# HALOWERK Eastern Land – Hungary Soil Organic Carbon (0-5 cm)

> HALOWERK Eastern Land – Hungary Soil Organic Carbon (0-5 cm) is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns mean SoilGrids organic carbon content for the 0-5 cm soil layer at a given WGS84 coordinate within Hungary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-soil-organic-carbon
- 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-eastern-land-hungary-soil-organic-carbon-0-5-cm-80c5ac87
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m8SZfc1e4Xxq0gYCHuox4

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-eastern-land-hungary-soil-organic-carbon-0-5-cm-80c5ac87 -d '<json body>'
```

Example prompt: What's the mean soil organic carbon in the top 5 cm at latitude 47.49 and longitude 19.04 in Hungary? I need the SoilGrids value for that point.

## When to prefer this

Use this endpoint when you need point-level topsoil organic carbon data specifically for locations within Hungary, validated against the country boundary. Prefer this over generic SoilGrids API access when you want a low-cost, pre-validated single-point lookup with x402 micropayment support, especially in agent workflows processing Hungarian agricultural or environmental coordinates.

## Known failure modes

- Coordinate outside Hungary's Natural Earth boundary — request rejected before payment
- Latitude or longitude out of European coverage range (34–72.5°N, -31.5–40.5°E) — validation error
- Missing required latitude or longitude parameter — schema validation failure
- SoilGrids data unavailable for the queried location — no result returned

## How this service works

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

## Output

A numeric mean soil organic carbon value (g/kg or similar SoilGrids unit) for the 0-5 cm depth layer at the validated Hungarian coordinate. Coordinates outside Hungary's Natural Earth boundary are rejected before processing.

## 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-eastern-land-hungary-soil-organic-carbon-0-5-cm-80c5ac87/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)