FreeAstroAPIStart building
Set up your key, call the natal chart endpoint, and avoid the first integration mistakes.
Build astrology apps
Blueprints for product experiences powered by deterministic astrology data and AI layers.
WordPress Astrology Starter Kit: Set Up Astrology Suite for FreeAstroAPI
Install the Astrology Suite WordPress plugin, connect your FreeAstroAPI key, add chart and report blocks, and test your first public astrology page.
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Best 2026 AI for Astrology
Looking for the best AI for astrology? Use deterministic chart calculations from an astrology API, then let an LLM deliver nuanced, high-quality interpretation.
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How to Build an AI Astrology Psychological Report Pipeline with Multi-Pass LLM Generation
Learn how to build a production pipeline that combines deterministic natal chart data with a multi-pass LLM workflow to generate detailed astrological psychological reports.
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AstroSage API: Build an AstroSage-Like Astrology Chat App or Bot
Learn how to build an AstroSage-like astrology chat app or bot with FreeAstroAPI, including Vedic, Western, horoscope, compatibility, Panchang, and chart endpoints.
Open guideAdvanced integrations
Add specialized rendering, Chinese astrology, MCP workflows, and production scaling patterns.
How to Implement AstroFont in Any Frontend Project
Add StarFont Sans and StarFont Serif to any frontend app with web-font hosting, glyph mappings, download links, and implementation notes.
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Calculate Bazi Four Pillars with Python: A Complete Guide
Learn how to calculate the Four Pillars of Destiny (八字) from a birth date using Python. This guide covers the lunar calendar, Heavenly Stems, Earthly Branches, and practical code examples.
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True Solar Time Calculator for BaZi
Why clock time is not enough for accurate BaZi. Learn how to calculate True Solar Time using Longitude and the Equation of Time (EoT).
Open guideMore guide articles
Additional comparisons, technical deep dives, and astrology concepts for developers.
Best Vedic Astrology API for Developers in 2026
Compare Vedic astrology APIs for Kundli apps, dasha, Panchang, compatibility, AI chat, pricing, free tiers, and production use.
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Best Astrology APIs in 2026: Complete Developer Comparison
Compare FreeAstroAPI, AstrologyAPI, AstroAPI, RoxyAPI, Astrology API, Free Astrology API, VedicAstroAPI, VedAstro, and Prokerala for pricing, free tiers, AI/MCP support, Western astrology, Vedic astrology, SVG/PDF output, and rate limits.
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Tropical vs Sidereal Astrology for Developers: What Your API Should Support
A simple guide to tropical and sidereal astrology for developers building birth chart calculators, Vedic apps, horoscope tools, and astrology APIs.
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The Bazi Synastry Scoring Algorithm: A Technical Deep Dive
Understand the proprietary logic behind our professional Bazi Compatibility Synastry Engine, including weights, classical sources, and specific examples.
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Time Zones, LMT, and Precision in Astrology
Why a 4-minute error changes your Ascendant, and how our API handles historical shifts automatically.
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Understanding Astrological Aspects for Developers
A deep dive into the geometry of astrology. Learn how to parse, interpret, and visualize the aspects returned by FreeAstroAPI.
Open guideReady to build with astrology data?
Create a free API key and make your first natal chart in 2 minutes