Connect Slack to Codex

To use Slack in Codex, connect your Slack account in Manyplug and add Manyplug to Codex once. Codex then gets 5 Slack tools, for example: “Search messages”, “List channels”, and “Read a channel”. It takes about 4 minutes and works on the free plan.

Connect Slack Free plan, no card

1. Connect Slack in Manyplug

Click “Connect Slack” and paste the key or app password into Manyplug’s form:

2. Add Manyplug to Codex

Codex CLI and the IDE extension.

Add the server to ~/.codex/config.toml.

[mcp_servers.manyplug]
url = "https://manyplug.com/mcp"

Run codex mcp login manyplug and sign in in the browser.

Full guide: Codex

3. Ask Codex

What did people ask me in Slack today?
Summarise #product since Monday.
Post “Deploy is done” in #releases.
Find the message where Alex shared the Q4 plan.

What Codex can do in Slack

Each action can be turned off per account, and changes can wait for your OK.

Action	Access
Search messages Searches messages in all channels and DMs. Understands Slack filters: from:@user, in:#channel, after:2026-11-01, has:link.	Reads
List channels Channels and direct messages you are in.	Reads
Read a channel Latest messages of a channel or DM, newest first, or a whole thread.	Reads
Send a message Posts to a channel or DM as you, optionally as a thread reply. Slack formatting works.	Risky
Find people Finds people in the workspace by name, username or email.	Reads

Questions

Can I connect two Slack accounts to Codex?

Yes. Connect each one in Manyplug under its own name, for example Work and Personal. Codex can use one of them or all at once.

Will Codex change anything in Slack without asking?

By default these actions wait for your approval before they run: “Send a message”. Other changes follow your rules, which you can make stricter per account.

Do I need an official Slack MCP server for this?

No. Manyplug connects to Slack itself with a key or app password you paste into its form, and gives Codex the tools through one MCP address, together with your other services.

Is it free to connect Codex to Manyplug?

Yes. New workspaces get 14 days of Pro free, then the free plan keeps going with 150 actions a month and up to 3 connected accounts. No card needed. Paid plans start at $5 a month.

Does Codex see my passwords or API keys?

No. Keys are entered on Manyplug’s own pages, stored encrypted with a separate key per account, and the AI only receives tool results.

Slack in other AI apps

Claude ChatGPT Claude Code Cursor VS Code Gemini CLI Windsurf

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