# HALOWERK Europe Land – Max Slope Point

> HALOWERK Europe Land – Max Slope Point is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the maximum surface slope gradient within a 60-metre analysis grid around a given European coordinate, derived from elevation data.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-max-slope-point
- 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-europe-land-max-slope-point-139f5b10
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c2km3UxyKfDE-RZ5XGsTG

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-europe-land-max-slope-point-139f5b10 -d '<json body>'
```

Example prompt: What is the maximum terrain slope within a 60-metre area around latitude 48.8566, longitude 2.3522 in Europe?

## When to prefer this

Choose this endpoint when you need a precise, point-based maximum slope value for a specific European location using a fine 60-metre analysis window. It is ideal for site-level assessments (construction, solar, agriculture, routing) where local terrain steepness at a single coordinate matters more than broader area statistics. Prefer it over polygon-based or larger-radius alternatives when the exact steepest gradient at a point is required.

## Known failure modes

- Coordinates outside European coverage bounds (latitude 34–72.5, longitude -31.5–40.5) return an error or empty result
- Invalid or non-numeric coordinate values cause a validation error
- Coastal or border edge cases may have incomplete elevation data
- Service may return null if the local grid has insufficient elevation coverage

## How this service works

Maximum adjacent-cell surface gradient across the analysis grid. The service evaluates a 60 metre local analysis grid around one coordinate and returns standardized units across all 30 covered countries.

## Output

A single numeric value representing the maximum adjacent-cell surface slope gradient (steepest rise/run) within a 60-metre analysis grid centred on the supplied coordinate, returned in standardized units consistent across all 30 covered European countries.

## 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-europe-land-max-slope-point-139f5b10/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)