Free
$0/month
Testing & evaluation
- 500 normal API requests / month
- 39 live standard endpoints, including documented betas
- No Nakshatra Timeline access
R231 is live: 77 standard calculations plus the Pro Nakshatra Timeline are available, with the 500-request Free allowance and globally serial durable jobs.
Tropical and sidereal chart calculations on every plan. Choose the monthly usage your application needs.
$0/month
Testing & evaluation
$9.99/month
Small apps
$19.99/month
Production & research
Production includes 51 standard calculation endpoints on all plans, including the documented betas. Pro also unlocks the separate Nakshatra Timeline endpoint, for 52 endpoints in total. Paid plans increase allowances; existing prices and subscriptions are unchanged.
Calculate birth charts, houses, aspects, transits and synastry; use beta relocation charts, bounded astrocartography and global eclipse geometry, hourly electional filtering, structured horoscope signals, chart SVGs, twenty-four Vargas from D1 through D150, Vimshottari with optional Pratyantardasha depth 3 and Sookshma depth 4, instant Panchang, Ashtakoota, Ashtakavarga with opt-in reductions and pindas, composites, uncorrected Davison charts, secondary progressions, solar arcs, lunar nodes and solar/lunar returns, and bounded planetary-event searches. Beta status and method-specific limits still apply.
/api/astro/birth-chart/api/astro/aspects/api/astro/houses/api/astro/transits/api/astro/synastry/api/astro/horoscope/api/astro/natal-svg/api/astro/vargas/api/astro/vimshottari/api/astro/davison/api/astro/composite/api/astro/panchang/api/astro/ashtakoota/api/astro/ashtakavarga/api/astro/numerology/api/astro/secondary-progressions/api/astro/varga-svg/api/astro/lunar-nodes/api/astro/solar-arcs/api/astro/moon-phases/api/astro/planetary-events/api/astro/house-ingresses/api/astro/aspect-windows/api/astro/returns/api/astro/event-calendar/api/astro/event-rule-search/api/astro/convention-compare/api/astro/chart-input-readiness/api/astro/house-system-readiness/api/astro/house-placement-stability/api/astro/aspect-policy-stability/api/astro/house-boundary-proximity/api/astro/location-precision-audit/api/astro/location-transition-scan/api/astro/chart-uncertainty-envelope/api/astro/chart-robustness/api/astro/civil-time-audit/api/astro/synastry-svg/api/astro/transit-svg/api/astro/natal-report/api/astro/birth-time-sensitivity/api/astro/fixed-stars/api/astro/relocation-chart/api/astro/astrocartography/api/astro/eclipse-geometry/api/astro/electional-search/api/astro/natal-analysis/api/astro/planetary-hours/api/astro/place-search/api/astro/timezone-resolve/api/astro/natal-contextEach admitted standard request uses one standard unit, including a depth-3 Vimshottari response. Timeline calls use the separate Pro allowance: 1,000 units per UTC calendar month, one unit per admitted request, with a maximum interval of 180 days. Later errors or timeouts still consume reserved usage. Monthly quotas are separate from short-term rate/concurrency limits.
Opt-in mean Naibod solar arcs, Parashari graha drishti, eclipse observer snapshots, and text-only HTML report co-branding use the same route access and one-standard-unit accounting as their existing endpoints. They are included in every current plan; no new price or add-on applies.
Supported sidereal options are Lahiri, Raman, Krishnamurti, Fagan–Bradley, Yukteshwar, Sassanian, True Chitra, True Revati, True Pushya, Galactic Center at 0 Sagittarius, and Galactic Alignment/Mardyks. The six-star-only CC0 beta is included; asteroid and minor-body calculations are not offered. Natal analysis returns configured geometry without interpretation. Planetary hours use unequal sunrise-based intervals without electional advice. Relocation and astrocartography return bounded calculation data without interpretations, map tiles, rankings, or recommendations. Global eclipse geometry offers an optional snapshot at global maximum but excludes local maxima, contacts, visibility searches, paths and maps. Electional results are fixed hourly samples, not continuous guarantees, rankings or advice. The planetary-events beta searches bounded ingresses, stations and exact major aspects. The house-ingresses beta searches transit crossings of fixed Equal or Whole Sign reference cusps; it is not a moving-house calculation. The aspect-windows beta returns exact-hit-anchored orb intervals and optional iCalendar text. The separate Moon-phase beta provides phase sectors, illuminated fraction and bounded primary-phase calendars. Instant Panchang and lunar returns remain separate calculations; crescent visibility is not modeled.
Note: Developer and Pro are monthly subscriptions processed securely by Stripe and charged in advance. They automatically renew for successive one-month periods until canceled. Cancel before renewal through the billing portal; if the portal is unavailable, email support@cosmicephemeris.com from the account address. Ordinary cancellation takes effect at the end of the paid period. No free trial or automatic usage-overage billing applies unless checkout expressly says otherwise. Taxes, when applicable, are shown during checkout. Payments are non-refundable except where required by law.
Developer uses the internal plan identifier basic in API responses.
Each Nakshatra Timeline interval is limited to 180 days.
Read the API limits and subscription terms before subscribing.