# HALOWERK Central Land – Slovakia Soil Silt Fraction (0-5 cm)

> HALOWERK Central Land – Slovakia Soil Silt Fraction (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 silt fraction for the 0-5 cm depth layer at a given WGS84 coordinate within Slovakia, rejecting coordinates outside the country boundary.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-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-central-land-slovakia-soil-silt-fraction-0-5-cm-859b16a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZgboEzuBCI04wLksklLE0

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-slovakia-soil-silt-fraction-0-5-cm-859b16a6 -d '<json body>'
```

Example prompt: What's the mean silt fraction in the top 5 cm of soil at latitude 48.15, longitude 17.11 in Slovakia?

## When to prefer this

Choose this endpoint when you need granular, point-level topsoil silt fraction data specifically for locations within Slovakia, sourced from the globally consistent SoilGrids dataset. It is ideal for agricultural analysis, soil texture mapping, environmental assessments, or construction planning within Slovak territory. The built-in boundary validation ensures you only pay for valid Slovak coordinates.

## Known failure modes

- Coordinate outside Slovakia boundary — request rejected before payment is processed
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate fields — schema validation failure
- Coordinate within Europe but outside Slovakia — boundary rejection
- Network or upstream SoilGrids data unavailability — service 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 Slovakia; results outside it are rejected before payment.

## Output

A numeric value representing the mean silt fraction (likely as a percentage or g/kg) in the 0-5 cm depth layer at the specified coordinate, sourced from SoilGrids data and only returned for points that fall within Slovakia's boundary.

## 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-slovakia-soil-silt-fraction-0-5-cm-859b16a6/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)