EmailOctopus Contact API
Manage subscribers on a list: create, read, update, delete, upsert by email address, and update many at once through the batch endpoint. The upsert (PUT /lists/{list_id}/contacts) is the safe-retry path, since the API publishes no idempotency key. 7 operation(s) in the EmailOctopus v2 OpenAPI 3.1.0.