Can either server read incoming messages?

Telegram MCP can. It exposes get_messages, list_messages, search_messages, get_history, wait_for_new_message, and wait_for_settled_message, all backed by the full MTProto session. LINE MCP cannot read incoming messages through this server; the LINE Messaging API delivers inbound events via webhook rather than polling, and this server has no tool for it.

Which is right for notifying customers in East Asia?

LINE is the natural fit if your audience is in Japan, Taiwan, or Thailand, where LINE dominates over other messaging apps. The broadcast_text_message and broadcast_flex_message tools reach all followers in one call, and push_flex_message lets you send structured cards to individual users. Telegram is better for an international or technical community where Telegram is the chosen platform.

Telegram vs LINE

Telegram MCP and LINE MCP both put a messaging platform in an agent's hands, but they are built for very different jobs. The Telegram server drives a real user account through MTProto and exposes well over a hundred tools: sending and scheduling messages, forwarding, editing, deleting, pinning, polling, reacting, and pressing inline buttons; deep group and channel administration including promote_admin, demote_admin, ban_user, unban_user, set_default_chat_permissions, toggle_slow_mode, edit_admin_rights, get_recent_actions, and invite link management; contact management including add_contact, import_contacts, block_user, and export_contacts; media tools for send_file, send_album, send_voice, send_sticker, and send_gif; and folder, draft, and privacy-settings management across multiple configured accounts. LINE's official server, by contrast, connects to a LINE Official Account through the Messaging API and offers twelve focused tools: push_text_message, push_flex_message, broadcast_text_message, broadcast_flex_message, get_profile, get_message_quota, get_follower_ids, get_rich_menu_list, create_rich_menu, set_rich_menu_default, cancel_rich_menu_default, and delete_rich_menu. The split is a full personal-account automation surface versus a focused outbound-messaging and rich-menu management set.

How they compare

Dimension	Telegram	LINE
Surface size and scope	Well over a hundred tools covering every major feature of a personal Telegram account: messaging, scheduling, group and channel administration, contacts, media, folders, drafts, privacy, and profile management across multiple accounts.	Twelve focused tools: push and broadcast text or flex messages to followers, look up a follower's profile and quota, and manage the account's rich menus.
Account model	Drives your real Telegram user account via Telethon and MTProto. It can read and write DMs, join or leave groups, administer channels, and do anything you can do in the app.	Connects to a LINE Official Account through the LINE Messaging API with a CHANNEL_ACCESS_TOKEN. It sends from the brand account rather than a personal user account.
Messaging capabilities	send_message, send_scheduled_message, edit_message, forward_message, delete_message, reply_to_message, create_poll, send_reaction, pin_message, press_inline_button, and more.	push_text_message and push_flex_message for targeted sends; broadcast_text_message and broadcast_flex_message to all followers. No edit, reply, poll, or reaction tools.
Group and channel administration	create_group, create_channel, invite_to_group, leave_chat, promote_admin, demote_admin, ban_user, unban_user, set_default_chat_permissions, toggle_slow_mode, edit_admin_rights, get_admins, get_banned_users, and invite link tools.	No group or channel administration tools. The account model is a brand page, not a personal account with groups.
Best-fit task	Automating or triaging a personal Telegram account: reading inboxes, replying to threads, moderating a community group or channel, managing contacts, or sending media at scale.	Sending formatted notifications and broadcast messages to a brand's LINE followers, managing rich menus for the account, and tracking monthly message quota.

Verdict

Telegram MCP fits when you need deep control of a personal account or community: reading messages, running group moderation, managing contacts, or sending media and scheduled messages across many chats. LINE MCP fits when you are running a brand's LINE Official Account and need to push or broadcast text and flex messages to followers, manage rich menus, and track quota. The surface sizes are not comparable: Telegram's server has over a hundred tools to LINE's twelve. Pick LINE if your audience lives on it and your job is outbound messaging from a brand page; pick Telegram if you need full account automation including reading, administration, and cross-chat coordination.

FAQ

Can either server read incoming messages?: Telegram MCP can. It exposes get_messages, list_messages, search_messages, get_history, wait_for_new_message, and wait_for_settled_message, all backed by the full MTProto session. LINE MCP cannot read incoming messages through this server; the LINE Messaging API delivers inbound events via webhook rather than polling, and this server has no tool for it.
Which is right for notifying customers in East Asia?: LINE is the natural fit if your audience is in Japan, Taiwan, or Thailand, where LINE dominates over other messaging apps. The broadcast_text_message and broadcast_flex_message tools reach all followers in one call, and push_flex_message lets you send structured cards to individual users. Telegram is better for an international or technical community where Telegram is the chosen platform.