Seamlessly integrate verified Human Design chart calculations, transit overlays, and compatibility synastry into your application using our premium high-performance REST API.
The Human Design Engine API is a RESTful service exposing calculation outputs from the open-source OpenHumanDesignMCP engine. Built on Swiss Ephemeris coordinates, calculations are mathematically audited to match global standard practitioners (Neutrino Design, Genetic Matrix).
Developers can calculate natal charts, composite transit conditioning charts, and synastry reports on demand. Output payloads are structured in standard JSON, enabling quick rendering of customized charts or report PDFs.
Obtain a secure API key from your humandesignengine.com developer dashboard to authorize requests.
Include the X-API-Key in your request headers. Keep your key confidential and reset it if exposed.
Parse the JSON data to build custom charts, bodygraph widgets, or premium personalized report flows.
All authenticated API endpoints reside on our high-performance cluster and require your API key passed in the header. Public rate-limited endpoints do not require keys.
Ensure you hit the correct subdomain for the desired service:
https://api.humandesignengine.com/v1https://reports.humandesignengine.comX-API-Key: your_confidential_api_key_here Content-Type: application/json
Generate a test API key, check your tier limits, or revoke active keys in real-time. Created keys work instantly across all endpoints.
Select an API endpoint and a language to view standard code implementation samples.
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A detailed breakdown of developer capabilities, rates, and licensing protections offered across the HDE API plans.
| Feature / Parameter | Public Tier | Hobbyist | Builder | Growth | Enterprise |
|---|---|---|---|---|---|
| Monthly Limit | Rate-limited (IP) | 1,000 calls | 10,000 calls | 50,000 calls | 200,000+ calls |
| Natal Calculations | ✓ (Basic) | ✓ (Full) | ✓ (Full) | ✓ (Full) | ✓ (Full) |
| Transit Overlays | — | — | ✓ | ✓ | ✓ |
| Relationship Synastry | — | — | — | ✓ | ✓ |
| Commercial License | — | ✓ | ✓ | ✓ | ✓ |
| Uptime SLA | — | — | 99.5% Uptime | 99.9% Uptime | 99.99% Uptime |
| Support Channel | Community | Community | Email (24hr) | Priority Email | Slack & Phone |
| Infrastructure | Shared | Shared | Shared | Shared | Dedicated Cluster |
Scale programmatically. Choose the tier that accommodates your workload and SLA demands.
For side projects, student calculations, and developer testing.
Perfect for growing startups, wellness apps, and high-quality widgets.
For active apps and commercial scaling platforms.
High-throughput architectures requiring high SLAs and dedication.