# HALOWERK Southern Land – Malta Depression Depth

> HALOWERK Southern Land – Malta Depression Depth is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the positive elevation difference between the neighborhood mean and the center-cell elevation (depression depth) for a coordinate within Malta.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-depression-depth
- 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-southern-land-malta-depression-depth-e30742f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nZ-xWHeoaDv70LT-WBzHR

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-malta-depression-depth-e30742f5 -d '<json body>'
```

Example prompt: What's the depression depth at latitude 35.89, longitude 14.42 in Malta — I need the positive difference between the surrounding neighborhood elevation and the center point elevation there.

## When to prefer this

Use this endpoint when you need a precise local depression depth metric for a point location within Malta specifically. It is ideal for hydrological, agricultural, or geotechnical analyses where knowing whether a site sits in a topographic low relative to its surroundings is important. Prefer it over generic DEM APIs when you need a pre-validated, pay-per-call result scoped to Malta without managing your own elevation data pipelines.

## Known failure modes

- Coordinate outside Malta boundary: request rejected before payment with a validation error
- Coordinate within European bounding box but outside Malta polygon: rejected by Natural Earth boundary check
- Malformed or missing latitude/longitude: schema validation error
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5): rejected

## How this service works

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

## Output

A numeric value representing the positive elevation difference in meters between the neighborhood mean elevation and the center-cell elevation at the queried coordinate. Coordinates outside the Natural Earth boundary for Malta are rejected before the 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-southern-land-malta-depression-depth-e30742f5/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)