# HALOWERK Southern Land – Greece Soil pH (0-5 cm)

> HALOWERK Southern Land – Greece Soil pH (0-5 cm) is a paid API for AI agents from suedland.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 coordinate within Greece, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/gr-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-southern-land-greece-soil-ph-0-5-cm-de2ec8c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fQV8b8Uvy-PT1Y4A-yEW5

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-southern-land-greece-soil-ph-0-5-cm-de2ec8c4 -d '<json body>'
```

Example prompt: What's the soil pH in H2O for the 0-5 cm layer at latitude 37.97, longitude 23.73 in Greece?

## When to prefer this

Choose this endpoint when you need point-level topsoil pH data specifically for locations within Greece and want a paid-per-call, boundary-validated service that rejects invalid coordinates before charging. Ideal for agricultural site analysis, land evaluation, or soil suitability workflows focused on Greek territory. Prefer this over generic soil APIs when Greece-boundary enforcement and SoilGrids data provenance are required.

## Known failure modes

- Coordinate outside Greece boundary — rejected before payment is processed
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing coordinate fields — request error
- SoilGrids data unavailable for the specific location — null or error response

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

## Output

A numeric mean soil pH value (pH in H2O scale) from SoilGrids for the 0–5 cm topsoil layer at the queried Greek coordinate. Returns an error or rejection if the coordinate falls outside the validated Natural Earth boundary for Greece.

## 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-southern-land-greece-soil-ph-0-5-cm-de2ec8c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)