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How to install Ethereum & EVM Message Signing in Antigravity CLI

To install Ethereum & EVM Message Signing in Antigravity CLI, add the "ethereum-evm-message-signing" block to the mcpServers section of ~/.gemini/config/mcp_config.json (remote servers use "serverUrl"), then start agy.

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  1. 1

    Open the MCP config

    Create or open ~/.gemini/config/mcp_config.json for every project, or .agents/mcp_config.json for this project only.

  2. 2

    Add the server

    Paste this. If the file already has servers, add the "ethereum-evm-message-signing" entry inside the existing mcpServers block.

    {
      "mcpServers": {
        "ethereum-evm-message-signing": {
          "command": "uvx",
          "args": [
            "signing-mcp-server"
          ]
        }
      }
    }
  3. 3

    Start Antigravity CLI

    Run agy. The server and its tools load when the session starts.

Config file: ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project)

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 Antigravity CLI?

Yes. Antigravity CLI supports local and remote mcp servers, skills, plugins, and Ethereum & EVM Message Signing installs with the steps above.

Ethereum & EVM Message Signing does not show up in Antigravity CLI. What now?

Restart Antigravity CLI 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.