Does messaging API have Boardcast API

I have found only multicast API that send message to multiple users, however it needs to specify UserID and it is limited up to 150 users. So does messaging API have boardcast API that can call to send message to all users who added Bot account?

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That was my solution as well. You can also collect user IDs from messages that have SourceUser, but that would be far too resource intensive for most purposes.

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I cannot find any API that you request, but you can do something else here.

Line Message API has "Follow event". This event trigged when someone add your bot as a friend (follow your bot) and will send userId also.

So you have to collect all userId when they follow your bot for use multicast sending.

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本当によろしいですか? question.vm