# Cosmic Ephemeris Calculations API

**Canonical:** https://apis.io/apis/cosmic-ephemeris/cosmic-ephemeris-calculations-api/  
**Provider:** Cosmic Ephemeris — https://apis.io/providers/cosmic-ephemeris/  
**Base URL:** https://api.cosmicephemeris.com  
**Documentation:** https://cosmicephemeris.com

Cosmic Ephemeris Calculations API is one of 3 APIs that [Cosmic Ephemeris](https://apis.io/providers/cosmic-ephemeris/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. Tagged areas include Calculations. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

The Calculations API from Cosmic Ephemeris — 76 operation(s) for calculations.

## Operations (60 of 76)

| Method | Path | Summary |
|---|---|---|
| POST | `/api/astro/numerology` | Calculate explicit Pythagorean numerology arithmetic |
| POST | `/api/astro/place-search` | Search a pinned self-hosted place catalog |
| POST | `/api/astro/timezone-resolve` | Resolve a selected place and historical local civil time |
| POST | `/api/astro/natal-context` | Build deterministic model-ready natal context |
| POST | `/api/astro/birth-chart` | Calculate a full birth chart |
| POST | `/api/astro/aspects` | Calculate natal aspects inside a full chart envelope |
| POST | `/api/astro/houses` | Calculate a selected house system |
| POST | `/api/astro/synastry` | Calculate two charts and cross-chart aspects |
| POST | `/api/astro/transits` | Calculate transits at one requested instant |
| POST | `/api/astro/natal-svg` | Render a natal SVG wheel |
| POST | `/api/astro/vargas` | Calculate twenty-four supported sidereal Vargas through D150 |
| POST | `/api/astro/vimshottari` | Calculate a natal Vimshottari cycle |
| POST | `/api/astro/ashtakoota` | Calculate bounded North-Indian Ashtakoota scores |
| POST | `/api/astro/ashtakavarga` | Calculate Bhinnashtakavarga and Sarvashtakavarga tables with optional reductions |
| POST | `/api/astro/composite` | Calculate a shortest-arc midpoint composite |
| POST | `/api/astro/panchang` | Calculate an instant Panchang and local solar events |
| POST | `/api/astro/secondary-progressions` | Calculate secondary-progressed planets with natal context |
| POST | `/api/astro/varga-svg` | Render an original North/South Indian varga SVG |
| POST | `/api/astro/lunar-nodes` | Calculate distinct mean and osculating lunar nodes |
| POST | `/api/astro/returns` | Find the next solar or lunar return and its chart |
| POST | `/api/astro/solar-arcs` | Calculate named symbolic solar-arc directions |
| POST | `/api/astro/moon-phases` | Calculate Moon phase geometry or a bounded primary-phase calendar |
| POST | `/api/astro/planetary-events` | Search a bounded interval for planetary ingresses, stations and exact major… |
| POST | `/api/astro/house-ingresses` | Search transit crossings of fixed reference-chart house cusps |
| POST | `/api/astro/aspect-windows` | Find exact-hit-anchored major-aspect orb windows |
| POST | `/api/astro/event-calendar` | Compose a bounded astrology event calendar |
| POST | `/api/astro/event-rule-search` | Evaluate a bounded versioned Boolean event rule |
| POST | `/api/astro/convention-compare` | Compare calculation conventions or trusted signed releases |
| POST | `/api/astro/chart-robustness` | Separate birth-time and convention sensitivity |
| POST | `/api/astro/civil-time-audit` | Audit ambiguous or invalid local birth times without guessing |
| POST | `/api/astro/chart-input-readiness` | Gate chart workflows against birth-time data quality |
| POST | `/api/astro/house-system-readiness` | Preflight every supported house system without fallback |
| POST | `/api/astro/house-placement-stability` | Measure planetary house-placement stability across supported systems |
| POST | `/api/astro/aspect-policy-stability` | Compare several explicit aspect-orb policies on one chart |
| POST | `/api/astro/house-boundary-proximity` | Audit planet clearance from house cusps across every 12-house system |
| POST | `/api/astro/location-precision-audit` | Audit chart sensitivity to birth-coordinate precision |
| POST | `/api/astro/location-transition-scan` | Scan outward for observed location-sensitive chart transitions |
| POST | `/api/astro/chart-uncertainty-envelope` | Separate observed chart sensitivity across time and location uncertainty |
| POST | `/api/astro/electional-robustness-audit` | Stress-test electional criteria across start-time and venue uncertainty |
| POST | `/api/astro/electional-tolerance-frontier` | Measure observed electional rule tolerance in time and venue directions |
| POST | `/api/astro/electional-feasibility-audit` | Explain sampled electional feasibility and minimal observed rule relaxations |
| POST | `/api/astro/electional-resolution-audit` | Show which observed electional match runs coarser sampling misses |
| POST | `/api/astro/electional-sampling-phase-audit` | Show whether electional results change with the sampling anchor |
| POST | `/api/astro/electional-criterion-omission-audit` | Measure which selected electional criteria uniquely exclude observed samples |
| POST | `/api/astro/electional-criterion-pair-audit` | Expose observed two-criterion electional exclusion interactions |
| POST | `/api/astro/electional-criterion-relation-audit` | Expose observed compatibility and redundancy among electional criteria |
| POST | `/api/astro/electional-criterion-budget-audit` | Find every optimal electional rule-relaxation combination by exact omission… |
| POST | `/api/astro/electional-criterion-budget-stability-audit` | Audit whether optimal electional rule relaxations survive sampling-grid changes |
| POST | `/api/astro/electional-criterion-budget-regret-audit` | Find least sampling-sensitive electional rule relaxations by exact minimax… |
| POST | `/api/astro/electional-criterion-budget-pareto-audit` | Enumerate weight-free Pareto-efficient electional rule relaxations |
| POST | `/api/astro/electional-criterion-shapley-audit` | Attribute excluded electional samples fairly across interacting criteria |
| POST | `/api/astro/electional-criterion-conflict-core-audit` | Find the smallest electional rule combinations that make a window infeasible |
| POST | `/api/astro/electional-criterion-robust-repair-audit` | Find the smallest criterion relaxations that work across every sampling grid |
| POST | `/api/astro/electional-criterion-repair-impact-audit` | Audit what every minimal cross-grid criterion repair actually admits |
| POST | `/api/astro/electional-criterion-repair-distinction-audit` | Prove how every pair of minimal cross-grid criterion repairs differs |
| POST | `/api/astro/electional-criterion-repair-overlap-audit` | Classify exact overlap and containment for every minimal repair pair |
| POST | `/api/astro/electional-criterion-repair-hierarchy-audit` | Build the exact containment hierarchy of minimal repair consequences |
| POST | `/api/astro/electional-criterion-repair-coverage-audit` | Audit exact observation support and single-repair coverage loss |
| POST | `/api/astro/electional-criterion-repair-resilience-audit` | Audit exact multi-repair failure tolerance |
| POST | `/api/astro/electional-criterion-repair-loss-frontier-audit` | Audit exact worst-case repair-loss damage |

…and 16 more operations. They are listed in full on the page.

## Machine-readable artifacts (8)

- **OpenAPI** — https://artifacts.apis.io/cosmic-ephemeris/openapi/cosmic-ephemeris-calculations-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-place-search-response-schema.json
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-place-search-request-schema.json
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-connected-electional-criterion-repair-hardening-pareto-hierarchy-audit-electional-criterion-repair-hardening-pareto-hierarchy-audit-response-schema.json
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-connected-vimshottari-response-schema.json
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-birth-chart-response-schema.json
- **JSONSchema** — https://artifacts.apis.io/cosmic-ephemeris/json-schema/cosmic-ephemeris-connected-electional-criterion-repair-hardening-pareto-audit-electional-criterion-repair-hardening-pareto-audit-response-schema.json
- **APIsJSON** — https://artifacts.apis.io/cosmic-ephemeris/apis.yml

## Other Cosmic Ephemeris APIs (2)

- [Cosmic Ephemeris Interpretation API](https://apis.io/apis/cosmic-ephemeris/cosmic-ephemeris-interpretation-api/)
- [Cosmic Ephemeris Pro timeline API](https://apis.io/apis/cosmic-ephemeris/cosmic-ephemeris-pro-timeline-api/)

## Tags

Calculations

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cosmic-ephemeris/cosmic-ephemeris-calculations-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cosmic-ephemeris/.