Hint

Hint Inc. is a San Francisco based beverage company founded in 2005 by Kara Goldin, known for fruit-infused unsweetened water sold in still, sparkling, caffeinated and kids formats across 25+ flavors. A large share of its business is direct-to-consumer through its own storefront at drinkhint.com, which runs on Shopify. Hint publishes no traditional developer program, SDKs or OpenAPI, but the storefront does expose a live, anonymous agent surface: an agents.md / llms.txt agent instruction document, a Universal Commerce Protocol (UCP) merchant profile at /.well-known/ucp, and a Model Context Protocol endpoint at /api/ucp/mcp that answers tools/list with 13 real catalog, cart, checkout and order tools. Checkout explicitly requires contemporaneous human approval before payment.

Hint publishes 1 API on the APIs.io network. Tagged areas include Company, Beverages, Consumer Packaged Goods, E-Commerce, and Direct to Consumer.

Hint’s developer surface includes documentation, support, engineering blog, signup flow, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

25.4/100 emerging ▬ flat Agent 25/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

1 API 1 MCP Servers

Company Beverages Consumer Packaged Goods E-Commerce Direct to Consumer Retail Agentic Commerce MCP Universal Commerce Protocol Shopify

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 25.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.2 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 25/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 5 / 5

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/.

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 github.com/api-evangelist/hint: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Hint Agentic Commerce (UCP / MCP)

The agent-facing commerce surface of the drinkhint.com storefront. Discovery is published at https://www.drinkhint.com/.well-known/ucp (Universal Commerce Protocol merchant prof...

MCP Servers 1

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

Hint Storefront Agentic Commerce MCP

drinkhint.com serves a live Model Context Protocol endpoint for agent-driven commerce against Hint's own product catalog. It is reachable anonymously — an unauthenticated POST o...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Hint Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Hint Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Hint Authentication

2 schemes

SECURITY

Hint Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Hint Scopes

4 scopes · authorization_code

4 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

WellKnown

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Conformance

Lifecycle

DataModel

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: hint
name: Hint
description: 'Hint Inc. is a San Francisco based beverage company founded in 2005 by Kara Goldin, known for fruit-infused
  unsweetened water sold in still, sparkling, caffeinated and kids formats across 25+ flavors. A large share of its business
  is direct-to-consumer through its own storefront at drinkhint.com, which runs on Shopify. Hint publishes no traditional
  developer program, SDKs or OpenAPI, but the storefront does expose a live, anonymous agent surface: an agents.md / llms.txt
  agent instruction document, a Universal Commerce Protocol (UCP) merchant profile at /.well-known/ucp, and a Model Context
  Protocol endpoint at /api/ucp/mcp that answers tools/list with 13 real catalog, cart, checkout and order tools. Checkout
  explicitly requires contemporaneous human approval before payment.'
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
  - scopes
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://www.drinkhint.com/cdn/shop/files/Logo_Hint-Wordmark-Droplet-Secondary-2_Color.png?v=1762813167
url: https://raw.githubusercontent.com/api-evangelist/hint/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: agentic-commerce-surface
specificationVersion: '0.20'
created: '2026-08-22'
modified: '2026-08-22'
tags:
- Company
- Beverages
- Consumer Packaged Goods
- E-Commerce
- Direct to Consumer
- Retail
- Agentic Commerce
- MCP
- Universal Commerce Protocol
- Shopify
tags_raw:
- Company
- Beverages
- Consumer Packaged Goods
- Ecommerce
- Direct to Consumer
- Retail
- Agentic Commerce
- Model Context Protocol
- Universal Commerce Protocol
- Shopify
apis:
- name: Hint Agentic Commerce (UCP / MCP)
  description: The agent-facing commerce surface of the drinkhint.com storefront. Discovery is published at https://www.drinkhint.com/.well-known/ucp
    (Universal Commerce Protocol merchant profile, versions 2026-04-08 and 2026-01-23) and the callable surface is a Model
    Context Protocol endpoint at https://www.drinkhint.com/api/ucp/mcp. An anonymous tools/list returns 13 tools covering
    catalog search and lookup, product detail, cart create/update/cancel, checkout create/update/complete/cancel and order
    retrieval. The surface is provided natively by the Shopify platform for this merchant's own catalog and is served from
    Hint's own hosts.
  humanURL: https://www.drinkhint.com/agents.md
  baseURL: https://www.drinkhint.com/api/ucp/mcp
  tags:
  - Agentic Commerce
  - MCP
  - Universal Commerce Protocol
  - E-Commerce
  tags_raw:
  - Agentic Commerce
  - Model Context Protocol
  - Universal Commerce Protocol
  - Ecommerce
  properties:
  - type: MCPServer
    url: mcp/hint-mcp.yml
  - type: LLMsTxt
    url: llms/hint-llms.txt
  - type: DataModel
    url: data-model/hint-data-model.yml
  - type: ErrorCatalog
    url: errors/hint-problem-types.yml
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: ucp
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/hint-domain-security.yml
- type: Website
  url: https://www.drinkhint.com/
- type: Documentation
  url: https://www.drinkhint.com/agents.md
- type: Support
  url: https://www.drinkhint.com/pages/contact-us
- type: Blog
  url: https://www.drinkhint.com/blogs/news
- type: SignUp
  url: https://www.drinkhint.com/account/login
- type: TermsOfService
  url: https://www.drinkhint.com/policies/terms-of-service
- type: PrivacyPolicy
  url: https://www.drinkhint.com/policies/privacy-policy
- type: MCPServer
  url: mcp/hint-mcp.yml
- type: LLMsTxt
  url: llms/hint-llms.txt
- type: WellKnown
  url: well-known/hint-well-known.yml
- type: Authentication
  url: authentication/hint-authentication.yml
- type: OAuthScopes
  url: scopes/hint-scopes.yml
- type: Conventions
  url: conventions/hint-conventions.yml
- type: Idempotency
  url: conventions/hint-conventions.yml
- type: ErrorCatalog
  url: errors/hint-problem-types.yml
- type: Conformance
  url: conformance/hint-conformance.yml
- type: Lifecycle
  url: lifecycle/hint-lifecycle.yml
- type: RateLimits
  url: rate-limits/hint-rate-limits.yml
- type: Plans
  url: plans/hint-plans-pricing.yml
- type: DataModel
  url: data-model/hint-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-22'
  status: enriched
  artifacts_added: 22
  pass: local-v1

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