How to install Ethereum Transaction Builder in Codex

To install Ethereum Transaction Builder in Codex, run "codex mcp add ethereum-transaction-builder -- uvx transaction-mcp-server" 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 ethereum-transaction-builder -- uvx transaction-mcp-server

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

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

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Questions

Does Ethereum Transaction Builder work in Codex?

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

Ethereum Transaction Builder does not show up in Codex. What now?

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

Is Ethereum Transaction Builder safe?

It scores 67 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.