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How to install Opera Devtools MCP in Gemini CLI

Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install Opera Devtools MCP by running "gemini mcp add opera-devtools-mcp npx -y opera-devtools-mcp", then type /mcp to check it.

Built from the published package · server updated yesterday

  1. 1

    Run the install command

    In a terminal, run:

    gemini mcp add opera-devtools-mcp npx -y opera-devtools-mcp
  2. 2

    Check it

    Inside Gemini CLI, type /mcp to list servers and tools.

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

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Questions

Does Opera Devtools MCP work in Gemini CLI?

Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Opera Devtools MCP installs with the steps above.

Opera Devtools MCP does not show up in Gemini CLI. What now?

Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Opera Devtools MCP safe?

It scores 73 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.