Professional astrology calculation API powered by Swiss Ephemeris. Compute natal charts, synastry, progressions, directions, transits, Human Design, and 80+ other calculation types via a simple REST API.
\n","schema":"https://schema.getpostman.com/json/collection/v2.0.0/collection.json","toc":[],"owner":"54689779","collectionId":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","publishedId":"2sBXqNmy3n","public":true,"customColor":{"top-bar":"FFFFFF","right-sidebar":"303030","highlight":"7FD47F"},"publishDate":"2026-05-11T00:22:05.000Z"},"item":[{"name":"Core","item":[{"name":"Natal Chart","id":"ae451d8c-8b0f-4b04-9baa-ea01f6abb02d","protocolProfileBehavior":{"disableBodyPruning":true},"request":{"auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":false},"method":"POST","header":[{"key":"Content-Type","value":"application/json"},{"key":"Accept","value":"application/json"}],"body":{"mode":"raw","raw":"{\n \"date\": \"1990-05-15\",\n \"time\": \"14:30:00\",\n \"timezoneOffset\": 3,\n \"latitude\": 50.45,\n \"longitude\": 30.52\n}","options":{"raw":{"language":"json"}}},"url":"https://api.astroway.info/v1/chart","description":"Calculate a full natal chart: planets, house cusps, aspects, sect, and angular data for a given birth moment.
\n","urlObject":{"path":["chart"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"b0e22d80-2ec6-401e-a1aa-73821c532c87","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate raw planet longitudes for a given date/time without full chart context (no houses, no aspects).
\n","urlObject":{"path":["planets"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"4d376106-3eb4-4f55-8f4d-9f2e74f126cd","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Return planet positions for a date range with configurable step (min 0.01 days). Max range: 1 year for sub-day steps, 5 years otherwise. Optionally filter by planetIds.
\n","urlObject":{"path":["ephemeris"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"1bd12a14-d6a9-477a-8b0e-405a4544fa17","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate sunrise, sunset, twilight times, and day length for a given date and geographic location.
\n","urlObject":{"path":["sun-times"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"44fc48fc-132a-4b4e-ac46-444dd54b29bd","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"⭐ Core endpoints
\n","_postman_id":"7a28c8a0-f1f7-404a-8320-ab34ad17c87e","auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":true,"source":{"_postman_id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","name":"AstroWay Calculation API","type":"collection"}}},{"name":"Comparisons","item":[{"name":"Synastry","id":"f002a3d2-f147-487a-b6bc-d4b7d9d92b49","protocolProfileBehavior":{"disableBodyPruning":true},"request":{"auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":false},"method":"POST","header":[{"key":"Content-Type","value":"application/json"},{"key":"Accept","value":"application/json"}],"body":{"mode":"raw","raw":"{\n \"chart1\": {\n \"date\": \"1990-05-15\",\n \"time\": \"14:30:00\",\n \"timezoneOffset\": 3,\n \"latitude\": 50.45,\n \"longitude\": 30.52\n },\n \"chart2\": {\n \"date\": \"1985-11-03\",\n \"time\": \"08:15:00\",\n \"timezoneOffset\": 2,\n \"latitude\": 48.46,\n \"longitude\": 35.04\n }\n}","options":{"raw":{"language":"json"}}},"url":"https://api.astroway.info/v1/synastry","description":"Calculate cross-chart aspects between two natal charts for relationship analysis.
\n","urlObject":{"path":["synastry"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"058c89ac-ce21-4147-9d35-44dbc4fde346","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate a midpoint composite chart by averaging the planetary positions and house cusps of two natal charts.
\n","urlObject":{"path":["composite"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"97987256-a7e4-4e4e-ab62-2c352b9c1b2a","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate a Davison relationship chart using the midpoint in time and space between two birth moments.
\n","urlObject":{"path":["davison"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"462e87e4-08ea-4a18-9a72-d19d73ba3b48","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate a coalescent chart — the harmonic chart that resonates most strongly between two charts.
\n","urlObject":{"path":["coalescent"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"3fb4f711-526f-458c-9892-35b72bc35bd2","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate synastry aspects among 2–8 charts simultaneously, returning all pairwise cross-chart aspect matrices.
\n","urlObject":{"path":["group-synastry"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"53fa0bbf-1dd7-4daf-87b1-3ecd4bfa9532","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"NxM matrix of cross-chart aspects between the two charts (default 13×13: Sun..Pluto + nodes + Lilith + Chiron). Cells contain aspect or null.
