# HALOWERK Eastern Land – Romania Tree Cover Share

> HALOWERK Eastern Land – Romania Tree Cover 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 tree cover for a given coordinate within Romania.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-tree-cover-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-tree-cover-share-220878be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Dg-SyaY1FSKhYaYxjjyIH

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-tree-cover-share-220878be -d '<json body>'
```

Example prompt: What share of tree cover does ESA WorldCover 2021 show at latitude 45.7, longitude 25.3 in Romania — give me the fraction as a decimal.

## When to prefer this

Choose this endpoint when you specifically need ESA WorldCover 2021 tree cover share data for a point coordinate within Romania. It is purpose-built for Romania with boundary validation that prevents wasted calls for out-of-scope coordinates. Prefer it over generic land-cover APIs when you need pay-per-call pricing ($0.003 USDC), Romania-specific validation, and WorldCover 2021 classification provenance. Use sibling endpoints on the same host for other Romanian land attributes (soil, elevation, slope, runoff).

## Known failure modes

- Coordinate outside Romania boundary: request rejected before payment, no result returned
- Latitude or longitude out of published European range (lat 34–72.5, lon -31.5–40.5): validation error
- Malformed JSON body or missing required fields: 400-level error
- Payment failure or insufficient USDC balance: request not processed
- Network timeout or service unavailability: 5xx error

## How this service works

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

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels at the queried coordinate classified as tree cover, after validating that the coordinate falls within Romania's Natural Earth boundary. Requests outside Romania are rejected before any charge is applied.

## 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-tree-cover-share-220878be/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)