Capital One

Capital One Authorizations API

The Capital One Authorizations API lets approved partners programmatically validate and authorize financial transactions against Capital One's platform in real time. It supports payment authorization decisioning and fraud-reduction workflows for merchants and fintechs integrating with Capital One card products. Access is OAuth 2.0 secured through DevExchange, with a sandbox for pre-production testing and a partner-approval gate for production. Reference material is HTML documentation on the portal; there is no publicly downloadable machine-readable specification.

GitHub

Documentation

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Documentation
https://developer.capitalone.com/documentation/o-auth

API entry from apis.yml

apis.yml Raw ↑ 
aid: capital-one:authorizations-api
name: Capital One Authorizations API
tags:
- Authorizations
- Payments
- United States
baseURL: https://api-sandbox.capitalone.com
humanURL: https://developer.capitalone.com/products/authorizations?id=658618-1
properties:
- url: https://developer.capitalone.com/documentation/o-auth
  type: Documentation
description: The Capital One Authorizations API lets approved partners programmatically validate and authorize
  financial transactions against Capital One's platform in real time. It supports payment authorization
  decisioning and fraud-reduction workflows for merchants and fintechs integrating with Capital One card
  products. Access is OAuth 2.0 secured through DevExchange, with a sandbox for pre-production testing
  and a partner-approval gate for production. Reference material is HTML documentation on the portal;
  there is no publicly downloadable machine-readable specification.