Slack

Configure the OwlStack WordPress plugin to publish posts to your Slack workspace channels.

Prerequisites

You can connect Slack using either a webhook (simpler) or a bot (more flexible).

Option A: Webhook (Recommended)

Creating a Slack Webhook

Go to Slack API: Incoming Webhooks
Create a new Slack app (or use an existing one)
Enable Incoming Webhooks
Click Add New Webhook to Workspace
Select the target channel and authorize
Copy the Webhook URL

Option B: Bot

Creating a Slack Bot

Go to Slack API and create a new app
Go to OAuth & Permissions
Add the chat:write bot scope
Install the app to your workspace
Copy the Bot Token (starts with xoxb-)
Invite the bot to your target channel with /invite @YourBot

Settings

Navigate to OwlStack > Slack in the WordPress admin.

Field	Description
Bot Token	Slack bot token, starts with `xoxb-` (for bot mode)
Channel	Target channel name, e.g., `#general` (required for bot mode)
Webhook URL	Slack incoming webhook URL (for webhook mode)

Webhook vs. Bot

Use Webhook mode for simple posting to a single channel. Use Bot mode to publish to multiple channels or customize the sender name and icon.

Step-by-step (Webhook)

Go to OwlStack > Slack in your WordPress admin
Paste your Webhook URL
Click Save Settings

Step-by-step (Bot)

Go to OwlStack > Slack in your WordPress admin
Paste your Bot Token
Enter the target Channel (e.g., #general)
Click Save Settings

Testing

After saving your settings:

Click Test Connection to verify your webhook or bot token
Click Send Test Message to post a test message
Check your Slack channel to confirm the message appeared

Publishing

Once configured, Slack appears as a toggle in the OwlStack meta box on post edit screens.

Programmatic publishing

// Simple message
owlstack()->slack('Hello from WordPress!');

// Message to a specific channel (bot mode)
owlstack()->slack('New post published!', null, null, [
    'channel' => '#announcements',
]);

Constraints

Constraint	Value
Max message length	40,000 characters
Max attachments	20
Supported media types	JPEG, PNG, GIF, MP4, PDF
Max file size	1 GB

Troubleshooting

Issue	Solution
"Invalid webhook"	The webhook URL may have been revoked; create a new one
"channel_not_found"	Verify the channel name; for bot mode, invite the bot to the channel first
"not_authed"	Bot token is invalid or expired
Messages not appearing	Ensure the bot has `chat:write` scope and is a member of the channel

Slack

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