# HALOWERK Land Compare – Local Background Deviation Max Slope

> HALOWERK Land Compare – Local Background Deviation Max Slope is a paid API for AI agents from landvergleich.halowerk.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-13).

Compares the 60-metre site-level maximum slope at a given European coordinate with the 1,000-metre local background slope derived from the same source, and returns the deviation between them.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-max-slope
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-land-compare-local-background-deviation-max-slope-fe11b031
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WksoieZqRszrcNUygnIT6

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-deviation-max-slope-fe11b031 -d '<json body>'
```

Example prompt: Can you compare the maximum slope at coordinates 48.2° N, 11.6° E to the local background slope in the surrounding 1 km area using the HALOWERK land comparison service?

## When to prefer this

Choose this endpoint when you need to understand how a specific European site's steepness compares to its immediate neighbourhood rather than just measuring absolute slope. It is ideal for site suitability analysis, identifying topographic anomalies, or screening locations where local terrain context matters. Use it over a simple slope endpoint when the relative deviation from local background is the key decision variable.

## Known failure modes

- Coordinates outside the European coverage area (latitude 34–72.5, longitude -31.5–40.5) will result in an error or null response
- Missing or malformed latitude/longitude values will cause a validation error
- Edge locations near coverage boundaries may return degraded or unavailable data
- Transient upstream data source failures may cause intermittent errors

## How this service works

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

## Output

Returns the measured maximum slope value at the 60-metre site resolution, the 1,000-metre local background maximum slope derived from the same data source, and the numerical deviation between them — indicating whether the site is steeper or shallower than its broader local context.

## 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-deviation-max-slope-fe11b031/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)