is API access only available to active license.? Home › Forums › Newsletter Plugin Support › is API access only available to active license.? This topic has 2 replies, 2 voices, and was last updated 2 years, 6 months ago by Benjamin Ekuma Okokoh. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts February 10, 2022 at 12:53 pm #281815 Benjamin Ekuma OkokohParticipant I see the APi doc, and try to do subscribe via APi and the api keep saying “” “code”: “newsletter_rest_authentication_error”, “message”: “Authentication error: invalid keys”, February 10, 2022 at 1:37 pm #281819 StefanoKeymaster Hi, how are you calling the api? February 12, 2022 at 7:03 am #281948 Benjamin Ekuma OkokohParticipant from postman, I read the documentation. Author Posts Check out our premium plans with priority support. Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In