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

> HALOWERK Central Land – CZ 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 soil layer at a given WGS84 coordinate, validated to fall within Czechia's boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-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-cz-soil-silt-fraction-0-5-cm-5c130189
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qr8oJsCpnn9fNtHcg2PIn

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-cz-soil-silt-fraction-0-5-cm-5c130189 -d '<json body>'
```

Example prompt: What's the SoilGrids silt fraction in the top 5 cm of soil at latitude 50.08, longitude 14.44 in Czechia?

## When to prefer this

Choose this endpoint when you need authoritative, SoilGrids-derived silt fraction data specifically for surface soil (0–5 cm) at a point location within Czechia. It is ideal for precision agriculture, environmental assessments, or geotechnical surveys requiring validated Czech-boundary checks before incurring any cost. If you need soil data outside Czechia, other HALOWERK regional endpoints or broader SoilGrids APIs should be used.

## Known failure modes

- Coordinate outside Czechia's Natural Earth boundary — request rejected before payment
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate values — schema validation failure
- SoilGrids data unavailable or missing for the queried location — possible null or error response

## How this service works

Mean SoilGrids silt fraction for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

## Output

Returns the mean silt fraction (likely as a percentage or volumetric fraction) for the 0–5 cm topsoil layer at the requested coordinate, sourced from the SoilGrids dataset, only if the coordinate falls within the validated Natural Earth boundary for Czechia.

## 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-cz-soil-silt-fraction-0-5-cm-5c130189/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)