PostozoHow to connect Slack to Postozo
Paste a few details from Slack and start scheduling. This guide shows where to find each detail, each screen in Postozo, and how to fix common errors.
What you need before you start
- A Slack app with the chat:write and files:write bot scopes, installed in your workspace.
- The Channel ID of the channel to post in, and the app invited to that channel.
Slack connects with details you copy from Slack (a key, token or app password). Postozo checks them with Slack before saving and stores them encrypted.
Connect Slack step by step
Step 1. Open Add Channel
Sign in to Postozo. On the Calendar, press Add Channel at the top of the channel list. A window opens with a tile for every network. Find the Slack tile and press it. Each tile also has a How to connect link that opens this guide.
If the tile says Coming soon on this server, the server you use has not added its Slack app keys yet. Ask the person who runs your Postozo server. On postozo.com this is done for you.
Step 2. Fill in your Slack details
A form opens. It asks for 2 details: Bot token, Channel ID. Under each field, press Where do I find this? to see the exact steps. We copy those steps below.
Bot token
- Go to api.slack.com/apps and press Create New App, then From scratch.
- Open OAuth and Permissions. Under Bot Token Scopes add chat:write and files:write.
- Press Install to Workspace and allow it.
- Copy the Bot User OAuth Token. It starts with xoxb-.
Channel ID
- In Slack, open the channel.
- Click the channel name at the top to open its details.
- The Channel ID is at the bottom, for example C0123456789. Copy it.
- Invite the app to the channel: type /invite @ and your app name in the channel.
Step 3. Press Connect
Postozo checks the details with Slack before it saves anything. If something is wrong, the form stays open and shows what to fix. Nothing is saved until the check passes. The details are stored encrypted.
Step 4. Check the new channel
Back on the Calendar, the new channel shows in the channel list on the left, with a small Slack badge on its picture. A message at the bottom says it is connected. You can now pick it in the post editor.
Step 5. Set your preferences
Press the 3 dots next to the channel to open its menu. From here you can set Preferences (default settings for every new post on this channel), edit time slots, move the channel to a customer, reconnect, turn it off or delete it.
Common errors and how to fix them
| What you see | What to do |
|---|---|
| "The Slack app is not in #channel yet" | In the channel, type /invite @ followed by your app name. Then press Connect again. |
| "Slack has no channel that this app can see" | Copy the Channel ID again from the channel details. It starts with C. |
| "A bot token starts with xoxb-" | Copy the Bot User OAuth Token, not a user token or an app token. |
| A red message under a field | The value does not have the right format. The message says what it should look like. |
| "We could not reach Slack right now" | Slack did not answer. Wait 1 minute and press Connect again. |
| "Your plan allows N channels" | You reached the channel limit of your plan. Remove a channel you do not use, or upgrade in Billing. |
How to reconnect
If the Slack details stop working (for example you deleted the key or changed the password), Postozo marks the channel with a warning and pauses its posts. Press the 3 dots next to the channel, then Reconnect channel. The same form opens. Paste the new details and press Reconnect. The channel keeps its posts, time slots and preferences.
How to disconnect Slack
Press the 3 dots next to the channel, then Delete. Postozo removes the channel and deletes its stored details right away. Upcoming and draft posts for that channel are removed too. Posts that are already live stay on Slack. You need the admin or owner role in your workspace to delete a channel.
To cut access on the network side as well, delete the key, token or app password you created there.
Want to pause instead? Choose Disable Channel in the same menu. Its posts wait until you turn it back on.
What you can post on Slack
Slack markdown (mrkdwn). Files are uploaded to the channel. Follow-up comments become replies in the thread.
Read more on the Slack channel page.
More connection guides
Questions
Can I post in threads?
Yes. Follow-up comments become replies in the thread.
Do I need a paid Slack plan?
No. A free workspace can install your own app.
Does connecting Slack cost extra?
No. There is no extra charge per network. Each connected account counts as 1 channel toward the channel limit of your plan.
What if the Slack tile says Coming soon on this server?
The server you use has no Slack app keys yet. The server admin adds them in Admin, Networks.
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