Catchback Cards website screenshot

Catchback Cards

Catchback Cards (CatchBack) is a Y Combinator (Winter 2026) company building a mobile and web platform for trading card collectors, focused on Pokemon and sports cards. Collectors open digital mystery packs to receive physical cards, receive instant buyback offers paid out via Venmo or PayPal, and trade cards through a $1 marketplace. The platform differentiates on transparency: it lets creators build custom mystery packs with personalized chases and customized odds using cryptographically trusted tooling, and publishes open-source verification so collectors can independently validate pack randomness and odds. The company launched its iOS app on January 25, 2026 and is a seven-person team based in San Francisco. Catchback Cards is a consumer application and does not currently publish a public API, developer portal, or OpenAPI definition; this profile is maintained in the API Evangelist network as a portfolio lead and is enriched only with independently verifiable facts.

Catchback Cards is profiled on the APIs.io network. Tagged areas include Company, Trading Cards, Collectibles, Marketplace, and Consumer.

🌐 Visit website 📡 Source on GitHub
8.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5
0 APIs
CompanyTrading CardsCollectiblesMarketplaceConsumerMobilePaymentsY Combinator

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 8.3/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
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/catchback-cards: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Catchback Cards Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: catchback-cards
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/catchback-cards.png
name: Catchback Cards
description: 'Catchback Cards (CatchBack) is a Y Combinator (Winter 2026) company building a mobile and web platform for trading
  card collectors, focused on Pokemon and sports cards. Collectors open digital mystery packs to receive physical cards, receive
  instant buyback offers paid out via Venmo or PayPal, and trade cards through a $1 marketplace. The platform differentiates
  on transparency: it lets creators build custom mystery packs with personalized chases and customized odds using cryptographically
  trusted tooling, and publishes open-source verification so collectors can independently validate pack randomness and odds.
  The company launched its iOS app on January 25, 2026 and is a seven-person team based in San Francisco. Catchback Cards
  is a consumer application and does not currently publish a public API, developer portal, or OpenAPI definition; this profile
  is maintained in the API Evangelist network as a portfolio lead and is enriched only with independently verifiable facts.'
url: https://raw.githubusercontent.com/api-evangelist/catchback-cards/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
x-batch: W26
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Trading Cards
- Collectibles
- Marketplace
- Consumer
- Mobile
- Payments
- Y Combinator
common:
- type: DomainSecurity
  url: security/catchback-cards-domain-security.yml
- type: Website
  url: https://catchbackcards.com
- type: GitHubOrganization
  url: https://github.com/CatchBack-Cards
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence