# HALOWERK Nordic Land — Soil pH (0–5 cm, Norway)

> HALOWERK Nordic Land — Soil pH (0–5 cm, Norway) is a paid API for AI agents from nordland.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, validated against Norway's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-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-nordic-land-soil-ph-0-5-cm-norway-bfaf55d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZejUEm3HlCHlyr2xEt0eh

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-nordic-land-soil-ph-0-5-cm-norway-bfaf55d1 -d '<json body>'
```

Example prompt: What's the soil pH in the top 5 cm at latitude 59.91 and longitude 10.75 in Norway? I need the SoilGrids H2O pH reading for that spot.

## When to prefer this

Choose this endpoint when you need point-level, Norway-specific soil pH derived from SoilGrids for the shallow 0–5 cm layer. It is ideal when Norway boundary validation is required before incurring cost (payment is blocked for out-of-bounds coordinates). Prefer it over generic global soil APIs when you specifically need Norway-scoped data with a built-in geographic guardrail.

## Known failure modes

- Coordinate outside Norway's Natural Earth boundary — request rejected before payment
- Latitude or longitude out of the European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Coordinate on water or outside mapped SoilGrids coverage — may return null or no-data value
- Malformed input (non-numeric coordinates) — input schema validation error

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

## Output

A numeric mean soil pH value (H2O scale) for the 0–5 cm depth layer at the submitted coordinate, sourced from SoilGrids global predictions, returned only if the coordinate falls within Norway's validated 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-nordic-land-soil-ph-0-5-cm-norway-bfaf55d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)