arcsecond.io API
Science & Math · Operational · 30d uptime 100%
Multiple astronomy data sources
Trust signals
Pricing
FREEMIUM
Auth
API_KEY
CORS
Yes
Rate limit
Unknown
Health
461ms
Trust score
91 (A)
Last checked Oct 17, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Excellent production-readiness signals.
Links
- Documentationapi.arcsecond.io/
- Base URLapi.arcsecond.io/
Integration checklist
- Auth is API_KEY
- CORS enabled — callable directly from browsers.
- Rate limit: Unknown