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LNS2905

Gemini Chat MCP

by LNS2905
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Python
Local

Gemini Chat MCP

A simple MCP server for chatting with Google Gemini and custom Gems.

Features

  • Chat with Gemini - Send messages and receive responses (text + images)

  • Custom Gems support - Chat with your custom Gems by providing gem_id

  • Model selection - Choose between Gemini 3 Pro (default) or Gemini 2.5 Flash

  • Auto cookie sync - Chrome extension automatically syncs cookies

Installation

cd C:/Working/gemini-chat-mcp pip install -e .

Configuration

Option 1: Chrome Extension (Recommended)

  1. Open Chrome and go to chrome://extensions/

  2. Enable "Developer mode"

  3. Click "Load unpacked" and select the chrome-extension folder

  4. Login to gemini.google.com

  5. Click the extension icon to verify cookies are synced

The extension runs a local server on port 52525 that the MCP server uses to fetch cookies automatically.

Option 2: Manual .env

Copy .env.example to .env and fill in your cookies:

GEMINI_SECURE_1PSID=your_psid_here GEMINI_SECURE_1PSIDTS=your_psidts_here

To get cookies manually:

  1. Login to gemini.google.com

  2. Open DevTools (F12) → Application → Cookies

  3. Copy __Secure-1PSID and __Secure-1PSIDTS values

Usage with Amp

Add to your settings.json:

{ "amp.mcpServers": { "gemini-chat": { "command": "python", "args": ["C:/Working/gemini-chat-mcp/src/gemini_chat_mcp/server.py"] } } }

Or using module:

{ "amp.mcpServers": { "gemini-chat": { "command": "python", "args": ["-m", "gemini_chat_mcp"], "cwd": "C:/Working/gemini-chat-mcp" } } }

Tools

chat

Chat with Gemini. Can generate text and images.

Parameter

Type

Required

Description

message

string

✅

Message to send to Gemini

gem_id

string

❌

Custom Gem ID from URL

model

string

❌

gemini-3-pro

(default) or

gemini-2.5-flash

Example - Basic chat:

{"message": "Hello, how are you?"}

Example - Chat with custom Gem:

{ "message": "Hello!", "gem_id": "10wwoIn-UvdTVzg4rFH3szi4wk8oTo8Cf" }

Example - Use specific model:

{ "message": "Explain quantum computing", "model": "gemini-2.5-flash" }

set_cookie

Update cookies when they expire.

Parameter

Type

Required

Description

psidts

string

✅

New

__Secure-1PSIDTS

value (starts with

sidts-

)

psid

string

❌

New

__Secure-1PSID

value (starts with

g.a

)

How to get Gem ID

From a Gem URL like:

https://gemini.google.com/gem/10wwoIn-UvdTVzg4rFH3szi4wk8oTo8Cf

The Gem ID is: 10wwoIn-UvdTVzg4rFH3szi4wk8oTo8Cf

Project Structure

gemini-chat-mcp/ ├── src/gemini_chat_mcp/ │ ├── __init__.py │ ├── __main__.py │ └── server.py # Main MCP server ├── chrome-extension/ # Cookie sync extension │ ├── manifest.json │ ├── background.js │ ├── popup.html │ ├── popup.js │ └── icons/ ├── .env.example ├── .gitignore ├── pyproject.toml └── README.md

License

MIT

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