# HALOWERK Atlantic Land – Belgium Depression Depth

> HALOWERK Atlantic Land – Belgium Depression Depth is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the positive difference between neighborhood mean elevation and center elevation (depression depth) for a given coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-depression-depth
- 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-atlantic-land-belgium-depression-depth-302d56c2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DV68Reieaur3l4M86M5ug

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-atlantic-land-belgium-depression-depth-302d56c2 -d '<json body>'
```

Example prompt: What's the depression depth — the positive difference between neighborhood mean and center elevation — at latitude 50.85 and longitude 4.35 in Belgium?

## When to prefer this

Choose this endpoint when you need a localized topographic depression metric specifically for coordinates within Belgium, particularly for land analysis, hydrological assessment, flood risk modeling, or agricultural/urban planning workflows. It is distinct from general elevation lookup services because it computes the relative depression depth (neighborhood mean minus center elevation) rather than absolute elevation, and it enforces Belgium-specific boundary validation before charging.

## Known failure modes

- Coordinate outside Belgium boundary — rejected before payment with an error indicating the point falls outside the validated Natural Earth boundary for Belgium
- Coordinate within broader European coverage range but outside Belgium — rejected at boundary validation step
- Missing or malformed latitude/longitude values — input validation error
- Coordinate where elevation data is unavailable — may return null or error
- Network timeout or service unavailability

## How this service works

Positive difference between the neighborhood mean and center elevation. The coordinate is validated against the Natural Earth boundary for Belgium; results outside it are rejected before payment.

## Output

A numeric value representing the positive difference (in meters) between the neighborhood mean elevation and the center point elevation at the specified coordinate, indicating how much of a topographic depression exists at that location. Coordinates outside the Belgium boundary (validated against Natural Earth) are rejected before the computation or payment is processed.

## 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-atlantic-land-belgium-depression-depth-302d56c2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)