# HALOWERK Baltic Land – Lithuania Clay Fraction (0–5 cm)

> HALOWERK Baltic Land – Lithuania Clay Fraction (0–5 cm) is a paid API for AI agents from baltikum.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 soil layer at a given WGS84 coordinate within Lithuania.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lt-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-baltic-land-lithuania-clay-fraction-0-5-cm-f218a447
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rj6x7N8WmgcQaS4lHFWMb

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-baltic-land-lithuania-clay-fraction-0-5-cm-f218a447 -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 5 cm of soil at latitude 54.6872, longitude 25.2797 in Lithuania?

## When to prefer this

Choose this endpoint when you need point-level topsoil clay fraction data specifically for locations within Lithuania, sourced from the authoritative SoilGrids dataset. It is ideal for agricultural analysis, geotechnical screening, or environmental research at Lithuanian coordinates. Prefer it over generic soil APIs when Lithuania-specific boundary enforcement and SoilGrids provenance are required. Use sibling endpoints on the same host for other soil properties (sand, bulk density, coarse fragments) or terrain metrics at the same location.

## Known failure modes

- Coordinate outside Lithuania boundary — rejected before payment, returns error indicating out-of-coverage
- Coordinate within the European bounding box but outside Lithuania — boundary validation fails
- Missing or malformed latitude/longitude — schema validation error
- Latitude or longitude out of the European coverage range (lat 34–72.5, lon −31.5–40.5) — rejected at input validation
- Service unavailability — upstream SoilGrids data temporarily inaccessible

## How this service works

Mean SoilGrids clay fraction for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Lithuania; results outside it are rejected before payment.

## Output

A numeric value representing the mean clay fraction (in g/kg or percentage, derived from SoilGrids) for the 0–5 cm topsoil layer at the specified coordinate. The coordinate is first validated against Lithuania's Natural Earth boundary; coordinates outside Lithuania are rejected before any result or charge is returned.

## 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-baltic-land-lithuania-clay-fraction-0-5-cm-f218a447/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)