# HALOWERK Southern Land – Malta Soil Coarse-Fragment Volume (0-5 cm)

> HALOWERK Southern Land – Malta Soil Coarse-Fragment Volume (0-5 cm) is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids coarse-fragment volume (% vol) for the 0–5 cm soil layer at a given coordinate within Malta, validated against the Natural Earth Malta boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-soil-coarse-fragments
- Price: $0.004/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-soil-coarse-fragment-volume-0-5-cm-1b32bf2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oPq5T45A4SYqjtfnAnazl

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-soil-coarse-fragment-volume-0-5-cm-1b32bf2a -d '<json body>'
```

Example prompt: What's the mean coarse-fragment volume in the top 0–5 cm of soil at latitude 35.9042, longitude 14.5189 in Malta?

## When to prefer this

Choose this endpoint when you need SoilGrids coarse-fragment volume specifically for a point location within Malta and want built-in boundary validation to avoid invalid queries. It is ideal for per-coordinate lookups in soil surveys, land assessments, or environmental datasets scoped to Malta. If you need broader European coverage or other soil properties (sand, clay, pH, nitrogen, CEC), use the sibling endpoints on the same provider.

## Known failure modes

- Coordinate outside Malta boundary: request rejected with a boundary validation error before payment
- Latitude or longitude out of published European coverage range (34–72.5°N, -31.5–40.5°E): validation error
- Missing required latitude or longitude fields: schema validation error
- Service unavailable or upstream SoilGrids data inaccessible: 5xx error

## How this service works

Mean SoilGrids coarse-fragment volume for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Malta; results outside it are rejected before payment.

## Output

A numeric value representing the mean volumetric coarse-fragment content (stones and gravel >2 mm, expressed as % volume) in the 0–5 cm topsoil layer at the requested coordinate, sourced from SoilGrids. Coordinates outside the Malta boundary are rejected before any charge is applied.

## 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-soil-coarse-fragment-volume-0-5-cm-1b32bf2a/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)