\n","urlObject":{"path":["synastry","aspect-grid"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"fcab949e-c7a2-42e8-8d40-a988fcb2206a","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Locate each chart’s personal planets in the partner’s houses; reports top-3 emphasized houses on either side.
\n","urlObject":{"path":["synastry","house-overlay"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"f3aea042-35c2-4d3b-869c-ebd89325ff92","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Element (fire/earth/air/water) and modality (cardinal/fixed/mutable) tallies for each chart and the combined pair, with dominant and missing elements.
\n","urlObject":{"path":["synastry","element-balance"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"afe103f1-d9a4-4b09-8570-2faa75b211a2","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Weighted 0–100 attraction score from Sun-Moon, Mars-Venus, ASC/DSC, Mars-Mars, Sun-Mars, Moon-Venus contacts and 5th-house overlay.
\n","urlObject":{"path":["synastry","attraction-score"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"9f86f142-478c-4324-88bb-bfc471af748a","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"🤝 Comparisons endpoints
\n","_postman_id":"22c3e999-8117-4117-be7a-cae2bcc7338f","auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":true,"source":{"_postman_id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","name":"AstroWay Calculation API","type":"collection"}}},{"name":"Prognostics","item":[{"name":"Transits","id":"1503a8ce-8d5f-4490-b9ae-f6d79e377325","protocolProfileBehavior":{"disableBodyPruning":true},"request":{"auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":false},"method":"POST","header":[{"key":"Content-Type","value":"application/json"},{"key":"Accept","value":"application/json"}],"body":{"mode":"raw","raw":"{\n \"date\": \"1990-05-15\",\n \"time\": \"14:30:00\",\n \"timezoneOffset\": 3,\n \"latitude\": 50.45,\n \"longitude\": 30.52,\n \"transitDate\": \"2024-06-15\",\n \"transitTime\": \"12:00:00\",\n \"transitTzOffset\": 3\n}","options":{"raw":{"language":"json"}}},"url":"https://api.astroway.info/v1/transits","description":"Calculate transit planet aspects to natal planets for a given date. Returns applying and separating aspects.
\n","urlObject":{"path":["transits"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"26128d28-4cae-46d8-ad33-dda0c0250c92","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Build a month-by-month transit calendar for a natal chart showing exact dates of aspect ingresses and partile hits.
\n","urlObject":{"path":["transit-calendar"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"9c082c2f-0539-40f6-ab17-bd4fedb9a082","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Generate a combined forecast calendar including transits, lunar phases, ingresses, and retrograde stations for a given period.
\n","urlObject":{"path":["forecast-calendar"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"3a1bc2d2-9f04-422b-ad08-bf95f4b3bb5c","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate secondary progressed chart (day-for-a-year) for a target date. Returns progressed planets, angles, and aspects to natal.
\n","urlObject":{"path":["progressions"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"16f2d11c-865e-4246-a2f4-6dd480e48a5d","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate tertiary progressions (day-for-a-lunar-month) to a target date. Supports converse direction.
\n","urlObject":{"path":["tertiary-progressions"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"960db000-01f6-4c5a-a741-1dec490bfae7","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate minor progressions (lunar month-for-a-year) to a target date. Supports converse direction.
\n","urlObject":{"path":["minor-progressions"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"411be3fb-c269-4781-b67a-13d9c54b0292","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate primary directions (Ptolemaic or Regiomontanus) up to a maximum age. Returns a timeline of directed aspect hits.
\n","urlObject":{"path":["primary-directions"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"b9ccffe2-a2f5-489b-be28-a9a68ed13534","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate symbolic arc directions (1° per year, solar arc, Naibod) to natal points for a target date.
\n","urlObject":{"path":["symbolic-directions"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"8ca879b8-3ec0-437e-8550-70c758b2c1f4","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Find the exact moment when the Sun returns to its natal longitude in a given year. Returns full solar return chart.
\n","urlObject":{"path":["solar-return"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"a4fc301f-52ec-4323-9ff7-7007ebaa7548","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Find the next date when the Moon returns to its natal longitude. Returns full lunar return chart.
\n","urlObject":{"path":["lunar-return"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"859ed4fb-a928-47c0-894c-f7125c06e156","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Find all returns of any planet to its natal longitude within a given year. Returns full charts for each return.
\n","urlObject":{"path":["planetary-return"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"b3ccd13d-483f-4bb9-9271-aa2a45e93d85","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate annual profections: profected Ascendant, lord of the year, activated house, and monthly profection sub-rulers.
\n","urlObject":{"path":["profections"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"aa2b727c-ab40-4b14-9497-d5fbedec99b4","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate Firdaria planetary periods — the traditional Persian time-lord system based on sect and planet order.
