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

> HALOWERK Nordic Land — Denmark Soil Silt 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 2026-09-15).

Returns the mean SoilGrids silt fraction for the 0-5 cm depth layer at a given WGS84 coordinate validated to be within Denmark's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-soil-silt
- 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-denmark-soil-silt-fraction-0-5-cm-50a725de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UDE1xTJIjv2zJnJGvS5jP

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-silt-fraction-0-5-cm-50a725de -d '<json body>'
```

Example prompt: What's the mean soil silt fraction in the top 5 cm at latitude 55.676 and longitude 12.568 in Denmark?

## When to prefer this

Choose this endpoint when you specifically need the SoilGrids silt fraction for the 0-5 cm topsoil layer at a point coordinate within Denmark. It is ideal for soil texture analysis pipelines alongside companion endpoints for sand, clay, pH, and organic carbon. Prefer it over generic soil APIs when Denmark-specific boundary validation and per-call micropayment (x402) pricing are acceptable constraints.

## Known failure modes

- Coordinate outside Denmark boundary — rejected before payment is processed
- Latitude or longitude out of accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Coordinate within Europe but outside Denmark — rejected by boundary check
- Malformed or missing latitude/longitude fields — input validation error
- SoilGrids data unavailable for the requested location — possible null or error response

## How this service works

Mean SoilGrids silt 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

A numeric value representing the mean silt fraction (likely as a percentage or g/kg proportion) for the 0-5 cm soil depth at the queried coordinate, sourced from SoilGrids. Returns an error or rejection if the coordinate falls outside Denmark's Natural Earth 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-denmark-soil-silt-fraction-0-5-cm-50a725de/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)