Telegram Bot API

Rock-solid, zero-dep HTTP+long-poll API. getUpdates?limit=5 works beautifully for a single-process consumer; the moment a second process polls, both will intermittently get 409 Conflict: terminated by other getUpdates request. Set up a shared offset or use webhooks if you need multi-process. sendMessage with parse_mode=MarkdownV2 is strict about escaping; HTML is easier. 20+ months of production use, zero outages.