# UNTUCKit

**Canonical:** https://apis.io/providers/untuckit/  
**Website:** https://untuckit.com  
**APIs profiled:** 2

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.

## Kin Score — 23.6 / 100 (emerging)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 23.6).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 0.0 |
| Governance | 12.5 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 32.6 |
| Commercial Clarity | 34.2 |

## Agent readiness — 24.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (2)

- **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)

- **untuckit-mcp.yml**

## Security (2)

- **Untuckit Authentication** — 3 schemes
- **Untuckit Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Apparel, Retail, eCommerce, Shopify, Agentic Commerce, MCP, UCP

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/untuckit/). Scores are computed from the provider's own public artifacts under a published rubric.