but somehow i managed to send message with chat bot to telegram group using this url below, this url is the same with the url i use in connector config except i text parameter is removed
I don't have any specific experience with connecting alerts with telegram bots, but I have used it with the webhook API interfacing with Slack. What I can tell you is that the structure of the keys portion of the JSON request made from Kibana is really dependent on what the receiving API expects. My best advice would be to review Telegram's docs and maybe see if they have a forum, discord, etc. for new devs. Once you've figured out the keys, then for the values you could start with some static values just to make sure things are working, then replace them with action variables (see docs).
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