# Services from geo.halowerk.com on Zero

> geo.halowerk.com serves 10 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/geo.halowerk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/geo.halowerk.com/health.json

## Services

- [S2 Cell Token Generator](https://www.zero.xyz/c/s2-cell-token-generator-f9849166/llms.txt): $0.004/call via x402. Converts a geographic coordinate (lat/lon) and S2 level to an S2 cell token using the S2 geometry library
- [geo.halowerk.com H3 Cell Operations](https://www.zero.xyz/c/geo-halowerk-com-h3-cell-operations-3af0f30b/llms.txt): $0.003/call via x402. Creates H3 cells from coordinates, finds neighbors, or changes cell resolution using Uber's H3 hierarchical hexagonal geospatial indexing system
- [Geo Halowerk Line Simplify (Ramer-Douglas-Peucker)](https://www.zero.xyz/c/geo-halowerk-line-simplify-ramer-douglas-peucker-b9262a64/llms.txt): $0.004/call via x402. Simplifies a planar polyline using the Ramer-Douglas-Peucker algorithm, reducing point count while preserving shape within a given tolerance.
- [Halowerk Geo Distance & Bearing](https://www.zero.xyz/c/halowerk-geo-distance-bearing-9abcb105/llms.txt): $0.004/call via x402. Calculates the WGS84 great-circle distance and initial bearing between two geographic coordinates
- [Geo Halowerk Point-in-Polygon](https://www.zero.xyz/c/geo-halowerk-point-in-polygon-56842f93/llms.txt): $0.004/call via x402. Tests whether a planar 2D point lies inside a polygon using the even-odd rule, returning a boolean containment result.
- [geo.halowerk.com WGS84 to MGRS Converter](https://www.zero.xyz/c/geo-halowerk-com-wgs84-to-mgrs-converter-a844445c/llms.txt): $0.004/call via x402. Converts WGS84 latitude/longitude coordinates to Military Grid Reference System (MGRS) notation using the open mgrs library, with configurable precision.
- [Geohash Encode/Decode](https://www.zero.xyz/c/geohash-encode-decode-3b37bbc6/llms.txt): $0.003/call via x402. Encodes a WGS84 coordinate into a geohash string at a specified precision, or decodes a geohash string back to its bounding box.
- [geo.halowerk.com BBox Tiles Enumerator](https://www.zero.xyz/c/geo-halowerk-com-bbox-tiles-enumerator-07b2bdb3/llms.txt): $0.004/call via x402. Enumerates all XYZ tile coordinates (z/x/y) that intersect a given WGS84 bounding box at a specified zoom level
- [Halowerk Polygon Area & Centroid Calculator](https://www.zero.xyz/c/halowerk-polygon-area-centroid-calculator-c36785fd/llms.txt): $0.004/call via x402. Calculates the planar area and centroid of a polygon defined by a sequence of (x, y) coordinate pairs in caller-declared units
- [geo.halowerk.com CRS Transform](https://www.zero.xyz/c/geo-halowerk-com-crs-transform-28f36bbb/llms.txt): $0.003/call via x402. Converts geographic coordinates between EPSG:4326 (WGS84 lat/lon) and EPSG:3857 (Web Mercator) using declared formulas

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)