# HALOWERK Land Compare – Local Background Deviation of Depression Depth

> HALOWERK Land Compare – Local Background Deviation of Depression Depth 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-resolution local depression depth at a given European coordinate against a 1,000-metre local background value from the same source and returns the signed deviation between them.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-depression-depth
- 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-of-depression-depth-8d03b6c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-V9ila0hpimXc4oUDl26q

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-of-depression-depth-8d03b6c9 -d '<json body>'
```

Example prompt: What's the deviation between the local 60-metre depression depth and the 1,000-metre background depression depth at latitude 51.5 and longitude 10.3 in Europe?

## When to prefer this

Use this endpoint when you need to understand the relative depression depth anomaly of a specific European point compared to its local landscape context — for example, in flood risk screening, agricultural drainage analysis, or ecological site characterisation. Choose it over a simple elevation or slope lookup when the contrast between fine-scale and background-scale depression is the key signal.

## Known failure modes

- Coordinate outside European coverage bounds (latitude 34–72.5, longitude -31.5–40.5) returns a validation error
- Missing latitude or longitude parameter causes a 400 bad request
- Server unavailability or timeout returns a 5xx error
- Coordinates over ocean or non-covered areas may return null or no-data values

## How this service works

Compares the 60 metre site measurement for local depression depth 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 local depression depth measurement and the 1,000-metre local background depression depth measured at the same source, allowing comparison of micro-scale terrain concavity against its meso-scale 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-of-depression-depth-8d03b6c9/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)