# HALOWERK Eastern Land Hungary Soil Sand Fraction

> HALOWERK Eastern Land Hungary Soil Sand Fraction 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 sand fraction for the 0–5 cm soil layer at a given coordinate within Hungary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-soil-sand
- 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-sand-fraction-e2f81191
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CtoeVDk3AcYoWG3Pdc6Rp

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-sand-fraction-e2f81191 -d '<json body>'
```

Example prompt: What's the mean sand fraction in the top 5 cm of soil at latitude 47.5, longitude 19.0 in Hungary?

## When to prefer this

Choose this endpoint when you need SoilGrids-derived topsoil sand fraction data specifically for points within Hungary and want boundary validation enforced before incurring a charge. Prefer it over general SoilGrids APIs when operating in a pay-per-call agent workflow requiring x402 micropayments, or when you need a lightweight single-point lookup rather than a bulk raster download.

## Known failure modes

- Coordinate outside Hungary boundary — rejected before payment with a geographic validation error
- Coordinate outside general European coverage bounds (lat 34–72.5, lon -31.5–40.5) — input validation failure
- Invalid or missing latitude/longitude — schema validation error
- SoilGrids data unavailable for the queried cell — possible null or no-data response
- Payment failure via x402 protocol — transaction not completed, result not returned

## How this service works

Mean SoilGrids sand fraction 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 sand fraction (likely as a percentage or volume fraction) of the 0–5 cm topsoil layer at the specified coordinate, sourced from SoilGrids. The coordinate is validated against Hungary's Natural Earth boundary; requests outside Hungary are rejected before payment is processed.

## 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-sand-fraction-e2f81191/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)