How to make POST to Slack's url?

Question

I can't make simple POST to Slack's url.

I need POST like this:

{ "text": "" }

to url like https://something.slack.com/services/XXXXXXXX/XXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXX

Answer 1

A curl command like this will work:

read -r -d '' PAYLOAD << EOM
{"attachments": [{
    "text": "Hello world!"
  }]
}
EOM
curl --data-urlencode "payload=$PAYLOAD" "https://something.slack.com/services/XXXXXXXX/XXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXX"