# HALOWERK Nordic Land – Denmark Soil Bulk Density (0–5 cm)

> HALOWERK Nordic Land – Denmark Soil Bulk Density (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 bulk density for the 0–5 cm soil layer at a given WGS84 coordinate, validated to lie within Denmark's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/dk-soil-bulk-density
- 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-bulk-density-0-5-cm-040638ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b71qwA5eFivkzOZO4HwHU

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-bulk-density-0-5-cm-040638ec -d '<json body>'
```

Example prompt: What's the mean SoilGrids bulk density of the topsoil (0–5 cm) at latitude 55.6761, longitude 12.5683 in Denmark?

## When to prefer this

Choose this endpoint when you need point-level soil bulk density data specifically within Denmark and want automatic boundary validation to prevent out-of-range charges. Prefer it over generic SoilGrids API access when you need a pay-per-call micropayment model (x402) without managing SoilGrids credentials. It is the right choice for agents enriching agricultural, construction, or environmental datasets with topsoil physical properties for Danish locations.

## Known failure modes

- Coordinate outside Denmark boundary → rejected with a validation error, no charge incurred
- Latitude or longitude out of the declared European coverage range (lat 34–72.5, lon -31.5–40.5) → input validation error
- Malformed JSON body or missing required fields → 400-level error
- Temporary upstream SoilGrids data unavailability → 5xx error
- Payment failure (x402 protocol) → charge not completed, no result returned

## How this service works

Mean SoilGrids bulk density 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 bulk density value (typically in kg/dm³ or g/cm³) for the 0–5 cm soil horizon at the queried coordinate, sourced from SoilGrids data. Requests with coordinates outside Denmark's boundary 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-bulk-density-0-5-cm-040638ec/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)