# HALOWERK Central Land – CZ Depression Depth

> HALOWERK Central Land – CZ Depression Depth is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the positive elevation difference between the neighborhood mean and the center point elevation (depression depth) for a given coordinate within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-depression-depth
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-cz-depression-depth-5ef89540
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xxd60-uwV8MOLfApl4iTX

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-central-land-cz-depression-depth-5ef89540 -d '<json body>'
```

Example prompt: What's the depression depth at latitude 49.75, longitude 13.38 in Czechia — how much lower is that point compared to the surrounding terrain?

## When to prefer this

Use this endpoint when you specifically need the topographic depression depth (neighborhood mean minus center elevation) for a point in Czechia, derived from Copernicus DEM GLO-30 data. Prefer it over generic elevation APIs when you need localized concavity analysis rather than absolute elevation, and when your coordinate is confirmed to be within the Czech Republic boundary.

## Known failure modes

- Coordinate outside Czechia boundary — rejected before payment is processed
- Latitude or longitude out of European coverage range (34–72.5°N, -31.5–40.5°E) — validation error
- Network or service timeout
- Invalid input types for latitude or longitude fields

## How this service works

Positive difference between the neighborhood mean and center elevation. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

## Output

A numeric value representing the positive difference (in meters) between the neighborhood mean elevation and the center point elevation at the queried coordinate, indicating how deep the local topographic depression is. Returns a rejection if the coordinate falls outside the Natural Earth boundary for Czechia.

## 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-central-land-cz-depression-depth-5ef89540/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)