# HALOWERK Europe Land – Water & Wetland Share (1,000m Buffer)

> HALOWERK Europe Land – Water & Wetland Share (1,000m Buffer) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-14).

Returns the combined share of permanent water, herbaceous wetland, and mangrove land-cover classes within a 1,000-metre circular buffer around a given European coordinate, derived from ESA WorldCover 2021.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-water-wetland-share-buffer-1000m
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-water-wetland-share-1-000m-buffer-4d80c0a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ITi6JARjUbwNNLHsOH_dQ

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-europe-land-water-wetland-share-1-000m-buffer-4d80c0a9 -d '<json body>'
```

Example prompt: What's the combined water and wetland land-cover share within 1 kilometre of latitude 52.37, longitude 4.89 — somewhere in the Netherlands?

## When to prefer this

Choose this endpoint when you need a quantitative, standardized water and wetland land-cover fraction at the 1,000-metre neighborhood scale for any European location. It is ideal for environmental screening, ecological assessments, flood or hydrological risk pre-analysis, or any workflow requiring ESA WorldCover-derived hydrological coverage at a consistent spatial scale. Prefer the 250m sibling endpoint if you need finer local resolution; prefer this 1,000m endpoint when regional-scale hydrological context matters more than point-level precision.

## Known failure modes

- Coordinate outside European coverage bounds (latitude 34–72.5°N, longitude -31.5–40.5°E) returns an error or empty result
- Non-numeric or malformed latitude/longitude values cause a validation error
- Locations with no ESA WorldCover data (e.g. very small islands or coastal edges) may return null or zero
- Service timeout or HTTP 402 payment failure if USDC payment is not properly handled
- Border-zone coordinates may fall partially outside coverage, reducing buffer completeness

## How this service works

Combined share of permanent water, herbaceous wetland and mangrove classes. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A numeric value (or set of values) representing the combined fractional share — expressed in standardized units — of permanent water, herbaceous wetland, and mangrove ESA WorldCover 2021 pixels within the 1,000-metre circular neighborhood centered on the supplied coordinate. Coverage is limited to the 30 European countries in the dataset.

## 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-europe-land-water-wetland-share-1-000m-buffer-4d80c0a9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)