# HALOWERK Eastern Land – Hungary Depression Depth

> HALOWERK Eastern Land – Hungary Depression Depth is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the positive elevation difference between a neighborhood mean elevation and the center cell elevation, indicating topographic depression depth at a given coordinate in Hungary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-depression-depth
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-eastern-land-hungary-depression-depth-f53dfc45
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vSREZIClOB2VSPYyvz1eu

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-eastern-land-hungary-depression-depth-f53dfc45 -d '<json body>'
```

Example prompt: What's the topographic depression depth at 47.4979° N, 19.0402° E in Hungary — how much lower is that point compared to its surrounding neighborhood elevation?

## When to prefer this

Choose this endpoint when you specifically need depression depth (neighborhood mean minus center elevation) for a coordinate within Hungary. It is ideal for hydrological modelling, waterlogging risk assessment, agricultural site evaluation, or geospatial enrichment workflows focused on Hungarian territory. The built-in boundary validation ensures only valid Hungarian coordinates are charged, reducing erroneous spending.

## Known failure modes

- Coordinate outside Hungary boundary — request rejected before payment
- Invalid latitude/longitude values outside the published European coverage range
- Coordinate on boundary edge may produce inconsistent boundary validation results
- Network or service unavailability returning non-200 response
- Payment failure via x402 protocol preventing query execution

## How this service works

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

## Output

A numeric value representing the positive difference between the neighborhood mean elevation and the center cell elevation at the specified coordinate, indicating how deep the terrain depression is at that point. Returns an error or rejection if the coordinate falls outside Hungary's Natural Earth boundary.

## 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-eastern-land-hungary-depression-depth-f53dfc45/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)