How to install Sezzlee OpenAPI in Codex

To install Sezzlee OpenAPI in Codex, run "codex mcp add sezzlee-openapi -- npx -y @sezzlee/openapi-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 sezzlee-openapi -- npx -y @sezzlee/openapi-mcp

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

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

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Questions

Does Sezzlee OpenAPI work in Codex?

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

Sezzlee OpenAPI 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 Sezzlee OpenAPI safe?

It scores 81 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.