# HALOWERK Nordic Land — Denmark Soil Sand Fraction (0-5 cm)

> HALOWERK Nordic Land — Denmark Soil Sand Fraction (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 sand fraction (%) for the 0–5 cm soil layer at a given WGS84 coordinate validated against the Denmark boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-soil-sand
- 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-sand-fraction-0-5-cm-284889dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CXfJw3j4EzrwkPjRprdiJ

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-sand-fraction-0-5-cm-284889dd -d '<json body>'
```

Example prompt: What's the mean sand fraction in the top 5 cm of soil at latitude 55.67, longitude 12.56 in Denmark?

## When to prefer this

Choose this endpoint when you need a quick, paid, boundary-validated lookup of surface soil sand fraction specifically within Denmark, backed by SoilGrids data, without building your own geospatial pipeline. Prefer it over generic SoilGrids API access when you want automatic Denmark-boundary enforcement and per-call micropayment simplicity via x402.

## Known failure modes

- Coordinate outside Denmark boundary — request rejected with a validation error before payment
- Latitude or longitude outside the European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing required latitude or longitude parameter — request rejected with schema error
- SoilGrids data unavailable for sparse or coastal edge coordinates — may return null or error

## How this service works

Mean SoilGrids sand fraction 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

Returns the mean sand fraction value (as a percentage or fraction) for the 0–5 cm soil depth at the requested Danish coordinate, sourced from SoilGrids global soil data. Coordinates outside the validated Denmark boundary are rejected before any charge is incurred.

## 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-sand-fraction-0-5-cm-284889dd/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)