Add accurate natal charts, transits, and synastry to your app in minutes. Developer-first. Verified accuracy. No one else offers this — you're first to market.
No one else offers a production-grade Human Design API. Existing tools are black-box calculators with no developer access. We're changing that.
Human Design Engine gives you programmatic access to verified Human Design computations — bodygraphs, gates, channels, centers, profiles, authorities, incarnation crosses, planetary transits, and synastry overlays. All through a clean REST interface with predictable JSON responses.
Built on the OpenHumanDesignMCP open-source calculation engine — the same peer-reviewed algorithms trusted by thousands. Every computation is transparent, auditable, and accurate.
RESTful. JSON. Predictable. Built for integration from day one.
Compute a full bodygraph from birth date, time, and location. Returns Type, Strategy, Authority, Profile, all nine Centers with activation states, 64 Gates, 36 Channels, and Incarnation Cross.
Get real-time planetary positions mapped to gates and lines. Compute transit overlays against any natal chart. Always current — ephemeris data auto-updates daily.
Compare two charts side by side. Identify electromagnetic channels, dominance, compromise, and companionship dynamics. Generate composite bodygraph overlays.
Retrieve detailed interpretations for any gate or channel. Includes I Ching hexagram mapping, circuitry (Individual, Tribal, Collective), and line-level descriptions.
Get raw activation data for rendering your own bodygraph visualizations. Defined/undefined centers, activated gates with line and color, and channel connections — all structured for canvas or SVG rendering.
Simple key-based authentication. Usage dashboards track every call. Rate limits scale with your plan. Webhooks notify you when you approach your monthly quota.
No SDK required. Just your API key and a birth time.
# Compute a natal chart in one request curl -X POST https://api.humandesignengine.com/v1/chart/natal \ -H "Authorization: Bearer YOUR_A...pan> \ -H "Content-Type: application/json" \ -d '{ "birth_date": "1988-06-15", "birth_time": "14:30:00", "latitude": 40.7128, "longitude": -74.0060, "timezone": "America/New_York" }' # Response (abbreviated): { "type": "Generator", "strategy": "To Respond", "authority": "Sacral", "profile": "4/6", "incarnation_cross": "Right Angle Cross of the Sphinx", "defined_centers": ["Sacral", "Root", "Spleen"], "gates": { "1": { "line": 3, "color": 5 }, ... }, "computed_at": "2026-05-29T01:11:00Z" }
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Perfect for learning and side projects.
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High-volume, custom integrations.
100 free API calls every month — no credit card required.
Explore every endpoint, build your integration, and verify our accuracy before you commit.
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