# HALOWERK Central Land – Slovakia Depression Depth

> HALOWERK Central Land – Slovakia 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 elevation and the center point elevation for a given coordinate in Slovakia, indicating how depressed the terrain is relative to its surroundings.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-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-slovakia-depression-depth-8ae05f18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sU6y2qWNtGETHuTRqLF9x

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-slovakia-depression-depth-8ae05f18 -d '<json body>'
```

Example prompt: What's the terrain depression depth at latitude 48.7 and longitude 19.5 in Slovakia — I need to know how much lower that point is compared to its surrounding neighborhood elevation.

## When to prefer this

Choose this endpoint when you need a precise, point-level terrain depression metric for a coordinate specifically within Slovakia, validated against official Natural Earth boundaries. It is ideal for hydrological modeling, flood risk analysis, agricultural planning, or terrain feature mapping where knowing how depressed a location is relative to its surroundings matters. Prefer this over generic DEM elevation lookups when you need neighborhood-relative concavity rather than absolute elevation.

## Known failure modes

- Coordinate outside Slovakia boundary — rejected before payment with a validation error
- Latitude or longitude outside the allowed European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed or missing latitude/longitude parameters — 400 bad request
- Payment failure via x402 protocol — request not processed

## How this service works

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

## Output

A numeric value representing the positive elevation difference (in meters) between the neighborhood mean surface elevation and the center point elevation at the given coordinate, indicating how much the location is depressed relative to its immediate surroundings. Returns an error if the coordinate falls outside the Natural Earth boundary for Slovakia.

## 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-slovakia-depression-depth-8ae05f18/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)