Petstore.com

Petstore.com is an online pet-supplies store built on Shopify that exposes a first-class agent commerce surface. Alongside the human storefront it implements the Universal Commerce Protocol (UCP) over the Model Context Protocol (MCP) at /api/ucp/mcp, publishes a /.well-known/ucp merchant profile and a /agents.md (mirrored as /llms.txt) describing how AI agents can search the catalog, build a cart, and drive a buyer-approved checkout. Buyer identity uses Shopify Customer Account OpenID Connect, payment is handled by Google Pay and Shopify card handlers, and every checkout requires contemporaneous human approval. Read-only storefront browsing (products, collections, search, sitemap) needs no auth. Added to the API Evangelist network as a Battery Ventures portfolio lead; enriched from the store's live agent-facing surface.

Petstore.com publishes 1 API on the APIs.io network. Tagged areas include Company, Commerce, E-Commerce, Retail, and Pet Supplies.

Petstore.com’s developer surface includes documentation, authentication, support, engineering blog, signup flow, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

22.7/100 emerging ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs 1 MCP Servers

Company Commerce E-Commerce Retail Pet Supplies Agentic Commerce UCP MCP Shopify

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 22.7/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 6.1 / 20

Access Clarity 6.8 / 20

Operational Transparency 0.0 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 21/100 · 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 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 5 / 5

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.

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/petstorecom: open an issue to ask a question, or submit a pull request to add artifacts. 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.

Petstore.com Commerce (UCP/MCP)

Agent-facing commerce endpoint for the Petstore.com Shopify store, implemented via the Universal Commerce Protocol (UCP) over MCP — catalog search, cart, and buyer-approved chec...

MCP Servers 1

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

Petstore.com MCP Server

Petstore.com's agent-facing commerce endpoint, implemented via the Universal Commerce Protocol (UCP) over MCP. Lets agents search the catalog, build a cart, and drive a buyer-ap...

MCP SERVER

Security Posture 2

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

Petstorecom Authentication

oauth2/openIdConnect · 1 scheme

SECURITY

Petstorecom Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Petstorecom Scopes

4 scopes · authorizationCode

4 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

WellKnown

LLMsTxt

AgentSkill

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Conformance

Conformance

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 1

Status, limits, changes, and where to get help

Support

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 1

Properties that don't map to a standard resource type

OpenIDConnect

OpenIDConnect

Source (apis.yml)

aid: petstorecom
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
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/petstorecom.png
name: Petstore.com
description: Petstore.com is an online pet-supplies store built on Shopify that exposes a first-class agent commerce surface.
  Alongside the human storefront it implements the Universal Commerce Protocol (UCP) over the Model Context Protocol (MCP)
  at /api/ucp/mcp, publishes a /.well-known/ucp merchant profile and a /agents.md (mirrored as /llms.txt) describing how AI
  agents can search the catalog, build a cart, and drive a buyer-approved checkout. Buyer identity uses Shopify Customer Account
  OpenID Connect, payment is handled by Google Pay and Shopify card handlers, and every checkout requires contemporaneous
  human approval. Read-only storefront browsing (products, collections, search, sitemap) needs no auth. Added to the API Evangelist
  network as a Battery Ventures portfolio lead; enriched from the store's live agent-facing surface.
url: https://raw.githubusercontent.com/api-evangelist/petstorecom/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Commerce
- E-Commerce
- Retail
- Pet Supplies
- Agentic Commerce
- UCP
- MCP
- Shopify
tags_raw:
- Company
- Commerce
- E-commerce
- Retail
- Pet Supplies
- Agentic Commerce
- UCP
- MCP
- Shopify
apis:
- name: Petstore.com Commerce (UCP/MCP)
  description: Agent-facing commerce endpoint for the Petstore.com Shopify store, implemented via the Universal Commerce Protocol
    (UCP) over MCP — catalog search, cart, and buyer-approved checkout.
  humanURL: https://petstore.com/agents.md
  baseURL: https://petstore.com/api/ucp/mcp
  tags:
  - Commerce
  - Agentic Commerce
  - UCP
  - MCP
  properties:
  - type: MCPServer
    url: mcp/petstorecom-mcp.yml
  - type: Documentation
    url: https://petstore.com/agents.md
  - type: LLMsTxt
    url: llms/petstorecom-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/petstorecom-domain-security.yml
- type: Website
  url: https://petstore.com
- type: Documentation
  url: https://petstore.com/agents.md
- type: MCPServer
  url: mcp/petstorecom-mcp.yml
- type: WellKnown
  url: well-known/petstorecom-well-known.yml
- type: LLMsTxt
  url: llms/petstorecom-llms.txt
- type: Authentication
  url: authentication/petstorecom-authentication.yml
- type: OpenIDConnect
  url: well-known/petstorecom-openid-configuration.json
- type: OAuthScopes
  url: scopes/petstorecom-scopes.yml
- type: Conventions
  url: conventions/petstorecom-conventions.yml
- type: Conformance
  url: conformance/petstorecom-conformance.yml
- type: AgentSkill
  url: skills/petstorecom-agentic-checkout.md
- type: TermsOfService
  url: https://petstore.com/policies/terms-of-service
- type: PrivacyPolicy
  url: https://petstore.com/policies/privacy-policy
- type: Support
  url: https://petstore.com/pages/contact
- type: Blog
  url: https://petstore.com/blogs/news
- type: SignUp
  url: https://petstore.com/account/register
- type: Login
  url: https://petstore.com/account/login
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 4
  pass: local-v1

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