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 is listed with 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 📡 Profile data on GitHub

25.5/100 emerging ▬ flat Agent 15/100 agent aware Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers 1 Agent Skills

Company Commerce E-Commerce Retail Pet Supplies Agentic Commerce Universal Commerce Protocol MCP Shopify

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 25.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.2 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 15/100 · 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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

8 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
Developer Ergonomics scores 30.4 — up to +13.9 composite points
Access Clarity scores 34.2 — up to +13.2 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/petstorecom/apis.yml: open an issue on github.com/api-evangelist/petstorecom 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Veterinary & Pet Care	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (platform)

Universal Commerce Protocol (UCP)

measured — observed by APIs.io (shopify)

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

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

Petstore.com agent-driven shopping and checkout

AGENT SKILL

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: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  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
- Universal Commerce Protocol
- 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
  - Universal Commerce Protocol
  - MCP
  tags_raw:
  - 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
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: ucp
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

Petstore.com API — frequently asked questions

Does Petstore.com have an API?

Yes. APIs.io lists 1 API from Petstore.com, including Petstore.com Commerce (UCP/MCP).

How do I authenticate with the Petstore.com API?

Petstore.com documents its authentication (oauth2/openIdConnect · 1 scheme). The details are profiled on APIs.io as Petstorecom Authentication.

Does Petstore.com have an MCP server?

Yes. APIs.io lists 1 MCP server for Petstore.com: 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-approved checkout on this

Is the Petstore.com API ready for AI agents?

Petstore.com has a Kin Score of 25.5 out of 100 (emerging) and an Agent Readiness score of 14.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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