# HALOWERK Eastern Land – Hungary Water & Wetland Share

> HALOWERK Eastern Land – Hungary Water & Wetland Share is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Returns the combined fractional share of permanent water, herbaceous wetland, and mangrove land-cover classes at a given coordinate within Hungary, derived from ESA WorldCover 2021 data.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-water-wetland-share
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-eastern-land-hungary-water-wetland-share-06646e95
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HQ-9JmX7EA4bFYV232vBy

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-water-wetland-share-06646e95 -d '<json body>'
```

Example prompt: What's the combined water and wetland land-cover share at latitude 47.5, longitude 19.1 in Hungary — pull it from the HALOWERK Eastern Land water-wetland endpoint?

## When to prefer this

Choose this endpoint when you need ESA WorldCover 2021-derived water and wetland coverage statistics specifically for a point location within Hungary, particularly when boundary-validated results and micropayment-per-call pricing (x402) are acceptable. Prefer it over generic land-cover APIs when you need the combined permanent water + herbaceous wetland + mangrove share as a single metric and when Hungary-scoped validation is a feature rather than a limitation.

## Known failure modes

- Coordinate outside Hungary boundary: request rejected with validation error before payment
- Latitude or longitude out of European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation failure
- Invalid or malformed coordinate values: 400-level error
- Network or service downtime: timeout or 5xx error
- Payment failure via x402 protocol: request not processed

## How this service works

Combined share of permanent water, herbaceous wetland and mangrove classes. The coordinate is validated against the Natural Earth boundary for Hungary; results outside it are rejected before payment.

## Output

A numeric fraction (0–1 or percentage) representing the combined share of ESA WorldCover 2021 pixels classified as permanent water, herbaceous wetland, and mangrove within the analysis grid cell surrounding the requested coordinate. Requests outside the Hungary boundary 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-hungary-water-wetland-share-06646e95/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)