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.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles Catchback Cards the way a machine reads it — 1 machine-readable artifact, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Catchback Cards scores 8.3/100 (minimal), with a separate agent-readiness read of 0/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Catchback Cards
Each block below is one kind of artifact we hold for Catchback Cards. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Security Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Catchback Cards — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Company 1
The organization behind the API
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