# HALOWERK Central Land – Slovakia Soil Organic Carbon (0-5 cm)

> HALOWERK Central Land – Slovakia Soil Organic Carbon (0-5 cm) is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).

Returns the mean SoilGrids organic carbon content for the 0–5 cm topsoil layer at a given coordinate, restricted to points within Slovakia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/sk-soil-organic-carbon
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-slovakia-soil-organic-carbon-0-5-cm-97a98d30
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zc8WbaaZcawbpOcnAD9ps

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-central-land-slovakia-soil-organic-carbon-0-5-cm-97a98d30 -d '<json body>'
```

Example prompt: What's the mean soil organic carbon in the top 5 centimeters at latitude 48.1486 and longitude 17.1077 in Slovakia?

## When to prefer this

Choose this endpoint when you need point-level soil organic carbon data specifically for locations within Slovakia, sourced from SoilGrids. Ideal for agricultural analysis, environmental research, land management, or carbon accounting workflows where Slovakia-scoped data suffices. The built-in boundary validation ensures you are only charged for valid in-country queries.

## Known failure modes

- Coordinate outside Slovakia boundary: request rejected before payment with a boundary validation error
- Coordinate within European coverage range but outside Slovakia polygon: rejected
- Missing or malformed latitude/longitude: request returns a validation error
- Coordinate on border edge cases may be ambiguous and rejected conservatively
- Payment failure via x402 protocol: call not executed

## How this service works

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

## Output

A numeric value representing the mean soil organic carbon content (likely in g/kg or dg/kg per SoilGrids convention) for the 0–5 cm depth layer at the requested coordinate, as derived from the SoilGrids dataset. The endpoint rejects coordinates falling outside Slovakia's Natural Earth boundary before processing or charging.

## 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-central-land-slovakia-soil-organic-carbon-0-5-cm-97a98d30/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)