Arizona State University

ASU WebAuth (CAS single sign-on)

ASU operates an enterprise single sign-on service using the Central Authentication Service (CAS) protocol for authenticating ASURITE accounts across university web applications. A bare GET returns a structured 401 error document, so the service is live and protocol-correct; integration is restricted to ASU-approved service providers and there is no public registration path.

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Documentation

📖
Authentication
https://raw.githubusercontent.com/api-evangelist/arizona-state-university/refs/heads/main/authentication/arizona-state-university-authentication.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: arizona-state-university:sso-cas
name: ASU WebAuth (CAS single sign-on)
description: ASU operates an enterprise single sign-on service using the Central Authentication Service
  (CAS) protocol for authenticating ASURITE accounts across university web applications. A bare GET returns
  a structured 401 error document, so the service is live and protocol-correct; integration is restricted
  to ASU-approved service providers and there is no public registration path.
humanURL: https://getprotected.asu.edu/services/identity-and-access-management/password-services
baseURL: https://weblogin.asu.edu/cas
tags:
- Identity
- Authentication
- SSO
- CAS
- Gated
properties:
- type: Authentication
  url: authentication/arizona-state-university-authentication.yml
x-operator: institution
x-operator-evidence: Host weblogin.asu.edu is ASU's own registrable domain, fronted by Cloudflare CDN
  only.
x-probe:
  baseURL_status: 401
  probed: '2026-09-01'
  note: The previously recorded documentation pointer getprotected.asu.edu/services/identity-and-access-management/authentication-services
    now returns 403 "Access denied" and has been replaced with the password-services page from the site's
    own sitemap, which returns 200.