Primary

Primary (Primary Kids, Inc.) is a direct-to-consumer children's apparel brand selling simple, slogan-free, mix-and-match clothing "in all colors, for all kids" — babies through age 14, plus adult sizes, swimwear, school uniforms and licensed Sesame Street collaborations. The company operates a Shopify-hosted online store at primary.com and is a portfolio company of Homebrew. Primary has no first-party developer API, but its storefront is agent-accessible: it serves a live hosted Shopify Storefront MCP server (catalog search, product lookup, cart, checkout, policy/FAQ lookup) and exposes Shopify's Customer Account API (OAuth2/OIDC) for customer-scoped operations, along with a published llms.txt agent-instructions document.

Primary is profiled on the APIs.io network. Tagged areas include Company, Consumer, Retail, Ecommerce, and Apparel.

Primary’s developer surface includes authentication and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.7/100 minimal ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

0 APIs 1 MCP Servers

CompanyConsumerRetailEcommerceApparelChildrenShopifyAgent

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 10.7/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 3.9 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

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/primary: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

MCP Servers 1

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

Scopes 1

OAuth scopes governing access to this provider's APIs.

Primary Scopes

4 scopes · authorizationCode

4 scopes

SCOPES

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: primary
name: Primary
description: 'Primary (Primary Kids, Inc.) is a direct-to-consumer children''s apparel brand selling simple, slogan-free,
  mix-and-match clothing "in all colors, for all kids" — babies through age 14, plus adult sizes, swimwear, school uniforms
  and licensed Sesame Street collaborations. The company operates a Shopify-hosted online store at primary.com and is a portfolio
  company of Homebrew. Primary has no first-party developer API, but its storefront is agent-accessible: it serves a live
  hosted Shopify Storefront MCP server (catalog search, product lookup, cart, checkout, policy/FAQ lookup) and exposes Shopify''s
  Customer Account API (OAuth2/OIDC) for customer-scoped operations, along with a published llms.txt agent-instructions document.'
url: https://raw.githubusercontent.com/api-evangelist/primary/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- homebrew
x-tier: stub
x-tier-reason: portfolio-lead
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Consumer
- Retail
- Ecommerce
- Apparel
- Children
- Shopify
- Agent
image: https://www.primary.com/favicon.ico
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.primary.com
- type: MCPServer
  name: Primary Shopify Storefront MCP
  url: mcp/primary-mcp.yml
- type: LLMsTxt
  url: llms/primary-llms.txt
- type: WellKnown
  url: well-known/primary-well-known.yml
- type: Authentication
  url: authentication/primary-authentication.yml
- type: OAuthScopes
  url: scopes/primary-scopes.yml
- type: Conformance
  url: conformance/primary-conformance.yml
- type: DomainSecurity
  url: security/primary-domain-security.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 9
  pass: local-v1