A-du, LLC

A-du is a marketplace built around Accessory Dwelling Units (ADUs), operating in Los Angeles County, San Francisco, San Diego County and New York City. Rent or list a permit-verified ADU, a house or a room; manage the tenancy; or choose a pre-approved ADU plan, test it on your lot, estimate permit fees and hire licensed professionals directly. A-du does not design, permit or build ADUs.

A-du, LLC is listed with 1 API on the APIs.io network: A-du API. Tagged areas include Real Estate, Property Management, ADU, Rentals, and Construction.

A-du, LLC’s developer surface includes API reference, pricing, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

23.4/100 emerging ▬ flat Agent 31/100 agent ready Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessOpen

1 API 1 MCP Servers

Real Estate Property Management ADU Rentals Construction

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 23.4/100 · emerging

Contract Quality 5.1 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 5.7 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 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 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 24.0 — up to +19.0 composite points
Developer Ergonomics scores 9.5 — up to +18.1 composite points
Access Clarity scores 31.6 — up to +13.7 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/a-du-homes/apis.yml: open an issue on github.com/api-evangelist/a-du-homes 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 →

Standards implemented 4

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

A-du API

REST API for A-du marketplace providing ADU rentals, listings, plans, and services.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

A-du, LLC MCP Server

Remote MCP server at a-du.homes.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

A Du Homes Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

A Du Homes Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

A Du Homes Authentication

0 schemes

SECURITY

A Du Homes Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

A Du Homes Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: a-du-homes
name: A-du, LLC
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-02'
  method: derived
image: https://a-du.homes/og-horton-house.jpg
description: A-du is a marketplace built around Accessory Dwelling Units (ADUs), operating in Los Angeles County, San Francisco,
  San Diego County and New York City. Rent or list a permit-verified ADU, a house or a room; manage the tenancy; or choose
  a pre-approved ADU plan, test it on your lot, estimate permit fees and hire licensed professionals directly. A-du does not
  design, permit or build ADUs.
url: https://artifacts.apis.io/a-du-homes/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Real Estate
- Property Management
- ADU
- Rentals
- Construction
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Conformance
  url: conformance/a-du-homes-conformance.yml
- type: LLMsTxt
  url: llms/a-du-homes-llms.txt
- type: AgentCard
  url: a2a/a-du-homes-a2a.yml
- type: ToolCrosswalk
  url: mcp/a-du-homes-tool-crosswalk.yml
- type: MCPServer
  url: mcp/a-du-homes-mcp.yml
- type: WellKnown
  url: well-known/a-du-homes-well-known.yml
- type: Hosts
  url: hosts/a-du-homes-hosts.yml
- type: Vendors
  url: vendors/a-du-homes-vendors.yml
- type: Newsroom
  url: https://a-du.homes/press
- type: DomainSecurity
  url: security/a-du-homes-domain-security.yml
- type: Website
  url: https://a-du.homes/
- type: APIReference
  url: https://a-du.homes/openapi.json
- type: Pricing
  url: https://a-du.homes/pricing
- type: Blog
  url: https://a-du.homes/blog
- type: TermsOfService
  url: https://a-du.homes/terms
- type: PrivacyPolicy
  url: https://a-du.homes/privacy
apis:
- name: A-du API
  description: REST API for A-du marketplace providing ADU rentals, listings, plans, and services.
  humanURL: https://a-du.homes/openapi.json
  baseURL: https://a-du.homes
  properties:
  - type: OpenAPI
    url: https://a-du.homes/openapi.json
  aid: a-du-homes:a-du-api
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 26
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

A-du, LLC API — frequently asked questions

Does A-du, LLC have an API?

Yes. APIs.io lists 1 API from A-du, LLC, including A-du API.

Is there an OpenAPI specification for the A-du, LLC API?

Yes. APIs.io indexes 1 OpenAPI specification for A-du, LLC, each linked for download from this page.

How do I authenticate with the A-du, LLC API?

A-du, LLC documents its authentication (0 schemes). The details are profiled on APIs.io as A Du Homes Authentication.

Does A-du, LLC have an MCP server?

Yes. APIs.io lists 1 MCP server for A-du, LLC: Remote MCP server at a-du.homes.

Is the A-du, LLC API ready for AI agents?

A-du, LLC has a Kin Score of 23.4 out of 100 (emerging) and an Agent Readiness score of 31.2 (agent-ready), scored by API Evangelist on 2026-11-02.

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