If you can’t find your Slack channel in the dropdown menu, you can connect it by using the Channel ID option.
Step 1: Switch to channel ID
When creating your alert, select Channel ID instead of Channel Name.
Step 2: Copy your channel link from Slack
1. Open Slack.
2. Right-click on the channel name.
3. Select Copy > Copy link.
Step 3: Paste channel ID into RSS.app
1. Go back to RSS.app.
2. Paste the copied link into the Channel ID field.
3. Press Enter or click Save.
That's it! Once saved, RSS.app will automatically forward the latest 3 posts from your feed into the selected Slack channel.