# HALOWERK Land Compare – Local Background Deviation Mean Slope

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

Compares the 60-metre site mean slope with a 1,000-metre local background mean slope for a European coordinate and returns the signed deviation.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-mean-slope
- 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-deviation-mean-slope-bee046f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sSmBxN2eZq2ypWlrpbgqz

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-mean-slope-bee046f4 -d '<json body>'
```

Example prompt: What's the difference in mean slope between the exact site at 48.2°N, 11.5°E and the 1,000-metre local background around it — can you use the HALOWERK local background deviation tool to get the slope contrast for that European coordinate?

## When to prefer this

Choose this endpoint when you need a fast, single-point comparison of site-level slope versus landscape-scale background slope for a European location — particularly useful for land assessment, site screening, or terrain context analysis without running a full GIS pipeline.

## Known failure modes

- Coordinates outside European coverage (latitude 34–72.5°N, longitude -31.5–40.5°E) will be rejected
- Missing latitude or longitude returns a validation error
- Coordinates over ocean or data voids may return null or no-data responses
- Payment failure via x402 protocol prevents processing

## How this service works

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

## Output

Returns the mean slope measured at the 60-metre site scale, the mean slope of the 1,000-metre local background derived from the same source, and the signed deviation between the two — indicating whether the site is steeper or flatter than its surrounding landscape 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-mean-slope-bee046f4/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)