# Nefesh AI

**Canonical:** https://apis.io/providers/nefesh-ai/  
**Website:** https://nefesh.ai/  
**APIs profiled:** 4

Nefesh AI (nefesh.ai) sells a B2B "human state" middleware API for AI agents: POST live biometric signals from any device — heart rate and HRV from a chest strap, webcam rPPG, voice tone, facial expression, text sentiment, plus accepted-but-not-yet-fused glucose, EEG, electrodermal, respiratory, movement and sleep fields — to one endpoint (api.nefesh.ai/v1/ingest) and get back a unified stress score (0-100) mapped to five states with a machine-readable suggested_action and a closed-loop adaptation_effectiveness signal. The same capability is exposed four ways: a REST API with webhooks and a device registry, a hosted Streamable-HTTP MCP server (6 tools, two of them keyless self-provisioning) listed on the official MCP Registry, an A2A agent (4 skills) discovered from a card on mcp.nefesh.ai, and a "Cognitive Compute Router" LLM gateway that rewrites system prompt and temperature from the live state for OpenAI- and Anthropic-shaped clients. It also maintains the open Human State Protocol (HSP 1.0) JSON Schema and an official npm CLI. Positioned as a General Wellness product, not a medical device. No OpenAPI is published for any surface.

## Kin Score — 61.9 / 100 (strong)

Scored 2026-10-09 under rubric 0.23.0. Trend: flat (+0.0 from 61.9).

| Facet | Score |
|---|---|
| Discoverability | 80.0 |
| Contract Quality | 46.0 |
| Contract Governance | 18.2 |
| Operational Transparency | 55.3 |
| Developer Ergonomics | 64.3 |
| Access Clarity | 84.2 |

Regulatory layer — **Health**: 34.4 (matched via tags).

## Agent readiness — 30.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | flavored |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (4)

- **Nefesh Human State API** — REST API on api.nefesh.ai (FastAPI): POST /v1/ingest takes a session_id, an ISO 8601 timestamp and at least one of 35+ signal fields and returns the fused state, stress_score, c...
- **Nefesh Cognitive Compute Router** — LLM gateway on gateway.nefesh.ai that injects the caller's live human state into the request and adjusts temperature before forwarding to an upstream model. Three modes: OpenAI-...
- **Nefesh MCP Server** — Hosted remote MCP server at https://mcp.nefesh.ai/mcp (Streamable HTTP, protocol 2025-06-18, session-id based; serverInfo nefesh 1.26.0). Anonymous initialize and tools/list suc...
- **Nefesh Human State Agent (A2A)** — A2A agent served from the MCP host: card at https://mcp.nefesh.ai/.well-known/agent-card.json, JSON-RPC 2.0 endpoint at POST https://mcp.nefesh.ai/a2a supporting message/send, m...

## MCP servers (1)

- **Nefesh AI MCP Server** — Nefesh runs ONE hosted remote MCP server at https://mcp.nefesh.ai/mcp — Streamable HTTP, protocol revision 2025-06-18, stateful (an Mcp-Session-Id is issued on initialize and re...

## Security (3)

- **Nefesh Ai Authentication** — apiKey/http · 2 schemes
- **Nefesh Ai Domain Security** — TLSv1.3 · HSTS · DMARC
- **Nefesh Ai Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Nefesh Ai Plans Pricing**

## Tags

Company, Biometrics, Human State, Stress Detection, Affective Computing, AI Agents, MCP, A2A, LLM Gateway, Wearables, Digital Health, Middleware

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/nefesh-ai/). Scores are computed from the provider's own public artifacts under a published rubric.