundings.

## Known failure modes

- Coordinates outside European coverage bounds (lat 34–72.5, lon -31.5–40.5) return an error
- Invalid or non-numeric latitude/longitude values cause a validation error
- Missing required parameters result in a 400 bad request
- Payment not provided or insufficient funds returns a 402 error

## How this service works

Compares the 60 metre site measurement for elevation with a 1,000 metre local background measured from the same source and reports the deviation.

## Output

Returns the signed numerical deviation between the 60-metre site-level elevation and the 1,000-metre local background elevation measured from the same data source, indicating whether the site is elevated above or depressed below its surroundings.

## 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-land-compare-local-background-elevation-deviation-deceba56/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from landvergleich.halowerk.com](https://www.zero.xyz/host/landvergleich.halowerk.com/llms.txt)