# HALOWERK Nordic Land – Sweden Topsoil Sand Fraction

> HALOWERK Nordic Land – Sweden Topsoil Sand Fraction 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 sand fraction (%) for the 0–5 cm soil layer at a given coordinate within Sweden, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/se-soil-sand
- 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-topsoil-sand-fraction-127ffd58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qk-Ql3DMuvum6WUZS4omD

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-topsoil-sand-fraction-127ffd58 -d '<json body>'
```

Example prompt: What's the mean topsoil sand fraction at latitude 59.33 longitude 18.07 in Sweden? I need the SoilGrids 0-5 cm sand percentage for that point.

## When to prefer this

Use this endpoint when you need a single-point SoilGrids sand fraction value specifically for a location in Sweden, with built-in geographic validation ensuring the coordinate is within Sweden before charging. Prefer this over generic soil APIs when working within the Nordic region and needing fast, cheap per-point lookups at $0.004/call with x402 micropayment support.

## Known failure modes

- Coordinate outside Sweden's Natural Earth boundary — request rejected with a geographic validation error before payment
- Coordinate within European bounding box but outside Sweden — rejected at boundary check
- Invalid latitude/longitude values outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Network or upstream SoilGrids data unavailability — service error response
- Payment failure via x402 protocol — transaction not completed

## How this service works

Mean SoilGrids sand 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

Returns the mean sand fraction (as a percentage or fraction) of the 0–5 cm soil layer at the queried coordinate, sourced from SoilGrids. The coordinate must fall within Sweden's Natural Earth boundary or the request is rejected before any 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-topsoil-sand-fraction-127ffd58/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)