Slack + Codex integration
Connect Slack to Codex
ConnectChats brings your Slack chats into Codex. Ask Codex to catch you up, find any message and draft replies. Nothing gets sent until you approve it.
Free to start. No app to install. Every send needs your OK.
What Codex can do with your Slack
ConnectChats gives Codex a small set of tools. Codex calls them when you ask about your Slack chats, and only for the chats you share.
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Catch you up
Ask what you missed and Codex reads your unread Slack chats, then gives you the short version: who needs an answer, what was decided, what can wait.
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Find any message
The address someone sent last month, the price a client agreed to, the link from a group chat. Codex searches your Slack history and quotes the message.
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Draft replies
Codex writes the reply in your tone, in the chat's language, with the context of the whole thread. You read it, edit it, and send it.
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Send with your OK
When you approve a draft, ConnectChats sends it from your own Slack account and confirms delivery. Auto-send only runs in chats where you switch it on.
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Things to ask Codex
Type these in Codex once Slack is linked.
- Codex
Summarize the Slack channels I missed this morning.
- Codex
What did the team decide about the launch date on Slack?
- Codex
List every Slack message that is waiting on me.
- Codex
Find the Slack thread where we discussed the pricing change.
- Codex
Draft a reply in Slack confirming I'll send the report by Thursday.
How to connect Slack to Codex
It takes about two minutes. You do it once, and the same account then works in every AI app you add.
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Add ConnectChats to Codex
- In your terminal, run: codex mcp add connectchats --url https://api.connectchats.com/mcp
- Run codex mcp login connectchats. Your browser opens the ConnectChats sign-in page. Sign in with your passkey.
- Start Codex and ask about your messages.
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Link your Slack account
- Open https://connectchats.com/app and choose Link a chat app, then Slack.
- Sign in to your Slack workspace with your own Slack account.
- ConnectChats lists your channels and direct messages, and you choose which ones to share with your AI app.
- To add another workspace, repeat the sign-in for it.
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Pick the chats Codex can see
Every chat is listed in your ConnectChats dashboard. Share all of them or only the ones you choose. Codex never sees the rest.
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Ask Codex about your Slack
Open a new conversation in Codex and ask about your chats. Codex calls ConnectChats when it needs your messages.
How Slack and Codex work together
ConnectChats links to Slack when you sign in to your workspace from the ConnectChats dashboard. Your AI app sees the channels and direct messages your own account can see. ConnectChats does not install a bot in your workspace or read channels you are not in.
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Slack in ConnectChats
Direct messages, group messages and the channels you belong to are supported, including thread replies. Each linked chat starts with its last 200 messages, then every new message arrives as it is sent. On Slack's free plan, Slack only shows the last 90 days of messages, so older ones cannot be imported either. Messages your AI app sends go out from your own Slack account, after you approve them. The free plan links 2 chat apps and keeps messages for 30 days.
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ConnectChats in Codex
Codex adds remote MCP servers from the command line and keeps them in config.toml. Add ConnectChats once, sign in with your passkey, and Codex can read and search the chats you share. The command writes a [mcp_servers.connectchats] entry with url = "https://api.connectchats.com/mcp" to ~/.codex/config.toml. You can also add it there by hand. Codex CLI, the Codex IDE extension and the desktop app share this configuration, so you set it up once. On a machine without a browser, run codex mcp login connectchats --no-browser, open the printed link elsewhere and paste the redirect URL back. Codex needs a ChatGPT plan that includes Codex, or an OpenAI API key.
Your Slack stays under your control
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You pick the chats
Codex only sees the Slack chats you share. Unshare a chat and it disappears from every AI app at once.
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Drafts by default
Codex prepares replies. You approve each one before it reaches Slack, unless you turn on auto-send for that chat.
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Stored messages are encrypted
Stored messages are encrypted with a key that only your passkey can unlock. We never train models on your messages.
Questions
Can Codex read my Slack messages?
Yes, once you link Slack in ConnectChats and add ConnectChats to Codex. Codex reads only the chats you share, and only when you ask it something that needs them.
Can Codex send Slack messages for me?
Codex can draft a reply and send it after you approve it. Messages go out from your own Slack account. You can allow automatic sending for specific chats, and it stays off everywhere else.
Is the Slack to Codex integration free?
Yes. The free plan links two chat apps and works in every supported AI app, with no limit on what you ask. No card needed.
Do I need to install anything?
No. You add ConnectChats inside Codex and link Slack from your browser. There is no app to download and nothing runs on your computer.
Does it work with other AI apps too?
Yes. The same ConnectChats account works in ChatGPT, Claude, Grok, Manus, Muse and any AI app that supports remote MCP servers. Link Slack once and use it everywhere.
Does my Slack admin need to approve ConnectChats?
ConnectChats signs in as you rather than installing an app in the workspace, so there is nothing for an admin to add. Some companies forbid third party clients in their policies, so check yours before you link a work account.
Does it see private channels?
Only the ones you are a member of, because it sees what your own account sees. You still choose which channels are shared with your AI app.
Is this the same as adding ConnectChats to ChatGPT?
No. ChatGPT on the web does not read your Codex config, so you add ConnectChats there separately. Both use the same ConnectChats account.
Can Codex send messages from a script?
Codex can create drafts in any run. They are only sent after you approve them, unless you turn on auto-send for that chat.
Related pages
Slack with other AI apps
Other chat apps in Codex
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