The depth of Chinese metaphysics.
In one API call.
White-label Bazi, Zi Wei Dou Shu, and chart-contextualised Tarot. Build your own frontend; use our engines, our AI narrative, and our chart-fusion logic. Per-call pricing. No seats, no minimums, no lock-in.
The playbook is a single .md file — API reference, design system, business model, and 15 build ideas. Drop it into Claude Code / Cursor / any AI coding assistant and they'll have everything needed to ship an integration.
Dual-engine chart intelligence
Bazi + Zi Wei Dou Shu on every chart, cross-referenced. The only API on the market that fuses both systems in one call. Deterministic, reproducible, and audited against master-verified reference charts.
Chart-grounded AI, in your voice
Every AI answer is worked out from the user's own chart: their Day Master, their current Da Yun, this year's pillar. Nothing is generic horoscope text. You set the persona name, tone, length and format on each request, so the answers sound like your product.
Privacy by construction
We never embed end-user names in the narrative. A reading generated for Alice is safe to serve to anyone with the same chart signature — no PII leaks through the cross-user cache. Every call is metered to an append-only ledger with MTD spend in every response.
Turn on only what you need
Bazi Chart Includes ZWDS — two engines, one price. Also covers profile, annual, signals, rhythm and birth-hour rectification. | $0.10/ call |
Chart Chat Per answer. An opening snapshot plus questions, then chat grounded on the chart, in your voice. | $0.02/ call |
Daily Guidance Structured facts for each day of a chart: one day, a batch, or a date range. | On request |
Pair Analysis Two charts as structured facts: what each supplies the other, interactions, hidden pulls. No score, by design. | $0.80/ call |
Tarot Chart-contextualised draw with LLM interpretation. Seven spreads. | $0.30/ call |
AI Reading The full written reading. A new one takes about 15 minutes to generate, so this call cannot return one yet — see /status. | $0.50/ call |
AI Reading · Editor Re-runs the editor pass on a reading already generated. 20% of the AI Reading price. | $0.10/ call |
Volume discounts above 50,000 calls / month. Custom pricing for enterprise contracts.
From email to first call in a day
Email us with your use case. We turn around a tenant record + API key within 24h.
You pick the products you want. Unused modules stay disabled — no surprises on invoices.
REST + JSON. Call from your backend, build your own UI. Docs at /docs/api with copy-paste examples.
We sum usage on the 1st. Invoice to your billing email. Stripe or wire, your call.
Brand recommendations, not constraints
The API returns JSON. Your UI can look however you want. That said — here are patterns that reliably land in the destiny / wellness vertical and that we’ve battle-tested on our own app.
Two families, no more. Serif for display + body (Noto Serif SC, Playfair, Cormorant). Sans for UI chrome (Inter). Resist a third family.
Warm cream background (#FCFBF7), antique gold accent (#B8860B), Wu Xing element tints applied sparingly to card borders. Skip purple neon.
4px baseline grid. Card-in-grid primitive at 2:3 aspect. Long readings should be collapsible by section — paywall ONE life area to anchor the upgrade CTA.
Use minmax(min(100%, Xpx), 1fr) grids so columns auto-stack on narrow viewports. Touch targets ≥40×40. Tables become stacked cards.
Full CSS custom-properties palette + component primitives in the playbook.
Four proven ways to monetize
Pick one. Don’t run multiple in parallel year one — it fragments your customer mental model and ruins LTV comparisons.
| Archetype | Price range | Margin | Best for |
|---|---|---|---|
| Per-report | $29–$149 per reading | ~75% | Partners with existing audience / creator reach |
| Subscription | $9.99–$24.99 / mo | ~76%, 4–8× LTV | Daily-engagement apps (Co-Star / CHANI model) |
| Consultancy | $200–$2,000 per session | Human-split | Agencies w/ trained consultants (Joey Yap playbook) |
| Embedded feature | Bundled into existing app | Retention ROI | Dating, wellness, parenting, HR SaaS |
Unit-economics math + free-tier architecture + seasonal revenue calendar in the playbook.
15 concrete products you could ship
Each idea names the modules used, a target price, and the archetype it fits. Hand this list to your AI agent and say "build #3."
Morning push written from the structured facts of the user's chart × today's pillar. $4.99/mo. Calm + CHANI analog.
Dual chart upload → monthly relationship check-ins. $19.99/mo.
Morning draw + evening reflection + streaks. $9.99/mo with compat upsell.
In-app purchase: $2.99 to see what two charts supply each other. Structured facts, never a score or a percentage.
Personality + life-path module bundled into Headspace-style HR SaaS. $2–5/emp/mo.
Names chosen to balance the baby's chart, starting from the chart. Name scoring is not in the API yet: ask us. $29 per query.
Astrology YouTuber launches their own $9.99 subscription app. The creator keeps 70%; you cover the per-call API cost.
Team chart report + 90-min Zoom workshop. $2,000 per team.
60 landing pages (one per day-pillar) → rank for "Jia Zi personality" etc. $6 content cost.
"Your cat is fire-dominant drama." Cat people pay for their cat. $12.99 per pet.
Plus 5 more in the playbook — download above for the full set with unit economics.
Bearer-key auth · Module-level enable/disable · Idempotency keys on every billed call · MTD usage in every response · Append-only billing ledger · CSV usage export · Editor re-runs at 20% of the reading price · Half price when the editor pass fails, nothing billed on an error · No-name narrative guarantee · B2C feature upgrades roll to you only when you flip the module on.
Your frontend. Our depth.
Tell us your use case and we’ll turn around a tenant + first API key in under a day.
api@daymaster.ai