Can I opt-in or opt-out a user via API? Gupshup February 09, 2022 05:58 Updated Yes, you can use APIs to mark a user as opted-in or opted-out for your Access API app. See API document for opt-in and opt-out APIs. Related articles How do I opt-in users? How do I send a template message using the API? How to get a verified tick? How will my display name show to end users? Which languages are supported for message templates? Are special characters and emojis are allowed in template messages? Comments 0 comments Please sign in to leave a comment.