# HALOWERK Europe Land – Depression Depth (Point)

> HALOWERK Europe Land – Depression Depth (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 positive difference between the neighborhood mean elevation and the center point elevation, quantifying how deep a topographic depression is at a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-depression-depth-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-depression-depth-point-b1ebb895
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YBb_iy1oCHYdaQgJ7oJN6

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-depression-depth-point-b1ebb895 -d '<json body>'
```

Example prompt: What's the topographic depression depth at latitude 51.5, longitude 10.2 in Germany — I need to know how much lower that point sits compared to its surrounding 60-metre neighbourhood elevation?

## When to prefer this

Choose this endpoint when you need a fast, standardized depression-depth metric for a single European point using a fixed 60-metre local analysis window, especially when comparing terrain concavity consistently across multiple countries. It is purpose-built for European land coverage and returns a ready-to-use numeric metric without requiring you to source or process elevation rasters yourself.

## Known failure modes

- Coordinates outside the European coverage bounds (latitude 34–72.5°N, longitude −31.5–40.5°E) return a validation error
- Coordinates over open ocean or outside land coverage may return null or no-data values
- Invalid or non-numeric coordinate inputs cause a schema validation error
- Payment failure or insufficient USDC balance results in a 402 Payment Required response

## How this service works

Positive difference between the neighborhood mean and center elevation. The service evaluates a 60 metre local analysis grid around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized numeric value representing the positive elevation difference between the 60-metre neighbourhood mean elevation and the center point elevation (depression depth in consistent units), covering any coordinate within the 30-country European coverage area.

## 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-depression-depth-point-b1ebb895/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)