Gemini Mcp Tool 🔌 MCP server Free

What it does

Gemini MCP Tool is an MCP server that lets Claude (and other MCP clients) hand off large-context work to Google's Gemini backend. When a codebase or file set is too big for the calling model's own context window, Claude can delegate the analysis to Gemini through this server and get a synthesized answer back, instead of truncating files or skipping context.

Tools it gives your agent

• ask-gemini — sends an analysis request to Gemini, with @file syntax to attach specific files or whole directories
• sandbox-test — runs generated code in an isolated sandbox before it touches your project
• Slash commands /analyze, /sandbox, /help and /ping for direct, non-agentic use
• Configurable Gemini model selection (defaults to gemini-2.5-pro)

Works with

Built for Claude Code and Claude Desktop; the MCP protocol means any other MCP-compatible client can add it too, though it's only tested against Claude.

How to install or connect

claude mcp add gemini-cli -- npx -y gemini-mcp-tool

Or add it to claude_desktop_config.json directly:

{
  "mcpServers": {
    "gemini-cli": { "command": "npx", "args": ["-y", "gemini-mcp-tool"] }
  }
}

Maintenance and safety

MIT-licensed, unofficial and not affiliated with Google, with 2,200+ stars and active issue traffic. Important: Google retired the standalone Gemini CLI on 18 June 2026 in favor of the Antigravity CLI; this tool now defaults to the Antigravity backend, and only accounts still on an unaffected enterprise/paid tier should set GEMINI_MCP_BACKEND=gemini to keep using the original CLI path.

Who should use it

Claude Code or Claude Desktop users hitting context limits on large repos or file sets who want a second, high-capacity model to summarize or analyze them without leaving their existing workflow.