Maisonette

Maisonette is a New York-based online marketplace for babies and children, founded in 2017 by Sylvana Ward Durrett and Luisana Mendoza de Roccia, selling clothing, toys, furniture and decor for ages 0-12 from a curated network of independent boutiques and 800+ brands. It is a marketplace rather than a single seller: each item ships directly from its brand and is returned separately. Maisonette publishes no OpenAPI and runs no developer program, but its Shopify-hosted storefront exposes a real, live, unauthenticated agent surface — a Universal Commerce Protocol MCP endpoint with thirteen catalog, cart, checkout and order tools, a five-tool storefront MCP endpoint, an llms.txt and agents.md with explicit agent instructions, an agent-discovery sitemap, and OAuth 2.0/OIDC and RFC 9728 discovery documents served from its own host.

Maisonette publishes 2 APIs on the APIs.io network. Tagged areas include Company, Retail, E-Commerce, Marketplace, and Shopping.

Maisonette’s developer surface includes documentation, authentication, support, signup flow, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub
22.2/100 emerging ▬ flat Agent 16/100 agent aware saas Full breakdown ↓
scored 2026-09-01 · rubric v0.17.2
2 APIs 1 MCP Servers
CompanyRetailE-CommerceMarketplaceShoppingChildrenBabyApparelHomesAgentic CommerceMCPUniversal Commerce ProtocolShopify

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-01 · rubric v0.17.2
Composite quality — 22.2/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 5.6 / 20
Access Clarity 6.8 / 20
Operational Transparency 0.0 / 13
Contract Governance 2.2 / 12
Discoverability 7.6 / 10
Agent readiness — 16/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 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 Surface 5 / 5
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/maisonette: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

Maisonette UCP Commerce MCP

Maisonette's agent-facing commerce surface: a Universal Commerce Protocol (2026-04-08) MCP server exposing thirteen tools across catalog search and lookup, cart, checkout and or...

Maisonette Storefront MCP

The lighter read-and-cart Shopify Storefront MCP surface on Maisonette's own host — five anonymous tools covering catalog search, product detail, cart read and update, and a gro...

MCP Servers 1

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

Maisonette MCP Server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Maisonette Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Maisonette Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Maisonette Authentication

5 schemes

SECURITY

Maisonette Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Maisonette Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp
SignUp

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 WellKnown
WellKnown
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 Idempotency
Idempotency
 DataModel
DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

Packages
Packages

Access & Security 3

Authentication, authorization, and security posture

Authentication
Authentication
 OAuthScopes
OAuthScopes
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits
RateLimits
 Support
Support
 HelpCenter
HelpCenter

Commercial 3

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: maisonette
name: Maisonette
description: 'Maisonette is a New York-based online marketplace for babies and children, founded in 2017 by Sylvana Ward Durrett
  and Luisana Mendoza de Roccia, selling clothing, toys, furniture and decor for ages 0-12 from a curated network of independent
  boutiques and 800+ brands. It is a marketplace rather than a single seller: each item ships directly from its brand and
  is returned separately. Maisonette publishes no OpenAPI and runs no developer program, but its Shopify-hosted storefront
  exposes a real, live, unauthenticated agent surface — a Universal Commerce Protocol MCP endpoint with thirteen catalog,
  cart, checkout and order tools, a five-tool storefront MCP endpoint, an llms.txt and agents.md with explicit agent instructions,
  an agent-discovery sitemap, and OAuth 2.0/OIDC and RFC 9728 discovery documents served from its own host.'
url: https://raw.githubusercontent.com/api-evangelist/maisonette/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
image: https://www.maisonette.com/cdn/shop/files/Favicon_Maisonette_ac4c0de7-1fd8-4114-b034-f15a8d57ac59.png?v=1776358749&width=512
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-25'
modified: '2026-08-25'
tags:
- Company
- Retail
- E-Commerce
- Marketplace
- Shopping
- Children
- Baby
- Apparel
- Homes
- Agentic Commerce
- MCP
- Universal Commerce Protocol
- Shopify
tags_raw:
- Company
- Retail
- E-Commerce
- Marketplace
- Shopping
- Children
- Baby
- Apparel
- Home
- Agentic Commerce
- MCP
- Universal Commerce Protocol
- Shopify
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Maisonette UCP Commerce MCP
  description: 'Maisonette''s agent-facing commerce surface: a Universal Commerce Protocol (2026-04-08) MCP server exposing
    thirteen tools across catalog search and lookup, cart, checkout and order. tools/list answers 200 with no credentials;
    tool calls require the caller to supply its own published agent-profile URI, and completing a checkout requires both an
    idempotency key and contemporaneous buyer approval. Announced by the store''s own llms.txt and /.well-known/ucp.'
  humanURL: https://www.maisonette.com/agents.md
  baseURL: https://www.maisonette.com/api/ucp/mcp
  tags:
  - MCP
  - Agentic Commerce
  - Universal Commerce Protocol
  - Checkout
  - Catalog
  properties:
  - type: MCPServer
    url: mcp/maisonette-mcp.yml
  - type: Documentation
    url: https://www.maisonette.com/agents.md
  - type: LLMsTxt
    url: https://www.maisonette.com/llms.txt
- name: Maisonette Storefront MCP
  description: The lighter read-and-cart Shopify Storefront MCP surface on Maisonette's own host — five anonymous tools covering
    catalog search, product detail, cart read and update, and a grounded search over the store's policies and FAQs. Not named
    in llms.txt; discovered by probing the conventional Shopify path.
  humanURL: https://www.maisonette.com/agents.md
  baseURL: https://www.maisonette.com/api/mcp
  tags:
  - MCP
  - Catalog
  - Support
  properties:
  - type: MCPServer
    url: mcp/maisonette-mcp.yml
common:
- type: Website
  url: https://www.maisonette.com/
- type: Documentation
  url: https://www.maisonette.com/agents.md
- type: LLMsTxt
  url: llms/maisonette-llms.txt
- type: MCPServer
  url: mcp/maisonette-mcp.yml
- type: WellKnown
  url: well-known/maisonette-well-known.yml
- type: Authentication
  url: authentication/maisonette-authentication.yml
- type: OAuthScopes
  url: scopes/maisonette-scopes.yml
- type: Conformance
  url: conformance/maisonette-conformance.yml
- type: ErrorCatalog
  url: errors/maisonette-problem-types.yml
- type: Lifecycle
  url: lifecycle/maisonette-lifecycle.yml
- type: Conventions
  url: conventions/maisonette-conventions.yml
- type: Idempotency
  url: conventions/maisonette-conventions.yml
- type: DataModel
  url: data-model/maisonette-data-model.yml
- type: RateLimits
  url: rate-limits/maisonette-rate-limits.yml
- type: Plans
  url: plans/maisonette-plans-pricing.yml
- type: Packages
  url: packages/maisonette-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/maisonette-domain-security.yml
- type: Support
  url: https://www.maisonette.com/pages/contact
- type: HelpCenter
  url: https://www.maisonette.com/pages/faq
- type: TermsOfService
  url: https://www.maisonette.com/policies/terms-of-service
- type: PrivacyPolicy
  url: https://www.maisonette.com/policies/privacy-policy
- type: SignUp
  url: https://www.maisonette.com/account/register
x-enrichment:
  date: '2026-08-25'
  status: enriched
  artifacts_added: 24
  pass: local-v1

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