ProfileEngine API
The personality intelligence API that learns from conversation, not surveys.
Live API Demo
See the API in action
{
"message": "I've been thinking about changing careers.
Part of me is excited, but honestly I keep
putting off updating my resume. I know I
should just do it.",
"user_id": "usr_demo_29x"
}
Capabilities
What you get from every message
5-Layer Analysis
Surface, Emotional, Shadow, Soul, and Growth Edge — each message analyzed across five psychological depths.
Big Five Inference
OCEAN personality scores with evidence citations. No self-report surveys, just natural conversation.
Therapeutic Intelligence
Motivational Interviewing readiness detection and Internal Family Systems part identification.
Living Profiles
Profiles evolve with every message. Version-tracked, evidence-backed, never a static snapshot.
Integration
Three steps to personality-aware AI
Send conversation messages
POST messages to the REST API as your users chat. No special onboarding or intake forms required.
Profiles build automatically
ProfileEngine builds a living psychological profile from natural conversation. Each message adds evidence.
Your AI adapts
Retrieve personality intelligence to adapt tone, depth, and communication style in real-time.
Comparison
How ProfileEngine is different
| ProfileEngine | Crystal | Humantic | Receptiviti | |
|---|---|---|---|---|
| Data source | Conversation | Resume | Batch text | |
| Real-time | Yes | No | No | No |
| Depth | 5-layer + MI + IFS | DISC | DISC + Big Five | LIWC |
| Evolving | Per-message | Static | Static | Static |
| Entry price | Free (100 users) | $49/mo | $9/mo | $500/mo |
Start building personality-aware AI
Free tier includes 100 profiled users. No credit card required.
Get API Key