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.
Nefesh AI is listed with 4 APIs on the APIs.io network. Tagged areas include Company, Biometrics, Human State, Stress Detection, and Affective Computing.
The Nefesh AI catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Nefesh AI’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, CLI, authentication, and 33 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Health regime, so
Regulatory Posture carries 15 points of the composite.
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provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/nefesh-ai: open an issue to ask a question, or submit a pull request to add artifacts.
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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...
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-...
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...
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...
aid: nefesh-ai
name: Nefesh AI
description: '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.'
deliveryModel:
model: saas
license_evidence:
not_product:
- nefesh-ai/nefesh-a2a
- nefesh-ai/nefesh-examples
- nefesh-ai/nefesh-gateway
- nefesh-ai/nefesh-mcp-server
open_source: unknown
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: low
source:
- pricing
- repository-not-product
generated: '2026-09-25'
method: derived
image: https://nefesh.ai/icon.svg
url: https://raw.githubusercontent.com/api-evangelist/nefesh-ai/refs/heads/main/apis.yml
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pipeline local-v3, 2026-09-19
x-aliases:
- Nefesh
- nefesh.ai
- Nefesh AI Ltd
- Nefesh Human State Agent
position: Producing
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Company
- Biometrics
- Human State
- Stress Detection
- Affective Computing
- AI Agents
- MCP
- A2A
- LLM Gateway
- Wearables
- Digital Health
- Middleware
apis:
- name: Nefesh Human State API
description: '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, confidence, suggested_action and (from the second
call) adaptation_effectiveness; GET /v1/state, GET /v1/history (1-60 minute lookback), GET /v1/triggers (per-subject trigger
memory), POST/GET/DELETE /v1/devices (device registry), DELETE /v1/subjects/{subject_id} (GDPR cascading deletion), POST
/webhooks/register and /webhooks/retries. Device-optimised ingest routes at /ingest/rppg, /ingest/polar, /ingest/garmin.
Authenticated with the X-Nefesh-Key header (keys prefixed nfsh_). Response format is the open Human State Protocol. No
OpenAPI is published; api.nefesh.ai/openapi.json and /docs are 404 and a custom HTML page respectively.'
image: https://nefesh.ai/icon.svg
humanURL: https://nefesh.ai/docs/api
baseURL: https://api.nefesh.ai
tags:
- Biometrics
- Stress Detection
- Human State
- Webhook
- Device Registry
tags_raw:
- Biometrics
- Stress Detection
- Human State
- Webhooks
- Device Registry
properties:
- type: APIReference
url: https://nefesh.ai/docs/api
- type: Documentation
url: https://nefesh.ai/docs
- type: GettingStarted
url: https://nefesh.ai/docs/quickstart
- type: Documentation
name: POST /v1/ingest full field reference
url: https://nefesh.ai/docs/v1-ingest
- type: Documentation
name: State mapping (score bands and suggested_action)
url: https://nefesh.ai/docs/states
- type: JSONSchema
name: Human State Protocol 1.0 response schema (first-party, Apache 2.0)
url: json-schema/nefesh-ai-hsp-1.0.schema.json
- type: Webhooks
url: asyncapi/nefesh-ai-webhooks.yml
- type: Webhooks
name: Webhooks documentation (state_change)
url: https://nefesh.ai/docs/webhooks
- type: Authentication
url: authentication/nefesh-ai-authentication.yml
- type: ErrorCatalog
url: errors/nefesh-ai-problem-types.yml
- type: DataModel
url: data-model/nefesh-ai-data-model.yml
- type: SourceCode
name: Integration examples (curl, Python, JavaScript)
url: https://github.com/nefesh-ai/nefesh-examples
- type: X-Health
url: https://api.nefesh.ai/health
- name: Nefesh Cognitive Compute Router
description: '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-compatible POST /v1/chat/completions, Anthropic
passthrough POST /v1/messages, and Unified Anthropic (Anthropic format to any OpenAI-shaped backend). Eleven documented
backends selected with the X-LLM-Backend header; the caller supplies X-Nefesh-Key, X-LLM-Key and X-Nefesh-Subject (or
legacy X-Nefesh-Session). Responses carry X-Nefesh-Adapted, X-Nefesh-State, X-Nefesh-Backend and X-Nefesh-Reason. Degrades
gracefully to a plain passthrough when no signal exists. Source is published; no OpenAPI (gateway.nefesh.ai/openapi.json
is 404).'
image: https://nefesh.ai/icon.svg
humanURL: https://nefesh.ai/docs/gateway
baseURL: https://gateway.nefesh.ai
tags:
- LLM Gateway
- Proxy
- Human State
- OpenAI-Compatible
tags_raw:
- LLM Gateway
- Proxy
- Human State
- OpenAI Compatible
properties:
- type: Documentation
url: https://nefesh.ai/docs/gateway
- type: SourceCode
url: https://github.com/nefesh-ai/nefesh-gateway
- type: X-Health
url: https://gateway.nefesh.ai/health
- name: Nefesh MCP Server
description: 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 succeed and return six tools with full inputSchemas — get_human_state,
ingest, get_trigger_memory, get_session_history, request_api_key and check_api_key_status. The last two work with no key
and let an agent self-provision a free key by email verification; the other four call the REST API with the X-Nefesh-Key
header and return an in-band error without one. Published to the official MCP Registry as ai.nefesh/human-state (server.json
in the source repo), and listed on Smithery and Glama. No stdio package is shipped.
image: https://nefesh.ai/icon.svg
humanURL: https://nefesh.ai/docs/mcp
baseURL: https://mcp.nefesh.ai/mcp
tags:
- MCP
- AI Agents
- Human State
properties:
- type: MCPServer
url: mcp/nefesh-ai-mcp.yml
- type: MCPServer
name: Live Streamable HTTP endpoint
url: https://mcp.nefesh.ai/mcp
- type: X-MCPToolsList
name: Verbatim tools/list response (6 tools with inputSchema)
url: mcp/nefesh-ai-mcp-tools.json
- type: X-MCPServerCard
name: Served /.well-known/mcp.json self-description (verbatim)
url: well-known/nefesh-ai-mcp-server-card.json
- type: Documentation
url: https://nefesh.ai/docs/mcp
- type: Documentation
name: MCP tools reference
url: https://nefesh.ai/docs/mcp/tools
- type: SourceCode
url: https://github.com/nefesh-ai/nefesh-mcp-server
- type: X-MCPRegistry
name: ai.nefesh/human-state on the official MCP Registry
url: https://registry.modelcontextprotocol.io/v0/servers?search=nefesh
- name: Nefesh Human State Agent (A2A)
description: '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, message/sendStream, tasks/get and tasks/cancel. Four
skills — get-human-state, ingest-signals, get-trigger-memory, get-session-history — the same capability set as the MCP
tools. Authentication is X-Nefesh-Key or Authorization: Bearer; an unauthenticated message/send returns a completed Task
whose artifact carries the auth error rather than a JSON-RPC error. The card is 0.2-era in shape (schemaVersion/agentVersion/authSchemes,
no protocolVersion) and grades flavored against A2A 1.0.0.'
image: https://nefesh.ai/icon.svg
humanURL: https://nefesh.ai/docs/a2a
baseURL: https://mcp.nefesh.ai/a2a
tags:
- A2A
- AI Agents
- Human State
properties:
- type: AgentCard
url: a2a/nefesh-ai-a2a.yml
- type: AgentCard
name: Served agent card
url: https://mcp.nefesh.ai/.well-known/agent-card.json
- type: Documentation
url: https://nefesh.ai/docs/a2a
- type: SourceCode
url: https://github.com/nefesh-ai/nefesh-a2a
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
common:
- type: Website
url: https://nefesh.ai/
- type: DeveloperPortal
url: https://nefesh.ai/docs
- type: Documentation
url: https://nefesh.ai/docs
- type: APIReference
url: https://nefesh.ai/docs/api
- type: GettingStarted
url: https://nefesh.ai/docs/quickstart
- type: Pricing
url: https://nefesh.ai/pricing
- type: SignUp
url: https://nefesh.ai/signup
- type: TermsOfService
url: https://nefesh.ai/terms
- type: PrivacyPolicy
url: https://nefesh.ai/docs/privacy
- type: GitHubOrganization
url: https://github.com/nefesh-ai
- type: Compliance
name: Regulatory position — General Wellness product; GDPR/BDSG, BIPA and HIPAA statements (no certifications; SOC 2 "in
progress")
url: https://nefesh.ai/docs/regulatory
- type: X-Enterprise
url: https://nefesh.ai/enterprise
- type: X-Demo
name: Live browser demo (rPPG + AI chat, no signup)
url: https://sandbox.nefesh.ai
- type: LLMsTxt
url: llms/nefesh-ai-llms.txt
- type: LLMsTxt
name: Provider-hosted llms.txt
url: https://nefesh.ai/llms.txt
- type: AgentCard
url: a2a/nefesh-ai-a2a.yml
- type: MCPServer
url: mcp/nefesh-ai-mcp.yml
- type: WellKnown
url: well-known/nefesh-ai-well-known.yml
- type: SecurityTxt
url: well-known/nefesh-ai-security.txt
- type: JSONSchema
name: Human State Protocol 1.0 (HSP) schema
url: json-schema/nefesh-ai-hsp-1.0.schema.json
- type: Packages
url: packages/nefesh-ai-packages.yml
- type: CLI
url: cli/nefesh-ai-cli.yml
- type: Conformance
url: conformance/nefesh-ai-conformance.yml
- type: ErrorCatalog
url: errors/nefesh-ai-problem-types.yml
- type: Lifecycle
url: lifecycle/nefesh-ai-lifecycle.yml
- type: Authentication
url: authentication/nefesh-ai-authentication.yml
- type: Conventions
url: conventions/nefesh-ai-conventions.yml
- type: Sandbox
url: sandbox/nefesh-ai-sandbox.yml
- type: Plans
url: plans/nefesh-ai-plans-pricing.yml
- type: RateLimits
url: rate-limits/nefesh-ai-rate-limits.yml
- type: DataModel
url: data-model/nefesh-ai-data-model.yml
- type: Webhooks
url: asyncapi/nefesh-ai-webhooks.yml
- type: X-RegulatoryPosture
url: regulatory/nefesh-ai-regulatory-posture.yml
- type: DataSubjectRequest
url: regulatory/nefesh-ai-regulatory-posture.yml
- type: DataResidency
url: regulatory/nefesh-ai-regulatory-posture.yml
- type: VulnerabilityDisclosure
url: security/nefesh-ai-vulnerability-disclosure.yml
- type: Security
name: RFC 9116 security.txt — Contact security@nefesh.ai, Policy https://nefesh.ai/terms
url: https://nefesh.ai/.well-known/security.txt
- type: DomainSecurity
url: security/nefesh-ai-domain-security.yml
- type: X-Robots
url: https://nefesh.ai/robots.txt
- type: X-Sitemap
url: https://nefesh.ai/sitemap.xml
x-enrichment:
date: '2026-09-19'
status: enriched
artifacts_added: 24
pass: local-v3
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