create-slash-command.md

How to create a Slash command

Create a Slack app on https://api.slack.com/apps
Create a new Slash command in app management on Slack. A number of fields to fill out, but most important are:
- Command name: what the user should type after /
- Request URL: URL of the Slack app backend. When the user do type the command, Slack will send a POST request to the Request URL. It needs to be publicly accessible and it needs to be able to handle the requests from Slack.
Sample request from Slack

  %{
    "api_app_id" => "A02DMAGNJ21",
    "channel_id" => "C02FFNUTGBS",
    "channel_name" => "priv-test-video",
    "command" => "/meet",
    "is_enterprise_install" => "false",
    "response_url" =>
      "https://hooks.slack.com/commands/T033NA***/2763195051441/9Euw22LTMOHkjqK8cfgE4wVI",
    "team_domain" => "telnyx",
    "team_id" => "T033NA***",
    "text" => "",
    "token" => "RSVU4xGkEEwBYIZrM9GJGTcN",
    "trigger_id" => "2752826282196.3124344411.690a4adfbdb8bf7f4a86dba3529445c0",
    "user_id" => "U02DKE08LUA",
    "user_name" => "qingwu"
  }

Respond using Block kit
Verify request signature https://api.slack.com/authentication/verifying-requests-from-slack

References

The Slack app for /meet: https://api.slack.com/apps/A02DMAGNJ21/general?
Source code for /meet app backend: https://github.com/team-telnyx/slack-video-meet
I've done a talk at Elixir Australia meetup about how /meet was built, which was recorded and on Youtube https://www.youtube.com/watch?v=O_61JddRvq0. It might offer more details

wiserfirst/create-slash-command.md

How to create a Slash command

References