Cosmic Ephemeris

Cosmic Ephemeris Calculations API

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

GitHub OpenAPI

Operations 76

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 #
POST /api/astro/electional-criterion-repair-hardening-audit Audit exact single-repair hardening effects #
POST /api/astro/electional-criterion-repair-hardening-pareto-audit Compare exact repair-hardening Pareto tradeoffs #
POST /api/astro/electional-criterion-repair-hardening-pareto-hierarchy-audit Map the exact hierarchy of repair-hardening Pareto profiles #
POST /api/astro/electional-criterion-repair-hardening-regret-audit Find every least-worst-regret repair-hardening profile #
POST /api/astro/synastry-svg Render a deterministic synastry double wheel #
POST /api/astro/transit-svg Render a deterministic natal/transit double wheel #
POST /api/astro/natal-report Build a calculation-fact natal report with HTML, PDF, DOCX, XLSX, ODS, EPUB… #
POST /api/astro/birth-time-sensitivity Handle unknown/approximate birth time or sample an explicit interval #
POST /api/astro/fixed-stars Calculate six independently validated fixed stars #
POST /api/astro/relocation-chart Recalculate chart angles and houses for a new location #
POST /api/astro/astrocartography Calculate astrocartography geometry and optional downloadable maps #
POST /api/astro/eclipse-geometry Search bounded global solar and lunar eclipse geometry #
POST /api/astro/electional-search Filter bounded hourly electional samples #
POST /api/astro/natal-analysis Calculate natal geometry with optional graha drishti or partial Shadbala… #
POST /api/astro/planetary-hours Calculate classical unequal planetary hours for one local date #
POST /api/astro/davison Calculate an uncorrected TT/arithmetic Davison relationship chart #

Specifications

⚙
OpenAPI
https://artifacts.apis.io/cosmic-ephemeris/openapi/cosmic-ephemeris-calculations-api-openapi.yml

Schemas & Data

📊
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

Other Resources

🔗
APIsJSON
https://artifacts.apis.io/cosmic-ephemeris/apis.yml

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OpenAPI Specification

cosmic-ephemeris-calculations-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Cosmic Ephemeris calculation Calculations API
  version: 2026-10-12.current-contract-promotion
  description: Machine-readable description of the seventy-eight live R231 calculation contracts. This DOCUMENT REVISION identifies the contract set; runtime availability is independently verified at the public gateway. Call the public Node gateway, not the internal Python service. API keys are server-side credentials. Bearer and x-api-key are alternatives, and dashboard cookies are not calculation credentials. Named keys can be restricted to one calculation scope or astro:*, can expire, and are shown only once at creation. Charts require a known civil time, valid IANA timezone, dates from 1800-01-01 through 2200-12-31, and valid coordinates. Tropical remains the default; supported sidereal ayanamsas are Lahiri, Raman, Krishnamurti, Fagan–Bradley, Yukteshwar, Sassanian, True Chitra, True Revati, True Pushya, Galactic Center at 0 Sagittarius, and Galactic Alignment/Mardyks. The birth-time-sensitivity workflow may instead receive an explicitly unknown or approximate time; it returns sampled stability only and never invents an exact chart. Vargas supports D1/D2/D3/D4/D5/D6/D7/D8/D9/D10/D11/D12/D16/D20/D24/D27/D30/D40/D45/D60/D81/D108/D144/D150. Vimshottari retains its two-level default and supports optional depth 3 and 4. The Ashtakavarga contract returns unreduced seven-planet Bhinnashtakavarga, contributor Prastara, and their 337-point Sarvashtakavarga sum, with explicit opt-in reductions and pindas and no interpretation or prediction. These are bounded calculation conventions, not a complete Jyotish system or practitioner validation.
  termsOfService: https://cosmicephemeris.com/terms.html
  contact:
    name: Cosmic Ephemeris support
    email: support@cosmicephemeris.com
servers:
- url: https://api.cosmicephemeris.com
  description: Public gateway; no runtime version prefix
security:
- BearerApiKey: []
- HeaderApiKey: []
tags:


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# Full source: https://artifacts.apis.io/cosmic-ephemeris/openapi/cosmic-ephemeris-calculations-api-openapi.yml