Embed our calculators on your site.

If you run an astrology blog, a Chinese culture site, or a divination resource, you are welcome to embed our calculators directly. The widgets are free, accurate, and updated by us. You get a real tool for your readers; we get a small "Powered by Eastern Pillars" line and a dofollow link.

Four Pillars (BaZi)

The full BaZi calculator — true solar time, lichun boundary, transparent zi-hour school, hidden stems, Ten Gods, Five Elements, Luck Pillars, and the 2026 annual transit.

<iframe src="https://easternpillars.com/embed/bazi"
  width="100%" height="1200"
  frameborder="0" loading="lazy"
  style="border: 1px solid #c9c0ae; border-radius: 2px;">
</iframe>

Zi Wei Dou Shu (Purple Star)

The 12-palace + 14-star Zi Wei chart. San-He school via the open-source iztro library.

<iframe src="https://easternpillars.com/embed/ziwei"
  width="100%" height="1200"
  frameborder="0" loading="lazy"
  style="border: 1px solid #c9c0ae; border-radius: 2px;">
</iframe>

What we ask in return

Keep the small "Powered by Eastern Pillars" footer visible. (It's already in the iframe.)
Don't strip the link or proxy the iframe through a script that hides the source.
If your site is in a niche we haven't seen — Vietnamese, Korean Saju, diaspora communities — drop us a line at hello@easternpillars.com. We're happy to help and to learn what's missing.

If you'd rather use the API

The underlying engine is also available as a free JSON API for developers — see /api/bazi.json and /api/ziwei.json. Generous edge caching, no auth, no rate limit on reasonable usage. Attribution requested but not technically required.

We will not retroactively add gatekeeping. If you embed today, the iframe stays free forever. The site is built to compound without trapping anyone who shows up early.