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How to install Ethereum & EVM Message Signing in Codex

To install Ethereum & EVM Message Signing in Codex, run "codex mcp add ethereum-evm-message-signing -- uvx signing-mcp-server" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated yesterday

  1. 1

    Run the install command

    In a terminal, run:

    codex mcp add ethereum-evm-message-signing -- uvx signing-mcp-server
  2. 2

    Check it

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

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

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Questions

Does Ethereum & EVM Message Signing work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and Ethereum & EVM Message Signing installs with the steps above.

Ethereum & EVM Message Signing 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 & EVM Message Signing safe?

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