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

> HALOWERK Central Land – Slovakia Soil pH (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 pH in H₂O for the 0–5 cm soil layer at a given WGS84 coordinate within Slovakia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-soil-ph
- 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-ph-0-5-cm-f5948a89
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_urNWhCA7hbanxbks7Qf-n

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-ph-0-5-cm-f5948a89 -d '<json body>'
```

Example prompt: What's the mean soil pH for the top 5 cm at latitude 48.7, longitude 18.9 in Slovakia? I need the SoilGrids H₂O pH reading for that spot.

## When to prefer this

Choose this endpoint when you need a single-point SoilGrids topsoil pH value specifically within Slovakia and want built-in boundary validation so out-of-scope queries are rejected before billing. Prefer this over generic GIS APIs when Slovakia-scoped soil pH data from the standardised SoilGrids 0–5 cm layer is the exact requirement.

## Known failure modes

- Coordinate outside Slovakia boundary: request rejected before payment, error indicating invalid geographic scope
- Latitude or longitude outside the European coverage range (34–72.5°N, -31.5–40.5°E): validation error
- Malformed input (non-numeric or missing lat/lon): schema validation error
- SoilGrids upstream data unavailable: service error or timeout

## How this service works

Mean SoilGrids pH in H2O 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 soil pH value (pH in H₂O scale) for the 0–5 cm topsoil layer at the queried coordinate, derived from SoilGrids data. Coordinates outside Slovakia's Natural Earth boundary 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-ph-0-5-cm-f5948a89/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)