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

> HALOWERK Southern Land – Malta Surface 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 (H2O) value for the 0–5 cm soil layer at a given coordinate within Malta's boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-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-malta-surface-soil-ph-0-5-cm-9165249c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YendAD2C7h2rTfy73k_Ai

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-malta-surface-soil-ph-0-5-cm-9165249c -d '<json body>'
```

Example prompt: What's the surface soil pH (top 5 cm) at latitude 35.9042, longitude 14.4189 in Malta? I need the SoilGrids mean pH in water for that point.

## When to prefer this

Choose this endpoint when you need SoilGrids-derived mean soil pH (H2O) specifically for a point location within Malta at the 0–5 cm depth layer. It is ideal for agricultural planning, land assessment, or environmental monitoring workflows focused on Malta where a pay-per-call micro-payment model is acceptable. Prefer this over full SoilGrids API access when you only need Malta-scoped single-point lookups at low cost.

## Known failure modes

- Coordinate outside Malta's Natural Earth boundary: request rejected before payment, no charge incurred
- Coordinate within European bounding box but outside Malta: rejected by boundary validation
- Missing or out-of-range latitude/longitude values: validation error
- Network or upstream SoilGrids data unavailability: service 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 Malta; results outside it are rejected before payment.

## Output

Returns the mean SoilGrids pH measured in H2O for the 0–5 cm topsoil layer at the requested coordinate. Coordinates outside Malta's Natural Earth boundary are rejected before payment is processed. The response is a numeric pH value representing surface soil acidity at that point.

## 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-malta-surface-soil-ph-0-5-cm-9165249c/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)