# HALOWERK Eastern Land – Hungary Soil Silt Fraction (0-5 cm)

> HALOWERK Eastern Land – Hungary Soil Silt Fraction (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 silt fraction for the 0-5 cm soil layer at a given WGS84 coordinate within Hungary, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-soil-silt
- 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-silt-fraction-0-5-cm-a1c1c03e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AmUy1PP2ffMc7BCNaEeVb

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-silt-fraction-0-5-cm-a1c1c03e -d '<json body>'
```

Example prompt: What's the mean silt fraction in the top 0-5 cm of soil at latitude 47.4979, longitude 19.0402 in Hungary?

## When to prefer this

Choose this endpoint when you need fine-resolution (0-5 cm) topsoil silt fraction data specifically for locations within Hungary, and want boundary validation to prevent wasted calls for out-of-scope coordinates. Prefer it over generic global soil APIs when Hungary-specific coverage and per-call micropayment pricing ($0.004 USDC) suit your budget.

## Known failure modes

- Coordinate outside Hungary boundary — request rejected with validation error before payment
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Network or upstream SoilGrids data unavailability — service error response
- Malformed or missing latitude/longitude fields — input validation error

## How this service works

Mean SoilGrids silt 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

Returns the mean silt fraction (as a proportion or percentage) for the 0-5 cm soil layer at the specified coordinate, sourced from SoilGrids. Coordinates outside Hungary's Natural Earth boundary are rejected before any 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-silt-fraction-0-5-cm-a1c1c03e/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)