# HALOWERK Eastern Land – Hungary Soil Coarse-Fragment Volume (0–5 cm)

> HALOWERK Eastern Land – Hungary Soil Coarse-Fragment Volume (0–5 cm) is a paid API for AI agents from ostland.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 topsoil layer at a given coordinate within Hungary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-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-eastern-land-hungary-soil-coarse-fragment-volume-0-5-cm-1e62c10d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j9DA6wzFm70NxVqV4S4IQ

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-eastern-land-hungary-soil-coarse-fragment-volume-0-5-cm-1e62c10d -d '<json body>'
```

Example prompt: What's the mean coarse-fragment volume in the 0–5 cm topsoil layer at latitude 47.49 and longitude 19.04 in Hungary?

## When to prefer this

Use this endpoint when you need point-level SoilGrids coarse-fragment (rock fragment) volume specifically for locations within Hungary at the 0–5 cm depth interval. It is preferable when you want a pre-validated, pay-per-call lookup with built-in Hungary boundary enforcement, avoiding the overhead of querying SoilGrids directly and handling geographic validation yourself.

## Known failure modes

- Coordinate outside Hungary boundary — rejected with a validation error before any charge
- Coordinate within European coverage bounds but outside Hungary polygon — boundary check failure
- Latitude or longitude outside the stated European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing or malformed latitude/longitude fields — request rejected
- Service unavailable or SoilGrids data gap — may return null or error for sparse data areas

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

## Output

A numeric value representing the mean volumetric coarse-fragment content (%) in the 0–5 cm topsoil layer at the queried coordinate, derived from SoilGrids data. Coordinates outside Hungary's Natural Earth boundary are rejected before the response is returned.

## 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-eastern-land-hungary-soil-coarse-fragment-volume-0-5-cm-1e62c10d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)