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Suverse Sidereal Time API (USNO Proxy)
x402
Suverse Sidereal Time API (USNO Proxy) is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns Greenwich and local apparent and mean sidereal time (GAST, GMST, LAST, LMST) for a given date, time, and geographic location via a keyless US Naval Observatory API proxy.
Price / call$0.001
Success—
StatusUnknown
How this service works
Greenwich and local apparent and mean sidereal time (GAST, GMST, LAST, LMST) for a date, time and location. Keyless US Naval Observatory API. For astronomy agents.
Output
Returns the four standard sidereal time values — Greenwich Apparent Sidereal Time (GAST), Greenwich Mean Sidereal Time (GMST), Local Apparent Sidereal Time (LAST), and Local Mean Sidereal Time (LMST) — for the specified date, time, and geographic coordinates, sourced from the US Naval Observatory.
Example use cases
Telescope session sidereal planning
“I'm setting up my telescope at latitude 51.5° N, longitude 0.1° W tonight — can you get me the local apparent and mean sidereal time for 2025-08-01 at 21:00 UTC so I know when objects cross my meridian?”
Astrophotography target scheduling
“I need to schedule a deep-sky imaging run at my observatory (36.4° N, 105.5° W). Can you calculate the LAST and LMST for 2025-09-10 at 03:00 UTC so I can plan which targets will be at transit?”
Astronomy education sidereal demo
“Can you show me the Greenwich apparent and mean sidereal time for midnight UTC on the spring equinox 2025 (March 20, 2025 at 00:00 UTC)? I want to explain GAST vs GMST to my students.”
Technical details
Endpoint
POSThttps://proxy.suverse.io/v1/data/suverse-space-sidereal-timeWhen to prefer
Choose this endpoint when you need authoritative sidereal time values (GAST, GMST, LAST, LMST) from the US Naval Observatory without requiring your own USNO API key. It is ideal for astronomy agents, telescope control systems, and observational planning tools that need precise, official sidereal time data for any location and time, especially when avoiding key management overhead.
Side effects
- Missing or malformed date/time input — API returns error indicating required fields
- Invalid or out-of-range coordinates — may return error or unexpected results
- USNO upstream outage — proxy may return 5xx or timeout
- Payment failure (x402) — call rejected if USDC micropayment not processed
- Incorrect bodyType or method — schema validation error returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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