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

> HALOWERK Eastern Land – Romania Soil Sand 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 sand fraction for the 0-5 cm soil layer at a given coordinate within Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-soil-sand
- 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-sand-fraction-0-5-cm-9e5a35cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vfPWjLZCpahgbqUvx-UQr

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-sand-fraction-0-5-cm-9e5a35cc -d '<json body>'
```

Example prompt: What's the mean sand fraction in the top 5 cm of soil at latitude 44.43 and longitude 26.10 in Romania? I need the SoilGrids value for that point.

## When to prefer this

Choose this endpoint when you need point-level mean soil sand fraction data specifically for locations within Romania, with built-in boundary validation ensuring you only pay for valid in-country coordinates. Prefer this over generic SoilGrids API calls when you want a pre-validated, metered microservice with x402 micropayment support and automatic rejection of out-of-bounds coordinates.

## Known failure modes

- Coordinate outside Romania boundary: request rejected before payment with a validation error
- Coordinate within European bounding box but outside Romania: rejected by Natural Earth boundary check
- Malformed latitude/longitude values: schema validation error
- Latitude or longitude outside European coverage range (lat 34–72.5, lon -31.5–40.5): rejected
- Service unavailable or upstream SoilGrids data missing: server error response
- Insufficient USDC balance or x402 payment failure: payment error before data is returned

## How this service works

Mean SoilGrids sand 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 value representing the mean sand fraction (likely as g/kg or percentage) for the 0-5 cm soil depth at the queried coordinate, sourced from SoilGrids. Coordinates outside Romania's boundary are rejected before any charge is incurred.

## 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-sand-fraction-0-5-cm-9e5a35cc/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)