card.io

card.io was a mobile SDK company that provided fast, easy credit-card scanning inside iOS and Android apps using the device camera, letting users capture card details by holding a card up to the lens instead of typing them. Founded around 2011 and backed by Uncork Capital (then SoftTech VC), card.io was acquired by PayPal in 2012. Its scanning SDKs for iOS, Android, Cordova, and React Native were open-sourced in December 2014 under the card-io GitHub organization, and the product was ultimately discontinued. The company operated no public REST or web API; its product surface was a set of client-side mobile SDKs, all of which are now archived. This profile is maintained for network completeness and historical/portfolio context.

card.io is profiled on the APIs.io network. Tagged areas include Company, Payments, Mobile, SDK, and Credit Cards.

card.io’s developer surface includes documentation and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.9/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyPaymentsMobileSDKCredit CardsComputer VisionCard ScanningDefunct

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 10.9/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 3.0 / 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/cardio: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

SourceCode

Packages

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: cardio
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/cardio.png
name: card.io
description: card.io was a mobile SDK company that provided fast, easy credit-card scanning inside iOS and Android apps using
  the device camera, letting users capture card details by holding a card up to the lens instead of typing them. Founded around
  2011 and backed by Uncork Capital (then SoftTech VC), card.io was acquired by PayPal in 2012. Its scanning SDKs for iOS,
  Android, Cordova, and React Native were open-sourced in December 2014 under the card-io GitHub organization, and the product
  was ultimately discontinued. The company operated no public REST or web API; its product surface was a set of client-side
  mobile SDKs, all of which are now archived. This profile is maintained for network completeness and historical/portfolio
  context.
url: https://raw.githubusercontent.com/api-evangelist/cardio/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-status: defunct
x-status-detail: Acquired by PayPal (2012); SDKs open-sourced (2014) and later discontinued/archived.
x-backed-by:
- uncork-capital
x-acquired-by: paypal
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Payments
- Mobile
- SDK
- Credit Cards
- Computer Vision
- Card Scanning
- Defunct
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.card.io
- type: GitHubOrganization
  url: https://github.com/card-io
- type: Documentation
  url: https://github.com/card-io/card.io-iOS-SDK/blob/master/README.md
- type: SourceCode
  name: card.io iOS SDK (archived)
  url: https://github.com/card-io/card.io-iOS-SDK
- type: SourceCode
  name: card.io Android SDK (archived)
  url: https://github.com/card-io/card.io-Android-SDK
- type: Packages
  url: packages/cardio-packages.yml
- type: SDKs
  url: packages/cardio-packages.yml
- type: DomainSecurity
  url: security/cardio-domain-security.yml
- type: LLMsTxt
  url: llms/cardio-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence