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 is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Apparel, Retail, E-Commerce, and Shopify.

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

🌐 Visit website 📡 Profile data on GitHub

24.4/100 emerging ▬ flat Agent 17/100 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 →

AccessSelf serve

2 APIs 1 MCP Servers

Company Apparel Retail E-Commerce Shopify Agentic Commerce MCP Universal Commerce Protocol

Kin Score

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

Composite quality — 24.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 4.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 5.7 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 17/100 · 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/untuckit/"><img src="https://apis.io/badge/untuckit/card.svg" alt="UNTUCKit on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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
Access Clarity scores 27.6 — up to +14.5 composite points
Operational Transparency scores 0.0 — up to +13.0 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/untuckit/apis.yml: open an issue on github.com/api-evangelist/untuckit 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
Fashion & Apparel (apparel, footwear, textiles)	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 3

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)

Agent Skills

measured — observed by APIs.io (published)

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 Server

UNTUCKit's Shopify storefront operates a live, first-party-hosted MCP endpoint as the transport for the Universal Commerce Protocol (UCP) shopping service. The endpoint, its Ope...

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

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

WellKnown

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)

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
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
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  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: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Apparel
- Retail
- E-Commerce
- Shopify
- Agentic Commerce
- MCP
- Universal Commerce Protocol
tags_raw:
- 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
  - Universal Commerce Protocol
  - Checkout
  tags_raw:
  - Agentic Commerce
  - MCP
  - UCP
  - Checkout
  properties:
  - type: Documentation
    url: https://www.untuckit.com/agents.md
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: ucp
- 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
  tags:
  - Product
  - Catalog
  - E-Commerce
  tags_raw:
  - Products
  - Catalog
  - eCommerce
  properties:
  - type: Documentation
    url: https://www.untuckit.com/agents.md
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: storefront-json
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

UNTUCKit API — frequently asked questions

Does UNTUCKit have an API?

Yes. APIs.io lists 2 APIs from UNTUCKit, including UNTUCKit Storefront Agent Commerce (UCP/MCP) API and UNTUCKit Storefront Catalog JSON API.

How do I authenticate with the UNTUCKit API?

UNTUCKit documents its authentication (3 schemes). The details are profiled on APIs.io as Untuckit Authentication.

Does UNTUCKit have an MCP server?

Yes. APIs.io lists 1 MCP server for UNTUCKit: UNTUCKit's Shopify storefront operates a live, first-party-hosted MCP endpoint as the transport for the Universal Commerce Protocol (UCP) shopping service. The endpoint, its OpenRPC schema, and the ag

Is the UNTUCKit API ready for AI agents?

UNTUCKit has a Kin Score of 24.4 out of 100 (emerging) and an Agent Readiness score of 17.4 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/untuckit"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/untuckit/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/untuckit/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.