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Geo Geometry Analyzer
x402
Geo Geometry Analyzer is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Computes geometric properties of a GeoJSON Polygon, including bounding box, centroid, area, perimeter, and validity check.
Price / call$0.002
Success—
StatusUnknown
How this service works
Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.
Output
Returns a JSON object containing: bbox (array of [minX, minY, maxX, maxY]), valid (boolean indicating geometric validity), centroid ([longitude, latitude] of center point), area_deg2 (area in square degrees), and perimeter_deg (perimeter length in degrees).
Example use cases
Validate and measure a land parcel
“I have a GeoJSON polygon for a land parcel with coordinates [[[10.5,51.2],[10.7,51.2],[10.7,51.4],[10.5,51.4],[10.5,51.2]]] — can you check if it's a valid polygon and tell me its centroid, area, and bounding box?”
Find center point of a region boundary
“I've got a polygon outlining a city district and I need its centroid coordinates so I can place a map marker at the center — here are the polygon coordinates: [[[2.3,48.8],[2.4,48.8],[2.4,48.9],[2.3,48.9],[2.3,48.8]]]”
Compute polygon dimensions for coverage analysis
“Can you calculate the area and perimeter of this polygon in degree units and confirm it's geometrically valid? Coordinates are [[[100.0,13.7],[100.1,13.7],[100.1,13.8],[100.0,13.8],[100.0,13.7]]]”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/geo-geometry?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need quick, server-side computation of GeoJSON polygon properties (centroid, area, perimeter, bounding box, validity) without setting up a GIS library or account. Ideal for lightweight geospatial validation and measurement tasks where pay-per-call with no API key is preferred. Less suited for projections or complex coordinate system transformations.
Side effects
- Invalid or malformed GeoJSON polygon returns an error or valid:false
- Self-intersecting polygon may be flagged as invalid
- Missing or wrong geometry type (e.g. Point instead of Polygon) causes a 400-level error
- Payment not included or insufficient USDC triggers a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| geometry | Polygon |
Output
Schema · Response
{
"type": "json",
"example": {
"bbox": [
0,
0,
1,
1
],
"valid": true,
"centroid": [
0.5,
0.5
],
"area_deg2": 1,
"perimeter_deg": 4
}
}Tags
x402
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