Telegram bots — the official Bot API

Telegram holds the chat. Your database holds everything you will act on later. Every serious bot defect is an update that was processed twice, or one that was never delivered because nobody asked for it.

The Bot API is not where bots fail. They fail at the seam: the update redelivered after a crash, the member event that never arrives because of a default nobody read, the payment confirmed from the wrong signal, the broadcast that trips 429 at user 31 and silently stops.

Read against the Bot API on 2026-08-25, at version 10.3 (released 2026-08-24). Re-check core.telegram.org/bots/api-changelog before quoting a version: this API ships roughly monthly.

Deep material, loaded on demand: