# HALOWERK Nordic Land – Sweden Soil Clay Fraction (0–5 cm)

> HALOWERK Nordic Land – Sweden Soil 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 depth layer at a given coordinate validated to fall within Sweden's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/se-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-sweden-soil-clay-fraction-0-5-cm-34e260b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SW1ZbfffW_zfo3HmR6aFs

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-sweden-soil-clay-fraction-0-5-cm-34e260b8 -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 0–5 cm of soil at latitude 59.85 and longitude 17.63 in Sweden? I need the SoilGrids clay percentage for that point.

## When to prefer this

Use this endpoint when you need SoilGrids clay fraction data specifically for a point location within Sweden and want built-in boundary validation to avoid erroneous lookups outside the country. Prefer this over generic soil APIs when you need reliable pay-per-call pricing with guaranteed Swedish geographic scoping.

## Known failure modes

- Coordinate outside Sweden boundary — rejected before payment with a boundary validation error
- Latitude or longitude out of the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Network or upstream SoilGrids data unavailability — service error response
- Malformed input (non-numeric coordinates) — input 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 Sweden; results outside it are rejected before payment.

## Output

A numeric value representing the mean SoilGrids clay fraction (as a percentage or volumetric fraction) for the 0–5 cm depth layer at the validated Swedish coordinate. Requests with coordinates outside Sweden's Natural Earth boundary are rejected before payment is processed.

## 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-sweden-soil-clay-fraction-0-5-cm-34e260b8/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)