CILogon's Authorization endpoint (https://cilogon.org/authorize) supports the following optional query parameters:
idphint or selected_idp: A comma-separated list of url-encoded SAML EntityIDs and/or OIDC issuers to be shown to the user in the "Select an Identity Provider" selection list. This parameter complies with AARC-G049 - A specification for IdP hinting and allows a client to specify one or more Identity Providers to be shown to the user. For SAML-based IdPs (e.g., those registered by InCommon and eduGAIN), the entityID value is used. For OIDC-based IdPs (e.g., Google, GitHub, ORCID, Microsoft), the "iss" (issuer) value is used. See https://cilogon.org/idplist/ for the list of identity providers supported by CILogon. https://cilogon.org/include/idplist.xml is also available if more details on SAML entities are needed. If multiple IdPs are specified, the first IdP in the list is used as the initially displayed IdP for new visitors. Example showing Google, GitHub, ORCID, and UIUC: https://cilogon.org?idphint=https%3A%2F%2Faccounts.google.com,https%3A%2F%2Fgithub.com,https%3A%2F%2Forcid.org,urn%3Amace%3Aincommon%3Auiuc.edu
initialidp: A url-encoded SAML EntityID or OIDC issuer to be initially selected in the "Select an Identity Provider" selection list. Typically, ORCID is shown as the default IdP for new users. The "initialidp" parameter allows a client to specify a different IdP to be initially selected. See "idphint" above for the format of the value of this parameter (i.e., entityID for InCommon/eduGAIN IdPs, "iss" (issuer) for OIDC-based IdPs). Notes: (1) The "idphint" parameter takes precedence over "initialidp" since the first IdP in the "idphint" list is used as the default IdP. (2) The "initialidp" parameter only affects new users since a user's previously selected IdP is saved in a browser cookie for future visits. Example showing ORCID as the default IdP: https://cilogon.org?initialidp=https%3A%2F%2Forcid.org
skin: The name of the custom CILogon interface skin for your application. Skins are available for Essential and Full Service subscriptions. Contact help@cilogon.org to request a custom skin.
See below for examples using curl, mod_auth_openidc, and OAuth for MyProxy.
See also: Drupal, Globus, JupyterHub, Galaxy, and Open OnDemand
{"EntityID":"https://idp.csusb.edu/idp/shibboleth","OrganizationName":"California State University, San Bernardino","DisplayName":"California State University, San Bernardino","RandS":true}
