How to install Catalog MCP in Codex
To install Catalog MCP in Codex, run "codex mcp add catalog-mcp -- npx -y @a2ui/catalog-mcp" in your terminal, then type /mcp in Codex to check it.
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Run the install command
In a terminal, run:
codex mcp add catalog-mcp -- npx -y @a2ui/catalog-mcp - 2
Check it
Inside Codex, type /mcp to see the server and its tools.
MCP servers run with your permissions. If Catalog MCP needs an API key, add it under env in the config. Check its README.
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Questions
Does Catalog MCP work in Codex?
Yes. Codex supports mcp servers in the codex cli and ide extension, and Catalog MCP installs with the steps above.
Catalog MCP 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 Catalog MCP safe?
It scores 94 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
