# HALOWERK Nordic Land – Norway Clay Fraction (0-5 cm)

> HALOWERK Nordic Land – Norway Clay 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 clay fraction for the 0–5 cm topsoil layer at a given coordinate, validated against Norway's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-soil-clay
- 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-norway-clay-fraction-0-5-cm-0fdc6923
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DdMRicoo4Xyfv6e6MqSJl

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-norway-clay-fraction-0-5-cm-0fdc6923 -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 5 cm of soil at latitude 59.91 and longitude 10.75 in Norway?

## When to prefer this

Choose this endpoint when you need Norway-specific topsoil clay fraction data from SoilGrids for a single coordinate. It is ideal when boundary validation (only Norway) is required before incurring cost, and when you specifically need the clay component of soil texture rather than sand, silt, pH, or composite USDA texture class — all of which are separate sibling endpoints on the same provider.

## Known failure modes

- Coordinate outside Norway boundary: rejected before payment with a geographic validation error
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation failure
- No SoilGrids data available for remote or ocean-adjacent coordinates: may return null or error
- Malformed input (non-numeric coordinates): returns a 400-level validation error

## How this service works

Mean SoilGrids clay fraction 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

Returns the mean clay fraction (as a proportion or percentage) for the 0–5 cm depth interval at the queried WGS84 coordinate, sourced from SoilGrids global soil data. The coordinate is pre-validated against Norway's Natural Earth boundary; requests outside Norway are rejected before any payment is charged.

## 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-norway-clay-fraction-0-5-cm-0fdc6923/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)