# HALOWERK Baltic Land – Estonia Soil Clay Fraction (0-5 cm)

> HALOWERK Baltic Land – Estonia Soil 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 topsoil layer at a given coordinate within Estonia.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/ee-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-estonia-soil-clay-fraction-0-5-cm-39cc2ceb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uIriZRo9wQCaMKuMRfKeq

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-estonia-soil-clay-fraction-0-5-cm-39cc2ceb -d '<json body>'
```

Example prompt: What's the SoilGrids clay fraction in the top 5 cm of soil at latitude 58.37, longitude 26.73 in Estonia?

## When to prefer this

Choose this endpoint when you need point-level soil clay fraction specifically for locations within Estonia, particularly when working with SoilGrids-derived topsoil (0–5 cm) data. It is ideal for agricultural assessment, land-use modeling, or environmental enrichment pipelines targeting Estonian coordinates. Prefer it over generic soil APIs when you need Estonia-specific boundary validation and micropayment-compatible access via x402.

## Known failure modes

- Coordinate outside Estonia boundary: request rejected before payment, returns error indicating out-of-bounds
- Coordinate outside the broader European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation error
- Missing latitude or longitude: returns validation error
- SoilGrids data unavailable for remote or coastal edge coordinates: may return null or error response

## How this service works

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

## Output

A numeric value representing the mean clay fraction (as a percentage or volumetric fraction) of the 0–5 cm topsoil layer at the specified Estonian coordinate, derived from SoilGrids data. Requests with coordinates outside Estonia's Natural Earth boundary are rejected before 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-baltic-land-estonia-soil-clay-fraction-0-5-cm-39cc2ceb/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)