# HALOWERK Nordic Land – Denmark Soil pH (0-5 cm)

> HALOWERK Nordic Land – Denmark Soil pH (0-5 cm) is a paid API for AI agents from nordland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).

Returns the mean SoilGrids pH in H2O for the 0-5 cm soil layer at a given WGS84 coordinate, validated to lie within Denmark's borders.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-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-nordic-land-denmark-soil-ph-0-5-cm-22f609cf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7qJs7E5kuxaehKAOhEmCg

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-denmark-soil-ph-0-5-cm-22f609cf -d '<json body>'
```

Example prompt: What's the SoilGrids topsoil pH (0-5 cm layer) at latitude 55.6761, longitude 12.5683 in Denmark?

## When to prefer this

Choose this endpoint when you need a point-level topsoil pH value specifically within Denmark, sourced from the standardised SoilGrids global dataset. It is ideal for precision agriculture, environmental assessments, or land suitability analyses where a single Danish coordinate's surface acidity is needed quickly and cheaply at $0.004 per call. Pair it with sibling endpoints on the same host for complementary soil properties (clay, sand, silt, organic carbon, texture class) without leaving the same API surface.

## Known failure modes

- Coordinate falls outside Denmark's Natural Earth boundary — request rejected with a geographic validation error before payment
- Coordinate within Europe bbox but outside Denmark — rejected at boundary check
- Invalid latitude/longitude values outside published European coverage range — schema validation error
- SoilGrids data unavailable or null for very coastal or border pixels — may return no-data response
- Network timeout or upstream SoilGrids service unavailability

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

## Output

A numeric mean pH value (H2O method) from SoilGrids for the 0-5 cm soil layer at the requested coordinate, validated to fall within Denmark's Natural Earth boundary. Requests outside Denmark 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-nordic-land-denmark-soil-ph-0-5-cm-22f609cf/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)