# HALOWERK Eastern Land – Romania Depression Depth

> HALOWERK Eastern Land – Romania 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 and the center cell elevation, quantifying local topographic depression depth at a given coordinate in Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-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-romania-depression-depth-e4488d53
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vqVSuUw6uJkJc7EAXV4vk

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-romania-depression-depth-e4488d53 -d '<json body>'
```

Example prompt: What's the local depression depth at latitude 45.75, longitude 25.23 in Romania — how much lower is that point than the surrounding terrain?

## When to prefer this

Choose this endpoint when you need to quantify local topographic depression depth specifically within Romania, particularly for hydrology, flood risk, drainage planning, or site suitability analysis. It is purpose-built for Romanian geography with built-in boundary validation, making it more reliable than generic elevation APIs for this region.

## Known failure modes

- Coordinate outside Romania's Natural Earth boundary — request rejected before payment with a validation error
- Latitude or longitude outside accepted WGS84 European coverage range — schema validation failure
- No measurable depression at location (flat terrain) — may return zero
- Network timeout or service unavailability — HTTP 5xx error

## How this service works

Positive difference between the neighborhood mean and center elevation. The coordinate is validated against the Natural Earth boundary for Romania; 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 queried coordinate, indicating how much of a topographic depression exists at that point. Coordinates outside Romania's Natural Earth boundary are rejected with an error before any payment is processed.

## 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-romania-depression-depth-e4488d53/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)