# Opt-In Processes Endpoints related to opt-in workflows and subscription confirmation processes. These operations support compliant subscriber onboarding, including single and double opt-in flows. ## List Opt-in Processes - [GET /list](https://developers.klicktipp.com/management-api/opt-in-processes/api.optin.index.md): Lists the IDs and names of all opt-in processes. Notice: The Id without a name is the Default Double Opt-In present in each KlickTipp Account. ## Get Opt-in Process - [GET /list/{listid}](https://developers.klicktipp.com/management-api/opt-in-processes/api.optin.retrieve.md): Returns the complete data of an opt-in process. ## Search Redirect URL - [POST /list/redirect](https://developers.klicktipp.com/management-api/opt-in-processes/api.optin.redirect.md): Search the redirection URL for a specific opt-in process.