aid: ocra
name: OCRA
description: >-
  OCRA (OATH Challenge-Response Algorithm) is a standard for generating
  one-time passwords based on challenge-response authentication as defined
  in RFC 6287. It extends HOTP and TOTP with challenge-response capabilities
  for stronger authentication scenarios.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
  - Authentication
  - OCRA
  - OTP
  - Security
url: >-
  https://raw.githubusercontent.com/api-evangelist/ocra/refs/heads/main/apis.yml
created: '2026-03-16'
modified: '2026-04-28'
specificationVersion: '0.19'
apis: []
common:
  - type: Reference
    url: https://datatracker.ietf.org/doc/html/rfc6287
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com