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geo.halowerk.com CRS Transform
x402
geo.halowerk.com CRS Transform is a paid API for AI agents from geo.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Converts geographic coordinates between EPSG:4326 (WGS84 lat/lon) and EPSG:3857 (Web Mercator) using declared formulas
Price / call$0.003
Success—
StatusUnknown
How this service works
Transforms coordinates between EPSG:4326 and EPSG:3857 with declared formulas. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age.
Output
Returns the reprojected x and y coordinates in the target CRS, along with a disclosure of the transformation formula used. Any fields that could not be computed are returned as null and listed in an unavailable_fields array. Source-backed values include source, time window, and age metadata.
Example use cases
Web map tile layer integration
“I have a GPS point at longitude -122.4194 and latitude 37.7749 in EPSG:4326 — can you convert it to EPSG:3857 so I can overlay it on a Web Mercator tile layer?”
GIS data pipeline reprojection
“My GIS dataset has Web Mercator coordinates x=2504688.54 and y=5193445.01 in EPSG:3857 — transform them back to EPSG:4326 latitude/longitude for me.”
Mapping app coordinate normalization
“I need to reproject a point at x=0.1278 longitude and y=51.5074 latitude from WGS84 (EPSG:4326) into Web Mercator (EPSG:3857) for my OpenStreetMap-based application.”
Technical details
Endpoint
POSThttps://geo.halowerk.com/v1/crs-transformWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-use CRS transformation between EPSG:4326 and EPSG:3857 with full transparency about the formula used. Ideal for agents working in geospatial pipelines that need auditable, disclosed conversion methods rather than a black-box transform. Prefer over general-purpose GIS libraries when you want a hosted, stateless API with clear provenance metadata on each result.
Side effects
- Coordinates outside valid range (-1e9 to 1e9) rejected with validation error
- Invalid or unsupported EPSG codes (only 4326 and 3857 accepted) return an error
- Attempting to transform from and to the same EPSG code may return identity or an error
- Missing required fields (x, y, from_epsg, to_epsg) result in a 400-level error
- Payment not provided or insufficient USDC results in a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| x | number | |
| y | number | |
| to_epsg | integer | |
| from_epsg | integer |
Tags
x402
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