# HALOWERK Europe Land – Water & Wetland Share (250m Buffer)

> HALOWERK Europe Land – Water & Wetland Share (250m Buffer) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the combined share of permanent water, herbaceous wetland, and mangrove land-cover classes within a 250-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-250m
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-water-wetland-share-250m-buffer-365131d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ix3UuL5H8pBSSdLvYSOSP

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-250m-buffer-365131d4 -d '<json body>'
```

Example prompt: What share of the land within 250 metres of latitude 52.37, longitude 4.89 in the Netherlands is classified as water or wetland according to ESA WorldCover?

## When to prefer this

Choose this endpoint when you need a fine-grained, immediate wetland and water fraction score for a single European point at the 250-metre neighbourhood scale — ideal for site-level environmental assessments, property due diligence, or ecological scoring. Prefer this over the 1,000m buffer variant when hyperlocal precision matters, and over the polygon variant when only a point coordinate is available.

## Known failure modes

- Coordinates outside the European coverage bounding box (lat 34–72.5, lon -31.5–40.5) will return a validation error
- Non-numeric or malformed latitude/longitude values will cause a 400 Bad Request
- Points on the edge of coverage may return partial or zero values if the buffer extends outside the covered area
- Temporary service unavailability may return a 5xx error; retry after a short delay

## How this service works

Combined share of permanent water, herbaceous wetland and mangrove classes. The service evaluates a circular 250 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized numeric value (fraction or percentage) representing the combined share of ESA WorldCover 2021 pixels classified as permanent water, herbaceous wetland, or mangrove within a 250-metre circular buffer around the provided coordinate, applicable across 30 covered European countries.

## 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-250m-buffer-365131d4/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)