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

> HALOWERK Central Land – Slovenia 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 2026-09-13).

Returns the mean SoilGrids pH (in H2O) for the 0–5 cm soil layer at a given WGS84 coordinate within Slovenia, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/si-soil-ph
- 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-slovenia-soil-ph-0-5-cm-5a8e4e39
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aNLWl18pa-cuxXmm5eWL_

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-slovenia-soil-ph-0-5-cm-5a8e4e39 -d '<json body>'
```

Example prompt: What's the mean topsoil pH in water for the 0–5 cm layer at latitude 46.05, longitude 14.51 in Slovenia?

## When to prefer this

Choose this endpoint when you need point-level topsoil pH (H2O, 0–5 cm) specifically within Slovenia and want a lightweight, paid-per-call lookup without managing a full SoilGrids API integration. Ideal for agricultural planning, environmental assessments, or geospatial pipelines that need soil acidity data for Slovenian locations.

## Known failure modes

- Coordinate outside Slovenia boundary — request rejected before payment
- Latitude or longitude outside the European coverage range (34–72.5°N, -31.5–40.5°E) — validation error
- Malformed input JSON — schema validation failure
- Payment failure via x402 protocol — call not executed

## 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 Slovenia; results outside it are rejected before payment.

## Output

A numeric mean soil pH value (in H2O) for the 0–5 cm topsoil layer at the requested coordinate, derived from SoilGrids data. Returns an error or rejection if the coordinate falls outside Slovenia's Natural Earth 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-slovenia-soil-ph-0-5-cm-5a8e4e39/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)