# HALOWERK Baltic Land – Water & Wetland Share (Germany)

> HALOWERK Baltic Land – Water & Wetland Share (Germany) is a paid API for AI agents from baltikum.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 Germany, derived from ESA WorldCover 2021 data.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-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-baltic-land-water-wetland-share-germany-a25c2d66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PeTMfUTqOAjXb_RtqHGeY

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-baltic-land-water-wetland-share-germany-a25c2d66 -d '<json body>'
```

Example prompt: What's the combined share of permanent water, wetland, and mangrove land cover at latitude 53.55 and longitude 9.99 in Germany?

## When to prefer this

Choose this endpoint when you need a fast, paid-per-call lookup of water and wetland land-cover fractions specifically for a coordinate in Germany, backed by ESA WorldCover 2021 classifications. It is ideal for environmental screening, ecological assessments, land suitability analysis, or hydrology-related data enrichment pipelines where Germany-scoped coverage is sufficient and coordinate-level granularity is needed. Prefer it over generic GIS APIs when you want a single numeric share delivered instantly without managing raster datasets yourself.

## Known failure modes

- Coordinate outside Germany boundary — rejected before payment with a validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed request body — HTTP 400 with schema error
- Payment failure — x402 payment required response if USDC payment is not completed
- Service unavailable — HTTP 5xx if upstream land-cover dataset is temporarily inaccessible

## How this service works

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

## Output

A numeric share (fraction or percentage) representing the combined proportion of land pixels classified as permanent water, herbaceous wetland, or mangrove at the queried coordinate, validated against Germany's Natural Earth boundary. Requests outside Germany are rejected before any charge is made.

## 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-baltic-land-water-wetland-share-germany-a25c2d66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)