Home Assistant

Home Assistant is an open-source home automation platform developed by the Open Home Foundation. It enables local control and privacy‑first integration of thousands of smart devices, offering a web UI, mobile apps, voice assistants, and extensive automation capabilities. The community‑driven project provides extensive documentation, a vibrant forum, and regular releases, positioning it as a leading solution for DIY smart homes.

Home Assistant is listed with 1 API on the APIs.io network. Tagged areas include Home Automation, Open Source, IoT, Community, and Nonprofit.

Home Assistant’s developer surface includes authentication, changelog, API reference, documentation, getting-started guide, support, engineering blog, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.1/100 thin Agent 5/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Home Automation Open Source IoT CommunityNonprofit

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 32.1/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 3.6 / 17

Operational Transparency 5.8 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.8 / 15

Agent readiness — 5/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your 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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 21.1 — up to +15.8 composite points
Contract Governance scores 0.0 — up to +12.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/home-assistant/apis.yml: open an issue on github.com/api-evangelist/home-assistant to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Home Assistant REST API

The Home Assistant REST API provides endpoints under /api/ for reading states, calling services, firing events, and rendering templates.

Rate Limits 1

Documented rate limits and quota policies.

Home Assistant Rate Limits

0 limits

RATE LIMITS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Home Assistant Authentication

1 scheme

SECURITY

Home Assistant Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Home Assistant Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 7

Authentication, authorization, and security posture

SecurityTxt

Authentication

SecurityTxt

SecurityTxt

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 4

Status, limits, changes, and where to get help

StatusPage

Roadmap

ChangeLog

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: home-assistant
name: Home Assistant
image: https://www.home-assistant.io/images/default-social.png
description: Home Assistant is an open-source home automation platform developed by the Open Home Foundation. It enables local
  control and privacy‑first integration of thousands of smart devices, offering a web UI, mobile apps, voice assistants, and
  extensive automation capabilities. The community‑driven project provides extensive documentation, a vibrant forum, and regular
  releases, positioning it as a leading solution for DIY smart homes.
url: https://raw.githubusercontent.com/api-evangelist/home-assistant/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Home Automation
- Open Source
- IoT
- Community
- Nonprofit
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/home-assistant-status-security.txt
- type: Authentication
  url: authentication/home-assistant-authentication.yml
- type: LLMsTxt
  url: llms/home-assistant-llms.txt
- type: SecurityTxt
  url: well-known/home-assistant-security.txt
- type: SecurityTxt
  url: well-known/home-assistant-home-assistant-security.txt
- type: WellKnown
  url: well-known/home-assistant-well-known.yml
- type: Hosts
  url: hosts/home-assistant-hosts.yml
- type: Vendors
  url: vendors/home-assistant-vendors.yml
- type: SDKs
  url: packages/home-assistant-packages.yml
- type: Packages
  url: packages/home-assistant-packages.yml
- type: TermsOfService
  url: https://www.home-assistant.io/tos/
- type: StatusPage
  url: https://status.home-assistant.io
- type: Security
  url: https://www.home-assistant.io/security/
- type: Roadmap
  url: https://contributors.home-assistant.io/roadmap/
- type: PrivacyPolicy
  url: https://www.home-assistant.io/privacy/
- type: DeveloperPortal
  url: https://www.home-assistant.io/developers/cla/
- type: ChangeLog
  url: https://contributors.home-assistant.io/releases/
- type: APIReference
  url: https://contributors.home-assistant.io/community/reference/events/
- type: VulnerabilityDisclosure
  url: security/home-assistant-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/home-assistant-domain-security.yml
- type: Website
  url: https://www.home-assistant.io/
- type: Documentation
  url: https://www.home-assistant.io/docs
- type: GettingStarted
  url: https://www.home-assistant.io/getting-started
- type: Support
  url: https://www.home-assistant.io/help
- type: Blog
  url: https://www.home-assistant.io/blog
- type: GitHubOrganization
  url: https://github.com/home-assistant
apis:
- name: Home Assistant REST API
  description: The Home Assistant REST API provides endpoints under /api/ for reading states, calling services, firing events,
    and rendering templates.
  humanURL: https://contributors.home-assistant.io/core/internals/rest-api/
  baseURL: https://homeassistant.local:8123/api/
  aid: home-assistant:home-assistant-rest-api
x-submission-probe: 301 (-> https://www.home-assistant.io/) 2026-10-25
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 16
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Home Assistant API — frequently asked questions

Does Home Assistant have an API?

Yes. APIs.io lists 1 API from Home Assistant, including Home Assistant REST API.

How do I authenticate with the Home Assistant API?

Home Assistant uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Home Assistant Authentication.

Is the Home Assistant API ready for AI agents?

Home Assistant has a Kin Score of 32.1 out of 100 (thin) and an Agent Readiness score of 5.0 (human-only), scored by API Evangelist on 2026-10-31.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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