# HALOWERK Europe Land – Max Slope Buffer 1000m

> HALOWERK Europe Land – Max Slope Buffer 1000m is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the maximum adjacent-cell surface gradient (slope) within a 1,000-metre circular neighbourhood around a given European coordinate, covering 30 countries.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-max-slope-buffer-1000m
- Price: $0.006/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-buffer-1000m-e75b10ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pcaJwyxrgxXB2ZbMOtJ4R

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-buffer-1000m-e75b10ee -d '<json body>'
```

Example prompt: What's the maximum terrain slope within a 1,000-metre buffer around latitude 48.8566, longitude 2.3522 in Europe?

## When to prefer this

Use this endpoint when you need the maximum terrain slope within a 1,000-metre radius around a specific European point — ideal for site suitability, infrastructure planning, ecological assessments, or routing where a broader neighbourhood context (1km) matters more than a fine-grained local (60m) analysis. Prefer it over the 60m or polygon variants when standardized cross-country comparability and a 1km catchment zone are required.

## Known failure modes

- Coordinates outside European coverage bounds (lat 34–72.5, lon -31.5–40.5) result in an error or null response
- Invalid or missing latitude/longitude parameters cause a validation error
- Payment failure via x402 protocol blocks the request
- Server-side data gaps for remote or coastal edge areas may yield incomplete results

## How this service works

Maximum adjacent-cell surface gradient across the analysis grid. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A single standardized maximum slope value representing the steepest adjacent-cell surface gradient found within the 1,000-metre circular neighbourhood centred on the provided coordinate, expressed in consistent units 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-buffer-1000m-e75b10ee/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)