# HALOWERK Central Land – Slovakia Soil Bulk Density (0–5 cm)

> HALOWERK Central Land – Slovakia Soil Bulk Density (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 2026-09-13).

Returns the mean SoilGrids bulk density for the 0–5 cm soil layer at a given WGS84 coordinate validated against the Slovakia boundary.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-soil-bulk-density
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-slovakia-soil-bulk-density-0-5-cm-02f8483e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6R3ubmPLNTDSuq_UMJ-rk

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-bulk-density-0-5-cm-02f8483e -d '<json body>'
```

Example prompt: What's the mean SoilGrids bulk density for the top 0–5 cm of soil at latitude 48.15, longitude 17.11 in Slovakia?

## When to prefer this

Choose this endpoint when you need point-level SoilGrids bulk density specifically for the 0–5 cm topsoil layer at a location within Slovakia. It is ideal for agricultural planning, soil carbon modelling, or environmental assessments requiring validated, boundary-checked data at micro-payment cost. Prefer it over general SoilGrids API access when you want built-in Slovakia boundary validation and a pay-per-call model without managing API keys.

## Known failure modes

- Coordinate outside Slovakia boundary – request rejected before payment with a boundary validation error
- Coordinate within broader European coverage range but outside Slovakia polygon – rejected
- Missing or non-numeric latitude/longitude – validation error returned
- Latitude/longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) – rejected
- Service unavailable or upstream SoilGrids data timeout – 5xx error

## How this service works

Mean SoilGrids bulk density 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 mean bulk density value (typically in kg/dm³ or g/cm³) for the 0–5 cm soil layer at the queried coordinate, sourced from SoilGrids. The coordinate is pre-validated against the Slovakia Natural Earth boundary; requests outside Slovakia are rejected before any charge is applied.

## 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-bulk-density-0-5-cm-02f8483e/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)