Curie

Curie (Curie Vision, Inc.) is the commerce layer for AI — it connects AI assistants like ChatGPT, Claude, and Gemini to real product catalogs from 5.6M+ Shopify stores via the Model Context Protocol (MCP). Results carry live prices, real inventory, affiliate purchase links, and interactive 3D digital twins (GLB/USDZ) that shoppers can rotate and view in AR. Curie publishes a public REST catalog API, a hosted MCP server exposing 30 commerce tools, and cross-protocol discovery profiles (MCP, UCP, A2A, OpenAI Apps SDK). Most discovery and tool calls run on a free public tier with no auth; a Pro Bearer is required only for premium tools such as checkout. Backed by 500 Global.

Curie publishes 2 API contracts indexed on the APIs.io network: Catalog API and Products API. Tagged areas include Company, Commerce, E-Commerce, Shopify, and Artificial Intelligence.

The Curie catalog on APIs.io includes 1 Spectral governance ruleset.

Curie’s developer surface includes engineering blog, documentation, pricing, authentication, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.1/100 developing ▬ flat Agent 49/100 agent ready Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

1 published contract 1 MCP Servers 2 Agent Skills

Company Commerce E-Commerce Shopify Artificial Intelligence MCP Agentic Commerce Product Discovery 3D

Kin Score

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

Composite quality — 43.1/100 · developing

Contract Quality 12.3 / 21

Developer Ergonomics 7.2 / 17

Access Clarity 5.4 / 17

Operational Transparency 0.0 / 11

Contract Governance 3.2 / 10

Discoverability 6.4 / 9

Regulatory Posture 4.8 / 15

Agent readiness — 49/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 4 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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

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Agent readiness — checks not met, largest first (exact, from this profile):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

2 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 31.6 — up to +13.7 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Developer Ergonomics scores 42.3 — up to +11.5 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/curie/apis.yml: open an issue on github.com/api-evangelist/curie 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 →

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 (verified)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 2

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

Curie Catalog API

The Catalog API from Curie — 1 operation(s) for catalog.

Curie Products API

The Products API from Curie — 6 operation(s) for products.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Curie 3D Product Commerce Catalog API

OPEN COLLECTION

Curie 3D Product Commerce Catalog Products API

OPEN COLLECTION

MCP Servers 1

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

Curie Commerce

AI commerce layer for Shopify — search, compare, view 3D models, and buy products from 5.6M+ stores. Free public tier (matches Shopify Storefront MCP behaviour); Pro Bearer requ...

MCP SERVER

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Shop and check out via the Curie MCP server

AGENT SKILL

Discover Curie products and 3D models

AGENT SKILL

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Curie API Rules

60 rules · 58 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Curie Overlay

3 actions · update · curie-openapi.json

DERIVED

Security Posture 2

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

Curie Authentication

none/http-bearer/oauth2 · 1 scheme

SECURITY

Curie Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Curie Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

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

ErrorCatalog

Conventions

DataModel

Conformance

Lifecycle

Components

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: curie
name: Curie
description: Curie (Curie Vision, Inc.) is the commerce layer for AI — it connects AI assistants like ChatGPT, Claude, and
  Gemini to real product catalogs from 5.6M+ Shopify stores via the Model Context Protocol (MCP). Results carry live prices,
  real inventory, affiliate purchase links, and interactive 3D digital twins (GLB/USDZ) that shoppers can rotate and view
  in AR. Curie publishes a public REST catalog API, a hosted MCP server exposing 30 commerce tools, and cross-protocol discovery
  profiles (MCP, UCP, A2A, OpenAI Apps SDK). Most discovery and tool calls run on a free public tier with no auth; a Pro Bearer
  is required only for premium tools such as checkout. Backed by 500 Global.
url: https://raw.githubusercontent.com/api-evangelist/curie/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - 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://cdn.prod.website-files.com/631a7e6c04b8fc3228d60317/631a7e6c04b8fc759ad60333_App%20Icon%20Main%20-%2032x32.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: enriched
x-tier-reason: live-api-and-mcp
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Commerce
- E-Commerce
- Shopify
- Artificial Intelligence
- MCP
- Agentic Commerce
- Product Discovery
- 3D
tags_raw:
- Company
- Commerce
- E-Commerce
- Shopify
- Artificial Intelligence
- Model Context Protocol
- Agentic Commerce
- Product Discovery
- 3D
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: curie:curie-catalog-api
  name: Curie Catalog API
  description: The Catalog API from Curie — 1 operation(s) for catalog.
  humanURL: https://chat.curie.app
  baseURL: https://chat.curie.app
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/curie-catalog-api-openapi.yml
  - type: APIReference
    url: openapi/_original/curie-openapi.json
- aid: curie:curie-products-api
  name: Curie Products API
  description: The Products API from Curie — 6 operation(s) for products.
  humanURL: https://chat.curie.app
  baseURL: https://chat.curie.app
  tags:
  - Product
  tags_raw:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/curie-products-api-openapi.yml
  - type: APIReference
    url: openapi/_original/curie-openapi.json
common:
- url: https://curie.co/blog/
  type: Blog
- type: Website
  url: https://curie.co
- type: DeveloperPortal
  url: https://chat.curie.app
- type: Documentation
  url: https://chat.curie.app/llms.txt
- type: Pricing
  url: https://chat.curie.app/pricing
- type: TermsOfService
  url: https://chat.curie.app/terms
- type: PrivacyPolicy
  url: https://chat.curie.app/privacy
- type: MCPServer
  url: mcp/curie-mcp.yml
- type: LLMsTxt
  url: llms/curie-llms.txt
- type: WellKnown
  url: well-known/curie-well-known.yml
- type: Authentication
  url: authentication/curie-authentication.yml
- type: OAuthScopes
  url: scopes/curie-scopes.yml
- type: DomainSecurity
  url: security/curie-domain-security.yml
- type: ErrorCatalog
  url: errors/curie-problem-types.yml
- type: Conventions
  url: conventions/curie-conventions.yml
- type: DataModel
  url: data-model/curie-data-model.yml
- type: Conformance
  url: conformance/curie-conformance.yml
- type: Lifecycle
  url: lifecycle/curie-lifecycle.yml
- type: Overlay
  url: overlays/curie-overlay.yaml
- type: Components
  url: components/curie-components.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Curie API — frequently asked questions

Does Curie have an API?

Yes. APIs.io lists 2 APIs from Curie, including Curie Catalog API and Curie Products API.

Is there an OpenAPI specification for the Curie API?

Yes. APIs.io indexes 2 OpenAPI specifications for Curie, each linked for download from this page.

How do I authenticate with the Curie API?

Curie documents its authentication (none/http-bearer/oauth2 · 1 scheme). The details are profiled on APIs.io as Curie Authentication.

Does Curie have an MCP server?

Yes. APIs.io lists 1 MCP server for Curie: AI commerce layer for Shopify — search, compare, view 3D models, and buy products from 5.6M+ stores. Free public tier (matches Shopify Storefront MCP behaviour); Pro Bearer required only for premium t

Is the Curie API ready for AI agents?

Curie has a Kin Score of 43.1 out of 100 (developing) and an Agent Readiness score of 49.4 (agent-ready), scored by API Evangelist on 2026-11-06.

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