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, Ecommerce, 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
23.8/100 emerging ▬ flat Agent 16/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0
1 APIs 1 MCP Servers
CompanyBeveragesConsumer Packaged GoodsEcommerceDirect to ConsumerRetailAgentic CommerceModel Context ProtocolUniversal Commerce ProtocolShopify

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0
Composite quality — 23.8/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 6.1 / 20
Access Clarity 6.8 / 20
Operational Transparency 0.0 / 13
Contract Governance 2.2 / 12
Discoverability 8.7 / 10
Agent readiness — 16/100 · 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 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Surface 5 / 5
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/hint: 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 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

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

OAuth 2.0 · no documented scopes

0 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
MCPServer
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Idempotency
Idempotency
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 Lifecycle
Lifecycle
 DataModel
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)

apis.yml Raw ↑ 
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.'
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
- 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
  - 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
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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