How to install s3 in Codex

To install s3 in Codex, run "codex mcp add s3 --env AWS_ACCESS_KEY_ID=YOUR_AWS_ACCESS_KEY_ID --env AWS_SECRET_ACCESS_KEY=YOUR_AWS_SECRET_ACCESS_KEY -- npx -y s3-aws-mcp-server" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 13 days ago

Run the install command

In a terminal, run:

codex mcp add s3 --env AWS_ACCESS_KEY_ID=YOUR_AWS_ACCESS_KEY_ID --env AWS_SECRET_ACCESS_KEY=YOUR_AWS_SECRET_ACCESS_KEY -- npx -y s3-aws-mcp-server

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

MCP servers run with your permissions. If s3 needs an API key, add it under env in the config. Check its README.

Install s3 in another app

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Questions

Does s3 work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and s3 installs with the steps above.

s3 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 s3 safe?

It scores 83 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.