pip install nex-sovereign-sdk

The cognitive runtimefor agents that remember how they feel.

HEART maintains an 18-dimensional affect state with per-emotion decay, bidirectional personality coupling, and emotion-gated action. One runtime. Every agent. Persistent across sessions.

Indian Patent Application 202521098101 — Complete Specification Filed
Get API KeySee Documentation
classify.py
from nex_sdk import NexClient
 
nex = NexClient(api_key="nex_sk_...")
result = nex.heart.classify("user_42", "I'm thrilled about this breakthrough!")
200 OK18 emotions classified in 47ms
{
"primary_emotion": "happiness",
"intensity": 0.91,
"valence": 0.88,
"arousal": 0.76,
"emotion_vector": {
"happiness": 0.91, "trust": 0.72, "hope": 0.62,
"surprise": 0.54, "curiosity": 0.45, "anticipation": 0.45,
"pride": 0.38, "awe": 0.33, // ... 10 more
}
}
2 Published Books on AI Consciousness
Complete Spec Filed — Indian Patent 202521098101
18-Dimension Emotion Model
Production API — pip install nex-sovereign-sdk

Three steps to emotional AI

From install to production in minutes, not months.

1

Install the SDK

pip install nex-sovereign-sdk

npm install @nex_sovereign/sdk

2

Classify any text

nex.heart.classify("user", text)

Returns 18-dim emotion vector

3

Build with emotions

Therapy bots, adaptive learning, sentiment beyond positive/negative

Built for products that need to understand people

Every industry that touches human emotion is underserved by binary sentiment analysis.

Mental Health

Real-time emotional state tracking for therapy platforms. 18 emotions instead of binary sentiment — detect nuanced states like hope fading into frustration with underlying fear.

18 emotions vs positive/negative

EdTech

Student engagement monitoring and adaptive content delivery. Detect confusion, frustration, or curiosity in real-time and adjust learning paths automatically.

Adaptive learning via EduPulse

AI Agents

Give your AI emotional memory and contextual awareness. HEART + PDAR reasoning + Memory Graph = agents that understand how users feel and remember why.

HEART + PDAR + Memory Graph
HEART Engine v4

See HEART think.

Type anything. Watch 18 emotions resolve, decay, and compete in real time.

Enter to classify · Shift+Enter for new line

Scroll into view to auto-classify · or type and press Enter

// Sentiment analysis:

{ sentiment: "positive", score: 0.78 }

// HEART Engine v4:

{ hope: 0.71 ↘ sadness: 0.34

envy competing with empathy · conflict resolved }

18
Dimensions
<50ms
Classification
Real
Decay + Blending

Classify is just the entry point

The full cognitive OS powers autonomous emotional agents with reasoning, memory, beliefs, and governance.

INPUT
Text / Speech
ENGINE
HEART v4
OUTPUT
18-Dim Emotion Vector

PDAR Reasoning

Perceive → Decide → Act → Reflect. Transparent, auditable decision-making.

Memory Graph

Persistent semantic memory with emotionally-biased retrieval across sessions.

Belief Engine

Conflict resolution and safety gating for belief formation and updates.

Executive Engine

Autonomous cognitive cycles — goal prioritization and event-driven triggers.

Simple, transparent pricing

Start free. Scale when you're ready.

Free

$0

Start building with emotional AI today.

  • 1,000 classify calls/month
  • 1 API key
  • 18-emotion vector response
  • Community support
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$49/mo

For products going to production.

  • 50,000 calls/month
  • 5 API keys
  • Webhooks & streaming
  • Priority support
  • Usage analytics dashboard
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Enterprise

Custom

For teams that need SLAs and scale.

  • Custom call volume
  • Unlimited API keys
  • 99.9% SLA
  • Dedicated support engineer
  • Custom integrations
  • On-premise option
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Free tier. No credit card. Start classifying emotions in 60 seconds.

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