UNTUCKit

UNTUCKit is a US apparel brand and omnichannel retailer best known for shirts designed to be worn untucked, selling menswear and womenswear through untuckit.com and its retail stores. Its Shopify-powered storefront is notably agent-ready: the store publishes agents.md and llms.txt operating instructions, a Universal Commerce Protocol (UCP) merchant profile at /.well-known/ucp, a live MCP endpoint at /api/ucp/mcp for catalog search, cart, and buyer-approved checkout, OIDC/OAuth discovery for the Shopify Customer Account API, and unauthenticated product and collection JSON.

UNTUCKit publishes 2 APIs on the APIs.io network. Tagged areas include Company, Apparel, Retail, eCommerce, and Shopify.

UNTUCKit’s developer surface includes authentication, support, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
22.6/100 emerging ▬ flat Agent 30/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
2 APIs 1 MCP Servers
CompanyApparelRetaileCommerceShopifyAgentic CommerceMCPUCP

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 22.6/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 6.5 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 30/100 · 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 5 / 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/untuckit: 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.

UNTUCKit Storefront Agent Commerce (UCP/MCP) API

Live MCP endpoint implementing the Universal Commerce Protocol shopping service for the UNTUCKit store: catalog search, cart, checkout, fulfillment, discounts, and orders, with ...

UNTUCKit Storefront Catalog JSON API

Unauthenticated read-only Shopify storefront JSON documented in the store's agents.md: product JSON at /products/{handle}.json, collection product listings at /collections/{hand...

MCP Servers 1

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

untuckit-mcp.yml

MCP SERVER

Security Posture 2

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

Untuckit Authentication

3 schemes

SECURITY

Untuckit Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Untuckit Scopes

4 scopes

4 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgentSkill
AgentSkill

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 Conventions
Conventions
 Lifecycle
Lifecycle

Access & Security 3

Authentication, authorization, and security posture

OAuthScopes
OAuthScopes
 Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: untuckit
name: UNTUCKit
description: 'UNTUCKit is a US apparel brand and omnichannel retailer best known for shirts designed to be worn untucked,
  selling menswear and womenswear through untuckit.com and its retail stores. Its Shopify-powered storefront is notably agent-ready:
  the store publishes agents.md and llms.txt operating instructions, a Universal Commerce Protocol (UCP) merchant profile
  at /.well-known/ucp, a live MCP endpoint at /api/ucp/mcp for catalog search, cart, and buyer-approved checkout, OIDC/OAuth
  discovery for the Shopify Customer Account API, and unauthenticated product and collection JSON.'
url: https://raw.githubusercontent.com/api-evangelist/untuckit/refs/heads/main/apis.yml
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://avatars.githubusercontent.com/u/48734252?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- bond-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Apparel
- Retail
- eCommerce
- Shopify
- Agentic Commerce
- MCP
- UCP
apis:
- name: UNTUCKit Storefront Agent Commerce (UCP/MCP) API
  description: 'Live MCP endpoint implementing the Universal Commerce Protocol shopping service for the UNTUCKit store: catalog
    search, cart, checkout, fulfillment, discounts, and orders, with Shop Pay / Google Pay / card payment handlers and a hard
    buyer-approval rule on payment. Discovered via /.well-known/ucp; schema published as OpenRPC at ucp.dev.'
  humanURL: https://www.untuckit.com/agents.md
  baseURL: https://www.untuckit.com/api/ucp/mcp
  tags:
  - Agentic Commerce
  - MCP
  - UCP
  - Checkout
  properties:
  - type: Documentation
    url: https://www.untuckit.com/agents.md
- name: UNTUCKit Storefront Catalog JSON API
  description: 'Unauthenticated read-only Shopify storefront JSON documented in the store''s agents.md: product JSON at /products/{handle}.json,
    collection product listings at /collections/{handle}/products.json, product search at /search?q={query}&type=product,
    and sitemap.xml for store metadata.'
  humanURL: https://www.untuckit.com/agents.md
  baseURL: https://www.untuckit.com
  tags:
  - Products
  - Catalog
  - eCommerce
  properties:
  - type: Documentation
    url: https://www.untuckit.com/agents.md
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://untuckit.com
- type: MCPServer
  url: mcp/untuckit-mcp.yml
- type: LLMsTxt
  url: llms/untuckit-llms.txt
- type: WellKnown
  url: well-known/untuckit-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: OAuthScopes
  url: scopes/untuckit-scopes.yml
- type: Authentication
  url: authentication/untuckit-authentication.yml
- type: Conformance
  url: conformance/untuckit-conformance.yml
- type: Conventions
  url: conventions/untuckit-conventions.yml
- type: Lifecycle
  url: lifecycle/untuckit-lifecycle.yml
- type: DomainSecurity
  url: security/untuckit-domain-security.yml
- type: PrivacyPolicy
  url: https://www.untuckit.com/policies/privacy-policy
- type: TermsOfService
  url: https://www.untuckit.com/policies/terms-of-service
- type: Support
  url: https://www.untuckit.com/pages/contact-us
- type: Blog
  url: https://www.untuckit.com/blogs/news
- type: Login
  url: https://www.untuckit.com/account/login
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 14
  pass: local-v1