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Saylor Innovations Polygon Geometry Calculator
x402
Saylor Innovations Polygon Geometry Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).
Computes area (km², hectares, acres, sq miles), perimeter, centroid, and bounding box for a polygon defined by lat/lon vertices, with optional point-in-polygon test
Price / call$0.01
Success—
StatusUnknown
How this service works
Polygon area in km2, hectares, acres and square miles from lat,lon vertices, plus perimeter, centroid, bounding box and a point-in-polygon test
Output
Returns a JSON object with the polygon vertex count, area in km², hectares, acres, and square miles, perimeter in km and miles, planar centroid lat/lon, bounding box coordinates, and — if a test point was provided — an object containing the test lat/lon and a boolean indicating whether the point is inside the polygon. May also include source and note fields for context.
Example use cases
Farm field area measurement
“I have the GPS boundary of a farm field — vertices are 38.9500,-95.2500; 38.9520,-95.2480; 38.9510,-95.2460; 38.9490,-95.2470; 38.9485,-95.2495. Can you tell me the area in acres and hectares, and the perimeter in miles?”
Real estate parcel centroid lookup
“I need the centroid and bounding box for this property boundary: 34.0522,-118.2437; 34.0535,-118.2420; 34.0528,-118.2405; 34.0510,-118.2415; 34.0508,-118.2440. What are the coordinates of the center point?”
Point-in-polygon check for delivery zone
“Check whether the location 51.5074,-0.1278 is inside our delivery zone polygon with corners at 51.5100,-0.1350; 51.5120,-0.1200; 51.5050,-0.1180; 51.5030,-0.1320.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/geo/polygon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need geospatial polygon metrics — area, perimeter, centroid, bounding box — from raw lat/lon coordinate lists, especially when you also need a point-in-polygon containment test in the same call. It supports multiple area units (km², hectares, acres, sq miles) simultaneously, making it ideal for land surveying, property analysis, delivery zone verification, and GIS workflows where you don't want to spin up a full GIS library.
Side effects
- Fewer than 3 vertices provided — polygon cannot be formed
- Malformed points string (wrong separator or missing coordinate) — parse error
- Points string exceeds 500 vertices — rejected
- Invalid lat/lon values (out of range) — computation error
- Missing required 'points' query parameter — 400 bad request
- Payment not processed — 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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