# HALOWERK Central Land – Austria Soil Coarse Fragment Volume (0-5 cm)

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

Returns the mean SoilGrids coarse-fragment volume percentage for the 0–5 cm soil layer at a given WGS84 coordinate within Austria.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-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-central-land-austria-soil-coarse-fragment-volume-0-5-cm-18f8deb0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WHZ8bGaU5vbGagLV6vAFs

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-central-land-austria-soil-coarse-fragment-volume-0-5-cm-18f8deb0 -d '<json body>'
```

Example prompt: What's the mean coarse-fragment volume in the top 5 cm of soil at latitude 47.5 and longitude 14.2 in Austria? I need the SoilGrids value for that point.

## When to prefer this

Use this endpoint when you need point-level soil coarse-fragment volume data specifically within Austria, sourced from SoilGrids. Prefer it over generic soil APIs when you require micropayment-gated, validated Austrian geospatial soil data with built-in boundary enforcement. It is part of a broader HALOWERK suite covering soil chemistry, land cover, and terrain metrics for Central Europe.

## Known failure modes

- Coordinate outside Austria boundary — request rejected before processing
- Latitude or longitude outside valid European range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate parameters — schema validation failure
- Payment failure — x402 micropayment not completed, request not processed
- Upstream SoilGrids data unavailable for remote or edge-case coordinates

## 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 Austria; results outside it are rejected before payment.

## Output

A numeric value representing the mean volumetric coarse-fragment content (gravel, stones, etc.) in the 0–5 cm topsoil layer at the queried coordinate, sourced from SoilGrids. The coordinate is validated against Austria's Natural Earth boundary before the result is returned; coordinates outside Austria are rejected.

## 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-central-land-austria-soil-coarse-fragment-volume-0-5-cm-18f8deb0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)