# HALOWERK Eastern Land – Romania Built-Up Share

> HALOWERK Eastern Land – Romania Built-Up Share is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the share of ESA WorldCover 2021 pixels classified as built-up for a given coordinate within Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-built-up-share
- Price: $0.003/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-built-up-share-9715b239
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QPAtvOMelsu0BrhoCc9eO

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-built-up-share-9715b239 -d '<json body>'
```

Example prompt: What share of the land around latitude 44.4268, longitude 26.1025 in Romania is classified as built-up according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you specifically need the ESA WorldCover 2021 built-up land cover share for a point in Romania validated against official boundaries. Prefer it over generic geospatial APIs when you need authoritative satellite-derived urban classification at pixel resolution for Romanian territory, and when the x402 micropayment model is acceptable for per-call pricing.

## Known failure modes

- Coordinate outside Romania boundary — rejected before payment with an error indicating the point falls outside the validated Natural Earth boundary
- Coordinate outside the broader European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing or malformed latitude/longitude input — request validation failure
- No WorldCover data available for the exact point — may return null or zero share
- Service unavailability or upstream ESA data issue — HTTP 5xx error

## How this service works

Share of ESA WorldCover 2021 pixels classified as built-up. The coordinate is validated against the Natural Earth boundary for Romania; results outside it are rejected before payment.

## Output

A numeric value representing the fraction (share) of ESA WorldCover 2021 pixels classified as built-up at the requested coordinate within Romania, validated against the Natural Earth Romania boundary before returning results.

## 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-built-up-share-9715b239/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)