# HALOWERK Land Compare – Local Background Deviation for Drainage Tendency

> HALOWERK Land Compare – Local Background Deviation for Drainage Tendency 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-level surface drainage tendency measurement against a 1,000-metre local background value for the same European location and returns the deviation between them.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/local-background-deviation-drainage-tendency
- 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-for-drainage-tendency-3b506366
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D1zluY-w0NiLMPwaM1RI1

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-for-drainage-tendency-3b506366 -d '<json body>'
```

Example prompt: What's the deviation between the 60-metre site drainage tendency and the 1,000-metre local background at latitude 51.35, longitude 8.72 in Europe?

## When to prefer this

Choose this endpoint when you need to understand how a specific European site's surface drainage tendency differs from its immediate landscape context — particularly useful for land assessment, agricultural due diligence, construction hydrology checks, or environmental impact studies where local hydrological contrast (rather than absolute drainage value alone) is the key metric.

## Known failure modes

- Coordinates outside European coverage (lat 34–72.5, lon -31.5–40.5) return a validation or out-of-bounds error
- Missing latitude or longitude parameter causes a 422 or bad-request response
- Coastal or data-void pixels may return null or no-data indicators
- Payment failure via x402 results in 402 Payment Required response

## How this service works

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

## Output

Returns the 60-metre site-level surface drainage tendency value, the 1,000-metre local background drainage tendency measured from the same data source, and the signed deviation between them — allowing direct interpretation of whether the site drains more or less readily than 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-deviation-for-drainage-tendency-3b506366/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)