Give your AI a soul
The infrastructure layer that makes AI feel like someone. Memory, emotion, initiative—all via API.
Free tier available. Start building in minutes.
How It Works
Add identity to any AI
Promitheus sits between your application and your LLM, providing the context that makes AI feel like someone.
Your App
User message
Promitheus
Context + Memory + Emotion
Any LLM
Personal response
Use Cases
Build AI that connects
Any application where your AI needs to feel like someone, not just something.
AI Companions
Build companions that form genuine bonds over time—remembering important dates, noticing emotional patterns, and reaching out proactively.
Video Game NPCs
Characters that remember every player choice and form real opinions. Merchants who reward loyalty. Rivals who hold grudges.
Education & Tutoring
Tutors that understand learning styles, remember struggles, and adapt their approach—not just their content.
Social Robots
Physical robots that develop real relationships. Elderly care companions that know family stories and routines.
Creative Writing
AI collaborators that remember characters, maintain story consistency, and match your writing style.
Customer Experience
Support agents that remember history and preferences. No more re-explaining the same problem.
Capabilities
Everything you need
The complete toolkit for making AI that feels like someone.
Deep user modeling
Comprehensive profiles including attachment style, communication preferences, emotional patterns, and relationship needs.
Relationship state tracking
Real-time relationship metrics: trust, closeness, interaction patterns, and relationship health over time.
Entity emotional state
Your AI maintains its own emotional state that persists and evolves based on interactions and relationship quality.
Episodic memory
Rich memory storage with emotional weight, automatic relevance ranking, and intelligent retrieval.
Proactive thoughts
Your AI generates thoughts between conversations. Deliver via webhooks for genuine check-ins and initiative.
Context generation
One API call returns everything your LLM needs: relevant memories, relationship state, user psychology, entity feelings.
Integration
Simple API, powerful results
One API call. Everything your AI needs to be someone.
// Get full relationship context for your LLM
const response = await fetch('https://api.promitheus.ai/v1/context', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
entity_id: 'companion_aria',
user_id: 'user_123',
message: "Hey, how are you?"
})
});
const context = await response.json();
// context includes:
// - user_profile: attachment style, preferences, psychology
// - relationship_state: trust, closeness, history
// - entity_state: current emotions, feelings about user
// - relevant_memories: emotionally weighted, ranked
// - proactive_thoughts: what the entity has been thinkingUser Profile
Attachment style, communication preferences, emotional patterns
Relationship State
Trust level, closeness score, interaction history
Entity State
Current emotions, feelings about user, proactive thoughts
Pricing
Start free, scale as you grow
Simple, usage-based pricing. No hidden fees.
Free
For experimentation and development
- 1,000 API calls/month
- 10 entities
- Community support
Pro
For production applications
- 50,000 API calls/month
- Unlimited entities
- Webhook delivery
- Email support
Enterprise
For high-volume and custom needs
- Unlimited API calls
- Custom integrations
- SLA guarantee
- Dedicated support
Start building today
Give your AI memory, emotion, and initiative. Make it feel like someone.