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Gemini CLI Setup

Google's Gemini CLI supports MCP servers. The Gemini web app (gemini.google.com) does not yet support custom MCP connections.

Install Gemini CLI

npm install -g @google/gemini-cli@latest

Configuration

Add the FinPlan server to your Gemini CLI settings.

Location: ~/.gemini/settings.json

{
  "mcpServers": {
    "finplan": {
      "url": "https://mcp.finplan.prethink.io/mcp"
    }
  }
}

Verification

Start Gemini CLI and try a FinPlan command:

gemini

Calculate federal income tax for $85,000 filing single in 2025

Where Else Gemini Supports MCP

  • Android Studio — Enable in File > Settings > Tools > Gemini > MCP Servers
  • Firebase Studio — Configure in .idx/mcp.json

References

Priming the agent

Sometimes agents need to be told to use tools. Making sure it knows about them often helps.

user> 'Do you have access to FinPlan tools for financial planning?'
agent> (inspecting) 'Yes, I do'.