# HALOWERK Baltic Land – Estonia Grassland Share

> HALOWERK Baltic Land – Estonia Grassland Share 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 share of ESA WorldCover 2021 pixels classified as grassland for a given coordinate within Estonia.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/ee-grassland-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-estonia-grassland-share-bc3b3aa9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EbCYsf3V9yMR18_6SDTZV

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-estonia-grassland-share-bc3b3aa9 -d '<json body>'
```

Example prompt: What share of the land at 58.3771° N, 26.7290° E in Estonia is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you need a precise, satellite-derived grassland land cover fraction for a specific point within Estonia, sourced from ESA WorldCover 2021. It is ideal for agricultural assessment, ecological analysis, or land use studies requiring validated geospatial data with built-in boundary enforcement for Estonia. Prefer this over generic land cover APIs when you specifically need Estonia-scoped, pay-per-call grassland share data.

## Known failure modes

- Coordinate outside Estonia boundary: rejected before payment, error indicating invalid location
- Coordinate outside published European coverage bounds (lat 34–72.5, lon -31.5–40.5): validation error
- Missing latitude or longitude parameter: schema validation error
- Network or server error: HTTP 5xx response

## How this service works

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

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels classified as grassland within the analysis area centered on the provided coordinate. Coordinates outside Estonia's Natural Earth boundary are rejected before any charge is applied.

## 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-estonia-grassland-share-bc3b3aa9/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)