ModRetro

ModRetro Inc. designs and sells modern recreations of classic game consoles — the Chromatic, an FPGA-based Game Boy-compatible handheld, and the M64, a Nintendo 64-style console — along with physical cartridges, controllers and accessories. It is a consumer hardware company, not a software vendor, and it publishes no developer portal, no OpenAPI and no SDKs. It does, however, run a live agent-facing commerce API: its Shopify storefront at modretro.com serves a Universal Commerce Protocol (UCP 2026-04-08) merchant profile at /.well-known/ucp and a remote Model Context Protocol server at /api/ucp/mcp exposing 13 catalog, cart, checkout and order tools, advertised from its own robots.txt, /agents.md and /llms.txt, with idempotency required on checkout completion and an explicit human-approval rule on payment. Separately, ModRetro publishes the Chromatic's FPGA and MCU design files on GitHub under GPL-3.0 with a dated firmware changelog.

ModRetro is listed with 1 API on the APIs.io network. Tagged areas include Company, Consumer Electronics, Gaming, Retro Gaming, and Hardware.

ModRetro’s developer surface includes documentation, authentication, changelog, support, engineering blog, pricing, signup flow, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.1/100 thin ▬ flat Agent 23/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

AccessSelf serve

1 API 1 MCP Servers 3 Agent Skills

Company Consumer Electronics GamingRetro GamingHardware E-Commerce Agentic Commerce MCP Universal Commerce Protocol Open Source Hardware

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 32.1/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 5.2 / 17

Access Clarity 7.6 / 17

Operational Transparency 4.7 / 11

Contract Governance 1.9 / 10

Discoverability 5.5 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 23/100 · 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 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 5 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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

5 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
Developer Ergonomics scores 30.4 — up to +13.9 composite points
Access Clarity scores 44.7 — up to +11.1 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/modretro/apis.yml: open an issue on github.com/api-evangelist/modretro 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 1

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.

Universal Commerce Protocol (UCP)

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

ModRetro Agent Commerce API (UCP over MCP)

ModRetro's agent-facing commerce API. A remote Model Context Protocol server implementing the Universal Commerce Protocol shopping service (versions 2026-04-08 and 2026-01-23), ...

MCP Servers 1

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

ModRetro MCP Server

Remote MCP server at modretro.com over HTTP requiring OAuth; 13 tools listed.

MCP SERVER

Agent Skills 3

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

Buy a ModRetro console on a buyer's behalf

AGENT SKILL

Look up ModRetro products, prices and availability

AGENT SKILL

Check a ModRetro order and explain what can still be changed

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Modretro Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Modretro Rate Limits

2 limits

RATE LIMITS

Security Posture 2

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

Modretro Authentication

openIdConnect/oauth2/http · 3 schemes

SECURITY

Modretro Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Modretro Scopes

4 scopes · authorizationCode

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

LLMsTxt

MCPServer

WellKnown

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Conformance

DataModel

Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 5

Status, limits, changes, and where to get help

RateLimits

ChangeLog

Support

HelpCenter

Community

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

Source (apis.yml)

