Hi there, I was recently playing with the PKCE support in Keycloak (server) which worked quite well. However the support for client / adapters seems to be quite limited at the moment... I think support for PKCE to all? java adapters could be added quite easily - I could provide a PR but I'm currently stuck with finding a generic way to store the codeVerifier generated for the login redirect for later retrival for the code2token exchange. Do you have any recommendations for this? I created the following JIRA issue (with some comments) to track this: https://issues.jboss.org/browse/KEYCLOAK-7467 Cheers, Thomas