# HALOWERK Nordic Land – Iceland Tree Cover Share

> HALOWERK Nordic Land – Iceland Tree Cover Share is a paid API for AI agents from nordland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the share of ESA WorldCover 2021 pixels classified as tree cover for a given WGS84 coordinate within Iceland.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/is-tree-cover-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-nordic-land-iceland-tree-cover-share-f4b01ae1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nD6h7jLWEBxOcdgwyuyBE

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-nordic-land-iceland-tree-cover-share-f4b01ae1 -d '<json body>'
```

Example prompt: What fraction of the area around latitude 64.1, longitude -21.9 in Iceland is classified as tree cover according to ESA WorldCover?

## When to prefer this

Use this endpoint when you need a precise, pixel-level tree cover share derived from ESA WorldCover 2021 specifically for a point in Iceland. Prefer it over generic land cover APIs when you need a standardized, satellite-derived 2021 baseline and are willing to pay per-call at $0.003 USDC via x402. It is especially suited for agentic workflows requiring automated geospatial land cover enrichment for Icelandic locations.

## Known failure modes

- Coordinate outside Iceland boundary — request rejected with geographic validation error before payment
- Coordinate outside published European coverage bounds (lat 34–72.5, lon -31.5–40.5) — rejected
- Invalid or missing latitude/longitude — schema validation error
- Payment failure via x402 protocol — request not processed
- Downstream ESA WorldCover data unavailability — service error

## How this service works

Share of ESA WorldCover 2021 pixels classified as tree cover. The coordinate is validated against the Natural Earth boundary for Iceland; results outside it are rejected before payment.

## Output

A numeric share (fraction or percentage) of ESA WorldCover 2021 pixels within the analysis area classified as tree cover, for the specified coordinate inside Iceland. Coordinates outside the Iceland boundary are rejected before payment is charged.

## 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-nordic-land-iceland-tree-cover-share-f4b01ae1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)