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

> HALOWERK Southern Land – Greece 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 volumetric coarse-fragment content (%) of the 0-5 cm soil layer for a given coordinate within Greece, sourced from SoilGrids.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/gr-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-greece-soil-coarse-fragment-volume-0-5-cm-61e65ba3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QkxWNY0ihSA270g5_qaoK

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-greece-soil-coarse-fragment-volume-0-5-cm-61e65ba3 -d '<json body>'
```

Example prompt: What's the mean volumetric coarse-fragment content in the 0-5 cm soil layer at latitude 37.97, longitude 23.73 in Greece?

## When to prefer this

Use this endpoint when you need the SoilGrids coarse-fragment volume specifically for the 0-5 cm topsoil layer at a point location within Greece. It is ideal for precision agriculture, land suitability assessments, soil profile enrichment, or any workflow requiring validated, paid-per-call soil stoniness data restricted to Greek territory. Prefer it over generic soil APIs when Greece-specific boundary validation and micropayment-per-query billing (x402) are acceptable or desirable.

## Known failure modes

- Coordinate outside Greece boundary — rejected before payment with an out-of-bounds error
- Latitude or longitude out of the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing required latitude or longitude parameter — request validation error
- SoilGrids data unavailable for the specific cell — may return null or no-data response
- Network or upstream SoilGrids service outage — server error response

## 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 Greece; 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 requested coordinate, derived from SoilGrids data. The coordinate is first validated against the Natural Earth boundary for Greece; requests outside Greece 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-greece-soil-coarse-fragment-volume-0-5-cm-61e65ba3/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)