# HALOWERK Central Land – CZ Soil Coarse Fragments (0-5 cm)

> HALOWERK Central Land – CZ Soil Coarse Fragments (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 (%) for the 0–5 cm soil layer at a given coordinate within Czechia, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-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-cz-soil-coarse-fragments-0-5-cm-3cb8c667
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DLfTSeN_Zkd8uVP13O-7L

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-cz-soil-coarse-fragments-0-5-cm-3cb8c667 -d '<json body>'
```

Example prompt: What's the mean coarse-fragment volume in the 0-5 cm soil layer at latitude 49.74, longitude 13.38 in Czechia?

## When to prefer this

Choose this endpoint when you need SoilGrids coarse-fragment volume specifically for a point within Czechia and want boundary validation enforced server-side before payment. It is ideal for per-point lookups in agricultural, environmental, or construction workflows targeting Czech territory. Prefer it over generic SoilGrids API access when you want a pay-per-call micro-billing model and guaranteed rejection of out-of-bounds coordinates.

## Known failure modes

- Coordinate outside Czechia boundary — request rejected before payment with a boundary validation error
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- No SoilGrids data available for the queried location — null or missing value response
- Malformed JSON input — 400 bad request
- Payment failure via x402 protocol — transaction not processed

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

## Output

A numeric value representing the mean volumetric coarse-fragment content (%) in the 0–5 cm soil layer at the queried coordinate, derived from SoilGrids data, returned only if the coordinate falls within the Czechia boundary as validated by Natural Earth; coordinates outside the boundary are rejected before payment is charged.

## 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-cz-soil-coarse-fragments-0-5-cm-3cb8c667/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)