Hello DanielH547, _ Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API. _ Both of V3's Bulk Import endpoints (JSON and CSV) work similarly to uploading a file via the Website UI, in that it will only add list memberships (rather than remove any), and will only update contact fields that are provided via the file based on the email address of the contact. _ If you were to add a contact via one of the Bulk Import endpoints to list C, but they were already on lists A and B, they would now be on lists A, B, and C. _ Import Contacts using a JSON Payload (POST /activities/contacts_json_import) https://developer.constantcontact.com/api_reference/index.html#!/Bulk_Activities/bulkImportContactsJSON _ Import Contacts using a CSV File (POST /activities/contacts_file_import) https://developer.constantcontact.com/api_reference/index.html#!/Bulk_Activities/contactsCSVImport _ Please have a look and let us know if you have any other questions! ... View more

Hello DanielH547,   Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.   Both of V3's  Bulk Import endpoints (JSON and CSV) work similarly to uploading a file via the Website UI, in that it will only add list memberships (rather than remove any), and will only update contact fields that are provided via the file based on the email address of the contact.   If you were to add a contact via one of the Bulk Import endpoints to list C, but they were already on lists A and B, they would now be on lists A, B, and C.   Import Contacts using a JSON Payload (POST /activities/contacts_json_import) https://developer.constantcontact.com/api_reference/index.html#!/Bulk_Activities/bulkImportContactsJSON   Import Contacts using a CSV File (POST /activities/contacts_file_import) https://developer.constantcontact.com/api_reference/index.html#!/Bulk_Activities/contactsCSVImport   Please have a look and let us know if you have any other questions! ... View more

Hello DanielH547,   Thank you for reaching out to Constant Contact API Developer Support.    The Access Token Information endpoint is only compatible with old uncopied keys that still use our old authorization management service, and will not work with the new JWT access tokens. As of March 31, 2022, this POST method is being depreciated. To view the scopes associated with an access token, parse the access token (JWT) claims.   If you're unfamiliar with parsing JWTs, I'd suggest looking for a standalone JWT decoder tool or doing it in code. There are many free JWT decoders available online. If doing it in code, the OpenID Foundation maintains a list of libraries implementing JWT and JOSE specs, which may be a good starting point. Their list can be found here: https://openid.net/developers/jwt/   Please have a look and let us know if you have any other questions! ... View more

HelloDanielH547,   Thank you for reaching out to Constant Contact API Developer Support.    While the way that our system is built doesn’t allow for functionality like that at this time, here are some alternatives using the V3 API’s Bulk Activity Endpoints that may be helpful based on your use case:   You can use the the Bulk Activity Endpoint for Importing Contacts to update a group of new or existing contacts based on their email addresses, which includes the ability to add them to a list and functions similarly to uploading contacts via a file in the UI:   Bulk Activity Endpoint for Importing Contacts https://v3.developer.constantcontact.com/api_guide/import_contacts.html   When using the Bulk Activity Endpoint to Delete Contacts, you can delete a group of contacts based on being members of a specific list:   Bulk Activity Endpoint for Deleting Contacts https://v3.developer.constantcontact.com/api_guide/deleting_contacts.html   Please have a look and let us know if you have any other questions! ... View more

Hello DanielH547,   Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.   The list of valid activity types that can be returned in the Get Contact Activity Details request is as follows:   em_sends - Send activities em_opens - Email open tracking activities em_clicks - Link click-through tracking activities em_bounces - Bounce tracking activities em_optouts - Opt-out tracking activities em_forwards - Forward to a friend tracking activities   These activity types are also listed towards the top of the reference documentation for the Get Contact Activity Details request.   GET Contact Activity Details: https://v3.developer.constantcontact.com/api_reference/index.html#!/Contacts_Reporting/getContactTracking   Please have a look and let us know if you have any other questions!   Regards, ... View more