# HALOWERK Eastern Land – Romania Soil Clay Fraction (0-5 cm)

> HALOWERK Eastern Land – Romania Soil Clay Fraction (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 the mean SoilGrids clay fraction for the 0–5 cm soil layer at a given WGS84 coordinate validated against Romania's boundary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-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-eastern-land-romania-soil-clay-fraction-0-5-cm-dff5be27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eSoUYktl99OigqOPTKgSs

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-romania-soil-clay-fraction-0-5-cm-dff5be27 -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 5 cm of soil at latitude 44.4268, longitude 26.1025 in Romania?

## When to prefer this

Choose this endpoint when you need authoritative SoilGrids clay fraction data specifically for points within Romania at the 0–5 cm surface layer depth, and you need built-in boundary validation to avoid out-of-range results. It is ideal for agricultural analysis, land use planning, or environmental research workflows that focus on Romanian territory and require per-call pay-as-you-go access without a subscription.

## Known failure modes

- Coordinate outside Romania's Natural Earth boundary — request rejected before payment, no result returned
- Latitude or longitude outside the European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing or malformed latitude/longitude input — 400-level error
- SoilGrids data unavailable or no-data value for the given coordinate (e.g. water body or unmapped area)
- Payment failure via x402 protocol — request not processed

## How this service works

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

## Output

A numeric mean clay fraction value (likely expressed as g/kg or percentage) from the SoilGrids dataset for the 0–5 cm depth layer at the requested coordinate, validated to fall within Romania's Natural Earth boundary. Requests outside Romania are 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-eastern-land-romania-soil-clay-fraction-0-5-cm-dff5be27/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)