The first nervous system for AI.
Every AI reads text. None reads the human behind it in real time. Nefesh changes that. Any device that reads the body works with Nefesh. Chest strap, smartwatch, webcam, glucose monitor, or your own hardware. Live signal fusion, one API, and your AI adapts to the human instantly. Built for telehealth, coaching, and adaptive learning.
Or try the live demo. No signup required.
That's worth unpacking. Let's look at what's on your plate — listing things out often reveals it's more manageable than it feels. What are the top three things?
{ "state": "relaxed", "score": 28 }
See the difference.
Same user message. Different physiological state. Different AI response.
Same input · Different physiology · Different AI
Integration
Three ways to integrate.
From zero-code gateway to full API control. Pick the integration that fits your stack.
Cognitive Compute Router
Change one URL. Your LLM adapts automatically.
- ✓3 integration modes (OpenAI, Anthropic native, Unified)
- ✓11 LLM providers supported
- ✓Zero code changes required
MCP + A2A
Your AI agent reads human state natively.
- ✓6 MCP tools for Claude, Cursor, VS Code + 15 more
- ✓4 A2A skills for agent-to-agent collaboration
- ✓Self-provisioning: no signup needed
Direct API + CLI
Full control. One endpoint for every signal.
- ✓35+ signal types from any device or sensor
- ✓Device Registry: register once, never manage sessions
- ✓CLI: npm install -g @nefesh/cli
Why Nefesh.
Not another health API. A fusion engine built on signal science.
Change one URL. Your LLM adapts to the human.
Point your LLM base URL to gateway.nefesh.ai. The gateway reads biometric state, adjusts the system prompt, and forwards to your provider. Three modes: OpenAI-compatible, Anthropic native, and Unified Anthropic for any backend. 11 LLM providers supported. Zero code changes on the app side.
One call. Every signal. One state.
Heart rate alone is noisy. Voice alone lies. Expression alone is ambiguous. Nefesh fuses them all: cardiovascular, vocal, visual, and textual signals. One unified state per API call. No other service does this.
Register once. Never manage sessions again.
Bind a wearable to a user with one API call. After that, send data with just the device ID. The API resolves the user automatically. No session IDs, no manual mapping, no state management on your side.
Your AI learns what actually works.
On every call after the first, Nefesh tells the AI whether its previous approach actually reduced stress. Did simplifying the response help? Should it try something different? No other system provides this feedback loop.
Your AI remembers what stresses the user.
Nefesh tracks which conversation topics cause stress across turns and sessions. When a resolved trigger reappears, the AI knows to explore deeper. When an active trigger surfaces, the AI knows to tread carefully.
ACTIVE: relationship — extra care.
RESOLVED: work deadline — can explore deeper.
Solutions
Built for regulated industries.
Nefesh is used by development teams building telehealth platforms, AI coaching tools, workplace wellness programs, and adaptive learning systems. If your product interacts with humans under stress, Nefesh gives your AI the context to respond appropriately.