Get a Telegram notification only when a word is used on a channel

Question

I'm subscribed to a Telegram channel that sometimes sends more than 20 messages a minute but I'm really interested in one or two of those messages a day.

The messages I'm interested in all will contain a particular word.

So far what I do is to mute the channel and several times during the day I go and search for that particular word.

Is there a way to get any kind of notification for this case?
Is there a bot or service that will send me a personal message when a condition like this is met?

Is my solution the only way?

_{for the curios the channel is https://t.me/newportal and I'm only interested in new portals for my region}

Solution

You can use the Junction Bot - it allows you to follow channels and filter the messages - without joining the channel.

From the bot help message:

I can collect all posts from your favorite Telegram and Twitter channels, so you can read them like a news feed. Also you can use me inside groups and to forward one channel into another.

Steps:

1. Start the bot.
2. After choosing a language, send the bot the channel you're interested at - newportal.
3. Send the bot a filter command, with the string that interest you:
   • Format: /filter @channel_name mustHave text_to_pass (get the full /filter command usage by sending the /filter command to the bot).
   • For example, send /filter @newportal mustHave (ru) to get only the messages with the text (ru) from the channel @newportal.
4. If you want, you can set the bot to forward those message to another channel - so in that case, you can create a new channel for your area.

Note: The bot help message states that it can take around 10 minutes of delay until you get the updates.

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Here's the full Junction Bot FAQ

Comments

[DGaleano]

It says it will work for 30 days and then I should contact the admin. I guess they will ask for some fee. Let's see how it goes.

[arieljannai]

I haven't noticed that!

[arieljannai]

So was it useful/worth it?

[DGaleano]

yes. it is still working fine.

[DGaleano]

I can only mark one as an answer but this works fine and it is quite simple to use.

[DGaleano]

This project closed. This answer is not valid anymore. It worked for a while but authors stop the project.

[DGaleano]

As today this still works fine while the bot from the other answer no longer works.

[Pankaj Singhal]

This bot is mostly paid now. Is there any other solution to this?

[arieljannai]

@PankajSinghal Sorry, no idea. I don't need it anymore so not following alternatives.

[JustAGuy]

Can anyone explain how is this possible? I mean, you cant invite a bot over to a channel unless you're an owner of that channel. How are they doing this?