Ubras

Ubras is a Chinese direct-to-consumer intimate apparel brand best known for popularizing sizeless (one-size) wireless bras and skin-layer basics. It sells through its Chinese official site at www.ubras.cn and an international Shopify storefront at ubras.com. The international store publishes a genuinely agent-ready commerce surface: a Universal Commerce Protocol (UCP) merchant profile at /.well-known/ucp, live MCP endpoints for catalog search, cart, and buyer-approved checkout, llms.txt and agents.md agent instructions, and Shopify customer-accounts OIDC discovery. Ubras is a portfolio company of Hongshan (Sequoia Capital China).

Ubras is listed with 1 API on the APIs.io network. Tagged areas include Company, Consumer, Retail, E-Commerce, and Apparel.

Ubras’ developer surface includes documentation, support, engineering blog, authentication, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.3/100 emerging ▬ flat Agent 14/100 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 →

1 API 1 MCP Servers

Company Consumer Retail E-Commerce ApparelIntimate ApparelDirect to Consumer Agentic Commerce

Kin Score

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

Composite quality — 22.3/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.9 / 17

Access Clarity 4.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 14/100 · 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 0 / 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/.

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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)

9 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
Developer Ergonomics scores 28.6 — up to +14.3 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/ubras/apis.yml: open an issue on github.com/api-evangelist/ubras 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 2

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)

APIs 1

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

Ubras Storefront Agent Commerce (UCP + MCP)

Agent-facing commerce surface of the ubras.com Shopify storefront: a live storefront MCP endpoint (catalog search, cart, product details, policy FAQs), a Universal Commerce Prot...

MCP Servers 1

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

Ubras MCP Server

Ubras's international Shopify storefront (ubras.com) exposes two live, provider-published MCP surfaces. (1) The Shopify storefront MCP at https://ubras.com/api/mcp answers JSON-...

MCP SERVER

Security Posture 2

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

Ubras Authentication

openIdConnect · 1 scheme

SECURITY

Ubras Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

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 3

The organization behind the API

Website

Website

Website

Website

Blog

Blog

Source (apis.yml)

aid: ubras
name: Ubras
description: 'Ubras is a Chinese direct-to-consumer intimate apparel brand best known for popularizing sizeless (one-size)
  wireless bras and skin-layer basics. It sells through its Chinese official site at www.ubras.cn and an international Shopify
  storefront at ubras.com. The international store publishes a genuinely agent-ready commerce surface: a Universal Commerce
  Protocol (UCP) merchant profile at /.well-known/ucp, live MCP endpoints for catalog search, cart, and buyer-approved checkout,
  llms.txt and agents.md agent instructions, and Shopify customer-accounts OIDC discovery. Ubras is a portfolio company of
  Hongshan (Sequoia Capital China).'
url: https://raw.githubusercontent.com/api-evangelist/ubras/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: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://ubras.com/cdn/shop/files/20220928-174018.jpg?v=1664358034
x-type: company
x-source: vc-portfolio
x-backed-by:
- hongshan
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Consumer
- Retail
- E-Commerce
- Apparel
- Intimate Apparel
- Direct to Consumer
- Agentic Commerce
tags_raw:
- Company
- Consumer
- Retail
- eCommerce
- Apparel
- Intimate Apparel
- Direct-to-Consumer
- Agentic Commerce
apis:
- name: Ubras Storefront Agent Commerce (UCP + MCP)
  description: 'Agent-facing commerce surface of the ubras.com Shopify storefront: a live storefront MCP endpoint (catalog
    search, cart, product details, policy FAQs), a Universal Commerce Protocol shopping service with buyer-approved checkout,
    and anonymous read-only product/collection JSON endpoints.'
  humanURL: https://ubras.com/agents.md
  baseURL: https://ubras.com/api/mcp
  tags:
  - Commerce
  - MCP
  - Universal Commerce Protocol
  - Agents
  - Product
  tags_raw:
  - Commerce
  - MCP
  - UCP
  - Agents
  - Products
  properties:
  - type: Documentation
    url: https://ubras.com/agents.md
  - type: MCPServer
    url: mcp/ubras-mcp.yml
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: storefront-mcp
common:
- type: DomainSecurity
  url: security/ubras-domain-security.yml
- type: Website
  url: https://ubras.com
- type: Website
  url: https://www.ubras.cn
- type: Documentation
  url: https://ubras.com/agents.md
- type: Login
  url: https://ubras.com/account/login
- type: Support
  url: https://ubras.com/pages/contact-us
- type: Blog
  url: https://ubras.com/blogs/news
- type: PrivacyPolicy
  url: https://ubras.com/policies/privacy-policy
- type: TermsOfService
  url: https://ubras.com/policies/terms-of-service
- type: LLMsTxt
  url: llms/ubras-llms.txt
- type: MCPServer
  url: mcp/ubras-mcp.yml
- type: WellKnown
  url: well-known/ubras-well-known.yml
- type: Authentication
  url: authentication/ubras-authentication.yml
- type: Conformance
  url: conformance/ubras-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 10
  pass: local-v1

Ubras API — frequently asked questions

Does Ubras have an API?

Yes. APIs.io lists 1 API from Ubras, including Ubras Storefront Agent Commerce (UCP + MCP).

How do I authenticate with the Ubras API?

Ubras documents its authentication (openIdConnect · 1 scheme). The details are profiled on APIs.io as Ubras Authentication.

Does Ubras have an MCP server?

Yes. APIs.io lists 1 MCP server for Ubras: Ubras's international Shopify storefront (ubras.com) exposes two live, provider-published MCP surfaces. (1) The Shopify storefront MCP at https://ubras.com/api/mcp answers JSON-RPC tools/list unauthen

Is the Ubras API ready for AI agents?

Ubras has a Kin Score of 22.3 out of 100 (emerging) and an Agent Readiness score of 13.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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