Send a bulk outreach sequence to contacts via Front API

Steps

1. Authenticate with 'Bearer YOUR_TOKEN' in the Authorization header.
2. Prepare your contact list by fetching or creating contacts with GET /contacts or POST /contacts — each contact record needs a valid handle (email address or phone number) and a 'source' type.
3. Create a new conversation for each contact with POST /conversations, setting the 'to' field to the contact's handle, selecting the appropriate inbox channel, and providing the 'subject' and initial message body.
4. To use Front Sequences (if your plan includes it), create a sequence via the Sequences API or the Front UI, then enroll contacts programmatically by POST to /sequences/{sequence_id}/contacts with the contact IDs.
5. Monitor conversation status and responses by listing conversations filtered by the relevant inbox using GET /conversations with 'inbox_id' and 'status' query params.
6. Handle opt-outs by watching for incoming replies and tagging or archiving conversations as appropriate via PATCH /conversations/{conversation_id}.