1. Get an API key
Create a key from the dashboard under API keys. Keys look likesf_live_… and carry the permissions of your workspace. Keep them
secret — treat a key like a password.
Every request is authenticated with
Authorization: Bearer sf_live_…. See Authentication.2. Create an inbox
mail.sentfrom.ai domain — no DNS
setup required. (Want your own brand? See Custom domains.)
3. Send an email
id, thread_id, and the Message-ID header — keep
the thread_id to follow the conversation.
4. Receive the reply
When the customer replies, SentFromAI threads it and POSTs amessage.received
event to your webhook. Register one in two lines:
secret (once) — use it to verify deliveries. Full
flow in Receiving email.
Next: explore the concepts
Inboxes, sending, receiving, and threading explained.

