How to install Slack MCP Server in Codex

To install Slack MCP Server in Codex, run "codex mcp add slack-mcp-server -- npx -y @sigmacomputing/slack-mcp-server" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 8 months ago

Run the install command

In a terminal, run:

codex mcp add slack-mcp-server -- npx -y @sigmacomputing/slack-mcp-server

2
Check it
Inside Codex, type /mcp to see the server and its tools.

MCP servers run with your permissions. If Slack MCP Server needs an API key, add it under env in the config. Check its README.

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Questions

Does Slack MCP Server work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and Slack MCP Server installs with the steps above.

Slack MCP Server does not show up in Codex. What now?

Restart Codex fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Slack MCP Server safe?

It scores 55 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.