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HALOWERK Europe Land – Grassland Share (Parcel Polygon)
x402
HALOWERK Europe Land – Grassland Share (Parcel Polygon) 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 share of ESA WorldCover 2021 pixels classified as grassland within a user-supplied WGS84 polygon, covering 30 European countries.
Price / call$0.006
Success—
StatusUnknown
How this service works
Share of ESA WorldCover 2021 pixels classified as grassland. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.
Output
A standardized fractional or percentage value indicating the share of pixels within the supplied polygon classified as grassland in the ESA WorldCover 2021 dataset, consistent across all 30 covered European countries.
Example use cases
Agricultural subsidy eligibility check
“I need to know what percentage of this field is grassland before submitting our EU agri-environment scheme application — the parcel boundary is [[-0.45,52.10],[-0.44,52.10],[-0.44,52.11],[-0.45,52.11]]. Can you calculate the grassland share for me?”
Carbon credit land baseline assessment
“We're setting up a carbon sequestration project and need to establish the grassland baseline for our land parcel. The polygon vertices are [[18.5,47.3],[18.52,47.3],[18.52,47.32],[18.5,47.32]] — what fraction of that area is currently classified as grassland?”
Real estate land use due diligence
“Before we finalize the purchase of this plot in Poland, can you check what proportion of the land within these coordinates [[21.1,52.2],[21.12,52.2],[21.12,52.22],[21.1,52.22]] is grassland according to satellite land cover data?”
Technical details
Endpoint
POSThttps://euroland.halowerk.com/v1/europe-grassland-share-parcelWhen to prefer
Choose this endpoint when you need grassland land cover share for an irregular polygon boundary (e.g. a real cadastral parcel) rather than a fixed-radius circle. Use it over the circular-buffer grassland endpoint when parcel shape fidelity matters. It is well-suited for compliance, subsidy, or environmental audit workflows where exact parcel geometry is required across European countries covered by ESA WorldCover 2021.
Side effects
- Polygon outside supported European extent (lon -31.5 to 40.5, lat 34 to 72.5) returns an error
- Polygon with fewer than 3 vertices or more than 100 vertices is rejected
- Polygon span exceeding 0.25 degrees is rejected as too large
- Invalid coordinate format or out-of-range values cause validation failure
- Payment failure via x402 protocol prevents endpoint execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| polygon | array | WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees. |
Tags
x402
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