JOLYN

JOLYN is an athletic swimwear and apparel brand for competitive and team swimming, water polo, and aquatics, known for durable, functional practice and racing suits, team uniforms, and active lifestyle apparel. Surfaced as a portfolio company of Norwest Venture Partners and added to the API Evangelist network, JOLYN publishes no first-party developer API — its direct-to-consumer storefront at jolyn.com (jolynclothing.com redirects here) is Shopify-hosted. That platform exposes a genuine agent-native commerce surface: a published /llms.txt with agent instructions, OpenID Connect discovery for the Shopify Customer Account API, and a live Universal Commerce Protocol (UCP) MCP endpoint for buyer-approved, agent-driven shopping and checkout.

JOLYN publishes 1 API on the APIs.io network. Tagged areas include Company, Retail, E-Commerce, Apparel, and Swimwear.

JOLYN’s developer surface includes authentication and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

17.4/100 emerging ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs 1 MCP Servers

CompanyRetailE-CommerceApparelSwimwearDirect-to-ConsumerShopifyAgentic Commerce

Kin Score

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

Composite quality — 17.4/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 3.9 / 20

Commercial Clarity 4.2 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 9.3 / 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/jolynclothing: 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 1

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

JOLYN UCP Agent Commerce (Shopify)

Shopify-served Universal Commerce Protocol MCP endpoint for the JOLYN store, enabling buyer-approved agent-driven catalog search, cart, and checkout. Advertised in /.well-known/...

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.

Jolynclothing Scopes

4 scopes · authorizationCode

4 scopes

SCOPES

Resources

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

MCPServer

MCPServer

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: jolynclothing
name: JOLYN
description: 'JOLYN is an athletic swimwear and apparel brand for competitive and team swimming, water polo, and aquatics,
  known for durable, functional practice and racing suits, team uniforms, and active lifestyle apparel. Surfaced as a portfolio
  company of Norwest Venture Partners and added to the API Evangelist network, JOLYN publishes no first-party developer API
  — its direct-to-consumer storefront at jolyn.com (jolynclothing.com redirects here) is Shopify-hosted. That platform exposes
  a genuine agent-native commerce surface: a published /llms.txt with agent instructions, OpenID Connect discovery for the
  Shopify Customer Account API, and a live Universal Commerce Protocol (UCP) MCP endpoint for buyer-approved, agent-driven
  shopping and checkout.'
url: https://raw.githubusercontent.com/api-evangelist/jolynclothing/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
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: '2026-07-19'
tags:
- Company
- Retail
- E-Commerce
- Apparel
- Swimwear
- Direct-to-Consumer
- Shopify
- Agentic Commerce
image: https://cdn.shopify.com/s/files/1/0703/0099/files/JOLYN-LOGO-Black.png?height=628&pad_color=ffffff&v=1708450946&width=1200
apis:
- name: JOLYN UCP Agent Commerce (Shopify)
  description: Shopify-served Universal Commerce Protocol MCP endpoint for the JOLYN store, enabling buyer-approved agent-driven
    catalog search, cart, and checkout. Advertised in /.well-known/ucp and documented in /llms.txt.
  humanURL: https://jolyn.com/llms.txt
  baseURL: https://jolyn.com/api/ucp/mcp
  properties:
  - type: MCPServer
    url: mcp/jolynclothing-mcp.yml
  - type: LLMsTxt
    url: llms/jolynclothing-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/jolynclothing-domain-security.yml
- type: Website
  url: https://jolyn.com
- type: LLMsTxt
  url: llms/jolynclothing-llms.txt
- type: WellKnown
  url: well-known/jolynclothing-well-known.yml
- type: MCPServer
  url: mcp/jolynclothing-mcp.yml
- type: Authentication
  url: authentication/jolynclothing-authentication.yml
- type: OAuthScopes
  url: scopes/jolynclothing-scopes.yml
- type: Conventions
  url: conventions/jolynclothing-conventions.yml
- type: TermsOfService
  url: https://jolyn.com/policies/terms-of-service
- type: PrivacyPolicy
  url: https://jolyn.com/policies/privacy-policy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence