# HALOWERK Central Land – Czechia Soil Sand Fraction (0-5 cm)

> HALOWERK Central Land – Czechia Soil Sand 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 sand fraction for the 0-5 cm soil layer at a given coordinate within Czechia, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-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-central-land-czechia-soil-sand-fraction-0-5-cm-27f8d025
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_osv0PJJBtr3mlABDWJ5cS

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-czechia-soil-sand-fraction-0-5-cm-27f8d025 -d '<json body>'
```

Example prompt: What's the mean sand fraction in the top 0-5 cm of soil at latitude 50.08 and longitude 14.44 in Czechia?

## When to prefer this

Choose this endpoint when you need SoilGrids sand fraction data specifically for locations within Czechia and want boundary validation built in. Prefer it over raw SoilGrids API access when working with pay-per-call agent workflows using x402 micropayments, or when you need a lightweight lookup for a single Czech coordinate without managing full SoilGrids authentication.

## Known failure modes

- Coordinate outside Czechia boundary: rejected with an error before payment is charged
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5): validation error
- Missing required latitude or longitude fields: schema validation error
- SoilGrids data unavailable for the exact point: may return null or no-data value
- Payment failure via x402 protocol: request not processed

## How this service works

Mean SoilGrids sand 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 sand fraction (likely as a percentage or fraction value) for the 0-5 cm topsoil layer at the requested coordinate, sourced from SoilGrids. Coordinates outside Czechia's Natural Earth boundary are rejected before processing.

## 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-czechia-soil-sand-fraction-0-5-cm-27f8d025/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)