Arena Club

Arena Club is a technology-first trading-card and collectibles platform founded in 2022 by entrepreneur Brian Lee and baseball Hall-of-Famer Derek Jeter, operating as Arenaclub.com, Inc. The company combines AI- and computer-vision-assisted card grading, an insured physical vault with 24/7 surveillance and climate control, a digital "Showroom" where collectors organize vaulted cards into collections, and an online marketplace for buying, selling and trading slabbed sports and trading-card-game cards. Members submit cards for grading and vaulting, browse and transact in the marketplace, open digital packs, and can retrieve physical cards from the vault on demand. Arena Club ships web and native iOS/Android apps but publishes no public developer program, API documentation, or machine-readable API contract.

Arena Club is profiled on the APIs.io network. Tagged areas include Company, Collectibles, Trading Cards, Marketplace, and E-Commerce.

Arena Club’s developer surface includes support, signup flow, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.3/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Collectibles Trading Cards Marketplace E-Commerce Sports Grading Consumer

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 12.3/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 3.3 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments 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/arena-club: 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 →

Security Posture 1

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

Arena Club Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Marketplace

Marketplace

Source (apis.yml)

aid: arena-club
name: Arena Club
description: Arena Club is a technology-first trading-card and collectibles platform founded in 2022 by entrepreneur Brian
  Lee and baseball Hall-of-Famer Derek Jeter, operating as Arenaclub.com, Inc. The company combines AI- and computer-vision-assisted
  card grading, an insured physical vault with 24/7 surveillance and climate control, a digital "Showroom" where collectors
  organize vaulted cards into collections, and an online marketplace for buying, selling and trading slabbed sports and trading-card-game
  cards. Members submit cards for grading and vaulting, browse and transact in the marketplace, open digital packs, and can
  retrieve physical cards from the vault on demand. Arena Club ships web and native iOS/Android apps but publishes no public
  developer program, API documentation, or machine-readable API contract.
url: https://raw.githubusercontent.com/api-evangelist/arena-club/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-source-url: https://forgeglobal.com/arena-club_stock/
x-tier: stub
x-tier-reason: harvest
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:
  - security
  generated: '2026-09-02'
  method: derived
specificationVersion: '0.23'
created: '2026-08-06'
modified: '2026-08-06'
image: https://assets.arenaclub.com/homepage_assets/social_img.png
tags:
- Company
- Collectibles
- Trading Cards
- Marketplace
- E-Commerce
- Sports
- Grading
- Consumer
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/arena-club-domain-security.yml
- type: Website
  url: https://arenaclub.com
- type: Marketplace
  url: https://arenaclub.com/marketplace
- type: Support
  url: https://arenaclubsupport.zendesk.com/hc/en-us
- type: SignUp
  url: https://arenaclub.com/signup
- type: TermsOfService
  url: https://info.arenaclub.com/tos
- type: PrivacyPolicy
  url: https://info.arenaclub.com/privacy
- type: GitHubOrganization
  url: https://github.com/arenaclub
- type: LLMsTxt
  url: llms/arena-club-llms.txt
x-enrichment:
  date: '2026-08-06'
  status: minimal
  artifacts_added: 3
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: Arena Club ships a Next.js web app and native iOS/Android apps backed by an undocumented Express service at api.arenaclub.com,
    but publishes no developer portal, no API reference, no SDK and no machine-readable contract - every OpenAPI, GraphQL,
    MCP, agent-card and /.well-known probe against arenaclub.com, api.arenaclub.com and info.arenaclub.com returned 404.
  evidence:
  - url: https://api.arenaclub.com/openapi.json
    status: 404
  - url: https://api.arenaclub.com/graphql
    status: 404
  - url: https://api.arenaclub.com/.well-known/agent-card.json
    status: 404
  - url: https://arenaclub.com/.well-known/api-catalog
    status: 404
  checked: '2026-08-06'

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