aid: modretro
name: ModRetro
description: 'ModRetro Inc. designs and sells modern recreations of classic game consoles — the Chromatic, an FPGA-based Game
  Boy-compatible handheld, and the M64, a Nintendo 64-style console — along with physical cartridges, controllers and accessories.
  It is a consumer hardware company, not a software vendor, and it publishes no developer portal, no OpenAPI and no SDKs.
  It does, however, run a live agent-facing commerce API: its Shopify storefront at modretro.com serves a Universal Commerce
  Protocol (UCP 2026-04-08) merchant profile at /.well-known/ucp and a remote Model Context Protocol server at /api/ucp/mcp
  exposing 13 catalog, cart, checkout and order tools, advertised from its own robots.txt, /agents.md and /llms.txt, with
  idempotency required on checkout completion and an explicit human-approval rule on payment. Separately, ModRetro publishes
  the Chromatic''s FPGA and MCU design files on GitHub under GPL-3.0 with a dated firmware changelog.'
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: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - scopes
  - rate-limits
  - security
  generated: '2026-09-02'
  method: derived
image: https://modretro.com/cdn/shop/files/MR_SocialShare_ModRetro.png?v=1780328409&width=1200
url: https://raw.githubusercontent.com/api-evangelist/modretro/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-26'
modified: '2026-08-26'
tags:
- Company
- Consumer Electronics
- Gaming
- Retro Gaming
- Hardware
- E-Commerce
- Agentic Commerce
- MCP
- Universal Commerce Protocol
- Open Source Hardware
tags_raw:
- Company
- Consumer Electronics
- Gaming
- Retro Gaming
- Hardware
- E-Commerce
- Agentic Commerce
- Model Context Protocol
- Universal Commerce Protocol
- Open Source Hardware
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: ModRetro Agent Commerce API (UCP over MCP)
  description: ModRetro's agent-facing commerce API. A remote Model Context Protocol server implementing the Universal Commerce
    Protocol shopping service (versions 2026-04-08 and 2026-01-23), exposing 13 tools across catalog search and lookup, cart,
    checkout and order. initialize and tools/list answer anonymously; every tools/call requires a fetchable UCP agent-profile
    URI, and the order and checkout tools additionally require a Shopify agent JWT. complete_checkout requires an idempotency
    key and, per ModRetro's own robots.txt and /agents.md, explicit contemporaneous human approval of payment.
  humanURL: https://modretro.com/agents.md
  baseURL: https://modretro.com/api/ucp/mcp
  tags:
  - Agentic Commerce
  - MCP
  - Universal Commerce Protocol
  - E-Commerce
  - Catalog
  - Checkout
  tags_raw:
  - Agentic Commerce
  - Model Context Protocol
  - Universal Commerce Protocol
  - E-Commerce
  - Catalog
  - Checkout
  properties:
  - type: MCPServer
    url: mcp/modretro-mcp.yml
  - type: Documentation
    url: https://modretro.com/agents.md
  - type: Authentication
    url: authentication/modretro-authentication.yml
  - type: OAuthScopes
    url: scopes/modretro-scopes.yml
  - type: RateLimits
    url: rate-limits/modretro-rate-limits.yml
  - type: ErrorCatalog
    url: errors/modretro-problem-types.yml
  - type: DataModel
    url: data-model/modretro-data-model.yml
  x-surface: platform-generated
  x-platform: shopify
  x-platform-surface: ucp
common:
- type: DomainSecurity
  url: security/modretro-domain-security.yml
- type: Website
  url: https://modretro.com/
- type: Documentation
  url: https://modretro.com/agents.md
- type: LLMsTxt
  url: llms/modretro-llms.txt
- type: MCPServer
  url: mcp/modretro-mcp.yml
- type: WellKnown
  url: well-known/modretro-well-known.yml
- type: Authentication
  url: authentication/modretro-authentication.yml
- type: OAuthScopes
  url: scopes/modretro-scopes.yml
- type: Conventions
  url: conventions/modretro-conventions.yml
- type: Idempotency
  url: conventions/modretro-conventions.yml
- type: RateLimits
  url: rate-limits/modretro-rate-limits.yml
- type: ErrorCatalog
  url: errors/modretro-problem-types.yml
- type: Conformance
  url: conformance/modretro-conformance.yml
- type: DataModel
  url: data-model/modretro-data-model.yml
- type: Lifecycle
  url: lifecycle/modretro-lifecycle.yml
- type: ChangeLog
  url: changelog/modretro-changelog.yml
- type: Packages
  url: packages/modretro-packages.yml
- type: Plans
  url: plans/modretro-plans-pricing.yml
- type: AgentSkill
  url: skills/_index.yml
- type: GitHubOrganization
  url: https://github.com/ModRetro
- type: Support
  url: https://support.modretro.com/
- type: HelpCenter
  url: https://support.modretro.com/
- type: Community
  url: https://forums.modretro.com/
- type: Blog
  url: https://modretro.com/blogs/blog
- type: BlogRSS
  url: https://modretro.com/blogs/blog.atom
- type: Pricing
  url: https://modretro.com/collections/all
- type: SignUp
  url: https://modretro.com/customer_authentication/redirect?locale=en&region_country=US
- type: TermsOfService
  url: https://modretro.com/policies/terms-of-service
- type: PrivacyPolicy
  url: https://modretro.com/policies/privacy-policy
x-enrichment:
  date: '2026-08-26'
  status: enriched
  artifacts_added: 24
  pass: local-v1

ModRetro API — frequently asked questions

Does ModRetro have an API?

Yes. APIs.io lists 1 API from ModRetro, including ModRetro Agent Commerce API (UCP over MCP).

How do I authenticate with the ModRetro API?

ModRetro documents its authentication (openIdConnect/oauth2/http · 3 schemes). The details are profiled on APIs.io as Modretro Authentication.

Does ModRetro have an MCP server?

Yes. APIs.io lists 1 MCP server for ModRetro: Remote MCP server at modretro.com over HTTP requiring OAuth; 13 tools listed.

Is the ModRetro API ready for AI agents?

ModRetro has a Kin Score of 32.1 out of 100 (thin) and an Agent Readiness score of 23.4 (agent-aware), scored by API Evangelist on 2026-10-31.

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