Add Subscriber
Add one consented subscriber to an AWeber list. This is not a bulk-import endpoint; AWeber considers bulk use abuse and directs large imports to its list importer. Adding a subscriber can start autoresponder follow-ups, and supplied tags can trigger Campaign automation. Review list permission and consent before calling. This tool is create-only and does not update an existing subscriber; use an explicit update tool for existing records. HTTP 201 confirms creation, not message delivery.