# HALOWERK Eastern Land – Croatia Water & Wetland Share

> HALOWERK Eastern Land – Croatia 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 2026-09-15).

Returns the combined share of permanent water, herbaceous wetland, and mangrove land-cover classes for a given coordinate within Croatia.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hr-water-wetland-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-croatia-water-wetland-share-3a8d34b5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s0K6uA4B59sZdUzG3FkZy

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-croatia-water-wetland-share-3a8d34b5 -d '<json body>'
```

Example prompt: What is the combined water, wetland, and mangrove land-cover share at latitude 45.3, longitude 14.8 — is this a water-dominated area in Croatia?

## When to prefer this

Use this endpoint when you need a precise, point-based water and wetland land-cover share specifically within Croatia, backed by ESA WorldCover 2021 classification. Prefer it over generic land-cover APIs when you need combined aquatic/wetland metrics at low cost per query and when Croatia-specific boundary validation is desirable to avoid erroneous out-of-country results.

## Known failure modes

- Coordinate outside Croatia boundary – rejected before payment, error indicating invalid location
- Latitude or longitude outside published European coverage range – schema validation error
- Missing required latitude or longitude fields – HTTP 400 bad request
- Network timeout or service unavailability – HTTP 5xx error

## How this service works

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

## Output

A numeric share (fraction or percentage) representing the combined ESA WorldCover 2021 area classified as permanent water, herbaceous wetland, and mangrove for the queried coordinate within Croatia. Coordinates outside the Natural Earth Croatia boundary are rejected before 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-croatia-water-wetland-share-3a8d34b5/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)