# HALOWERK Eastern Land – Cyprus Depression Depth

> HALOWERK Eastern Land – Cyprus 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 2026-09-14).

Returns the positive elevation difference between a neighborhood mean elevation and the center cell elevation (depression depth) for a given coordinate in Cyprus.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/cy-depression-depth
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-eastern-land-cyprus-depression-depth-7447264b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sRsOLz1vTRWKPN_b8Gl1v

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-cyprus-depression-depth-7447264b -d '<json body>'
```

Example prompt: What's the depression depth at latitude 34.85, longitude 33.04 in Cyprus — how much lower is that point compared to its surrounding neighborhood elevation?

## When to prefer this

Use this endpoint when you need to quantify how much a specific point in Cyprus sits below its surrounding terrain — useful for depression mapping, flood susceptibility analysis, agricultural drainage assessment, or terrain concavity characterization. Prefer this over generic DEM queries when you specifically need the neighborhood-mean-minus-center-elevation metric validated against the Cyprus boundary.

## Known failure modes

- Coordinate outside Cyprus Natural Earth boundary — rejected with validation error before payment
- Latitude or longitude out of published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Coordinate within European range but outside Cyprus boundary — boundary check rejection
- Network timeout or service unavailability — connection error
- Invalid input types (e.g. string instead of number) — schema parse error

## How this service works

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

## Output

A numeric value representing the positive difference in meters between the mean elevation of the surrounding neighborhood and the center cell elevation at the queried coordinate, indicating how much the location is depressed below its surroundings. Coordinates outside the Cyprus Natural Earth boundary are rejected.

## 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-cyprus-depression-depth-7447264b/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)