Channel connection is how a Telegram channel gets linked to Autogram: you promote the Autogram bot to administrator of the channel, and Telegram reports that promotion to the bot in real time. Autogram's detection service reads the promotion, matches it to your account, and offers a one-click connect that re-verifies the bot's admin rights before saving the channel. The bot also confirms the result directly in Telegram at each step, so nothing about the process depends on the browser tab staying open.
Telegram tracks a bot's own membership status in every chat it belongs to and reports a change through a my_chat_member update — the same mechanism that reports a bot being kicked or demoted. Adding the Autogram bot as an administrator of a channel fires exactly one such update, delivered to Autogram's webhook the moment the promotion happens. That update carries the chat's id and title, plus the Telegram account that performed the promotion — the piece Autogram uses to attribute the channel to an Autogram user.
A promotion is recorded as a detected channel, not a connected one — Autogram treats it strictly as a hint. The frontend can then offer that channel as a one-click connect, but accepting it re-runs the full verification: Autogram asks Telegram for the channel's current administrator list and checks that the connecting user's Telegram identity is still on it, rather than trusting the earlier promotion event. A detection can go stale — the bot might be removed and re-added, or the channel might change hands — so nothing is saved without that live recheck.
Autogram answers in Telegram at the moment of promotion and again at the moment of connection, and the two are different messages. Only the second, sent once the channel is actually saved to your account, is reachable for most channels — the promotion DM depends on a genuine status change and stays silent for a channel the bot already administered before you ever opened Autogram. For that case, forwarding any post from the channel into a private chat with the bot serves the same purpose: Autogram verifies the forwarding account is really an administrator of the channel it claims, then offers the same one-click connect.
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