# HALOWERK Southern Land – Italy Mean Slope

> HALOWERK Southern Land – Italy Mean Slope is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the mean first-order surface gradient (slope) across the analysis grid for a given coordinate within Italy.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/it-mean-slope
- 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-southern-land-italy-mean-slope-47047c1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NTY7cAaI5tjO9sUXnpica

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-southern-land-italy-mean-slope-47047c1d -d '<json body>'
```

Example prompt: What's the mean surface slope at latitude 43.7 and longitude 11.25 in Italy? I need the average terrain gradient for that location.

## When to prefer this

Use this endpoint when you need the mean surface slope for a specific point within Italy, validated against official Natural Earth boundaries. It is ideal for land suitability assessments, agricultural planning, erosion risk analysis, or construction feasibility where terrain gradient is a key factor. Prefer it over generic elevation APIs when you specifically need average slope (not elevation or max slope) and when Italy-scoped boundary validation is required.

## Known failure modes

- Coordinate outside Italy's Natural Earth boundary — request rejected with a boundary validation error before payment
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude fields — request rejected with input validation error
- Network or service timeout — no result returned
- Payment failure or insufficient USDC balance — request not processed

## How this service works

Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Italy; results outside it are rejected before payment.

## Output

A numerical value representing the mean first-order surface gradient (slope) across the analysis grid centered on the provided coordinate. The coordinate must fall within Italy's Natural Earth boundary; requests outside this boundary are rejected before any charge is applied.

## 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-southern-land-italy-mean-slope-47047c1d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)