JUMP TOPublic APIPublic API Docs HomeAuthenticationiFrameErrorsCustom WebhooksGet WebhooksgetCreate WebhookpostUpdate WebhookputDelete WebhookdeleteGDPR GET RequestgetGDPR DELETE RequestdeleteSonar Ruby GemAccount APIsCreate new Sonar AccountpostGET All Users from AccountgetGET User by IDgetInvite new UserpostGET Account RolesgetCreate New Role & PermissionpostDouble Opt-In PromptpostCustomer APIsGET CustomergetAdd/Update CustomerpostDELETE Customer PropertiesdeleteUnassign AgentpostClose CustomerpostEventspostMessaging APIsAvailable Phone NumbergetAppend Tag to An Existing MessagepostSend CampaignpostSend Personalized CampaignpostSend MessagepostFollow-Up EndpointpostRemove Follow-UpdeleteGET Conversation by IDgetPowered by Follow-Up Endpointpost https://www.sendsonar.com/api/v1/customers/follow_ups