# HALOWERK Eastern Land – Cyprus Maximum Surface Slope

> HALOWERK Eastern Land – Cyprus Maximum Surface Slope 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 maximum adjacent-cell surface gradient (steepest slope) across the analysis grid for a given coordinate within Cyprus.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/cy-max-slope
- 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-cyprus-maximum-surface-slope-95f37911
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sgd7ssGWPntoJJLkBbeoO

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-maximum-surface-slope-95f37911 -d '<json body>'
```

Example prompt: What's the maximum surface slope at latitude 35.1, longitude 33.4 in Cyprus — I need the steepest terrain gradient value for that grid cell.

## When to prefer this

Use this endpoint when you need the steepest (maximum) terrain gradient at a specific point in Cyprus and want a single scalar summary of worst-case slope across adjacent grid cells. Prefer this over mean-slope endpoints when worst-case steepness matters (e.g. erosion risk, stability assessments, construction siting). It is Cyprus-specific with boundary validation, so it is not suitable for locations outside Cyprus.

## Known failure modes

- Coordinate outside Cyprus boundary — rejected before payment with a validation error
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude fields — input schema error
- Internal computation failure — server-side error response

## How this service works

Maximum adjacent-cell surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Cyprus; results outside it are rejected before payment.

## Output

A numeric value representing the maximum adjacent-cell surface gradient (steepest slope) across the analysis grid at the specified coordinate. The coordinate is validated against Cyprus's Natural Earth boundary, and requests falling outside it are rejected before any charge is incurred.

## 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-maximum-surface-slope-95f37911/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)