\n","urlObject":{"path":["firdaria"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"0f4bc15d-cb92-477b-98c6-a80aaa083a8a","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Rectify an approximate birth time using a list of life events and transit/direction hits to narrow the birth time window.
\n","urlObject":{"path":["rectification"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"268d14da-7500-49a8-b236-91b0e5912022","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Apply the Trutine of Hermes (Animodar) technique to derive the birth time from the Moon's prenatal syzygy position.
\n","urlObject":{"path":["rectification","trutine"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"c422c250-3704-4bc2-b6d9-e5d7d53f50b6","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"🕐 Prognostics endpoints
\n","_postman_id":"e64cda0a-c1f4-45e1-bc99-243800a93464","auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":true,"source":{"_postman_id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","name":"AstroWay Calculation API","type":"collection"}}},{"name":"Specialized Charts","item":[{"name":"Harmonic Chart","id":"d3721714-ee3b-4abf-93d3-50c17aeb3871","protocolProfileBehavior":{"disableBodyPruning":true},"request":{"auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":false},"method":"POST","header":[{"key":"Content-Type","value":"application/json"},{"key":"Accept","value":"application/json"}],"body":{"mode":"raw","raw":"{\n \"date\": \"1990-05-15\",\n \"time\": \"14:30:00\",\n \"timezoneOffset\": 3,\n \"latitude\": 50.45,\n \"longitude\": 30.52,\n \"harmonic\": 7\n}","options":{"raw":{"language":"json"}}},"url":"https://api.astroway.info/v1/harmonics","description":"Calculate a harmonic chart by multiplying all planet longitudes by the given harmonic number (H2–H36).
\n","urlObject":{"path":["harmonics"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"d61c0f92-de6a-49bc-9448-92bb13539a10","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate the draconic chart by shifting all planet longitudes relative to the True Node (0° = True Node).
\n","urlObject":{"path":["draconic"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"25076457-6b2e-4ebf-b346-737850ae26ca","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"Calculate heliocentric planetary positions (Sun-centered) for a given birth moment. Earth replaces Sun; Moon is excluded.
\n","urlObject":{"path":["heliocentric"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"5e905378-d96a-4906-a7ba-c500ca97487f","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"DEPRECATED in v2.0.0 — moved to dedicated per-varga endpoints /vedic/varga/{D1..D60} for OpenAPI/SDK ergonomics. Generic endpoint kept for 6-month sunset. Calculate a Vedic divisional (varga) chart using sidereal zodiac. Supported vargas: D1–D60 (e.g. D9 Navamsha).
🧭 Specialized Charts endpoints
\n","_postman_id":"0b87d667-d1eb-4fea-b98a-fc3795079be7","auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":true,"source":{"_postman_id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","id":"fb5f00c0-d1a8-42fa-8951-8da08850f6a6","name":"AstroWay Calculation API","type":"collection"}}},{"name":"Visualization","item":[{"name":"Western Wheel (SVG)","id":"28ef5f4d-f9cd-48e6-abd2-e5c8b3c4ca16","protocolProfileBehavior":{"disableBodyPruning":true},"request":{"auth":{"type":"apikey","apikey":{"basicConfig":[{"key":"key","value":"X-Api-Key"},{"key":"value","value":"aw_test_REPLACE_WITH_YOUR_KEY"}]},"isInherited":false},"method":"POST","header":[{"key":"Content-Type","value":"application/json"},{"key":"Accept","value":"application/json"}],"body":{"mode":"raw","raw":"{\n \"date\": \"1990-05-15\",\n \"time\": \"14:30:00\",\n \"timezoneOffset\": 3,\n \"latitude\": 50.45,\n \"longitude\": 30.52,\n \"options\": {\n \"size\": 800,\n \"theme\": \"light\",\n \"showAspects\": true,\n \"format\": \"json\"\n }\n}","options":{"raw":{"language":"json"}}},"url":"https://api.astroway.info/v1/render/wheel-western","description":"Render a Western natal wheel as SVG: signs ring, houses ring, planets, aspect lines. Pure server-side, no browser needed.
\n","urlObject":{"path":["render","wheel-western"],"host":["https://api.astroway.info/v1"],"query":[],"variable":[]}},"response":[{"id":"b28a6f5c-4a0d-4d0b-8119-0b7b0f791dbc","name":"Successful calculation","originalRequest":{"method":"POST","header":[{"description":"Added as a part of security scheme: apikey","key":"X-Api-Key","value":"