MCP Sage
An MCP server project that provides a service for automatically selecting the OpenAI O3 or Google Gemini 2.5 Pro model based on the number of tokens, supports recursive embedding of file paths in prompts, and is suitable for code review and solving complex problems.
2.5 points
8.2K

What is MCP-Sage?

MCP-Sage is an intelligent development assistant tool that can send your code files as context to an AI model to obtain professional code review opinions, modification suggestions, or implementation plans. It is particularly suitable for handling large codebases and can automatically select the most suitable AI model for analysis.

How to use MCP-Sage?

Simply provide the path to your code file and a problem description. MCP-Sage will automatically package the code, analyze the context size, and select the most suitable AI model (OpenAI O3 or Google Gemini) to generate suggestions.

Use Cases

1. Require expert-level code review 2. Need more context when handling large codebases 3. Obtain implementation plans for complex functions 4. Need a 'second opinion' from different AI models

Main Features

Expert Opinion (sage-opinion)
Obtain professional analysis and opinions from AI on the code, supporting large context processing
Code Review (sage-review)
Get specific code modification suggestions, returned in SEARCH/REPLACE format for direct application
Implementation Plan (sage-plan)
Generate high-quality implementation plans for complex functions through multi-model debate
Intelligent Model Selection
Automatically select OpenAI O3 (≤200K tokens) or Google Gemini (≤1M tokens) based on the context size
Advantages
Strong ability to handle large codebases (supports up to 1 million tokens of context)
Automatically select the most suitable AI model to save costs
Provide directly applicable code modification suggestions (in SEARCH/REPLACE format)
Generate more reliable implementation plans through multi-model debate
Automatic fallback mechanism for network failures
Limitations
Generating complex plans may take 5 - 15 minutes
API call costs may be high (especially when using multiple models)
Need to configure both OpenAI and Google API keys for the best experience

How to Use

Installation
Ensure that Node.js (v18 or higher) is installed, clone the repository, and install the dependencies
Configure API Keys
Set environment variables to provide the API keys for OpenAI and/or Google Gemini
Start the Service
Run the service and connect it to your development environment
Use the Tool
Call one of the three main tools through the MCP protocol

Usage Examples

Code Review Example
Add error handling to an existing function
Implementation Plan Example
Add user authentication functionality to an application

Frequently Asked Questions

Do I need to configure both API keys?
Why does sage-plan take so long?
How can I control the API usage cost?
What is the maximum supported file size?

Related Resources

OpenAI API Documentation
Official OpenAI API documentation
Google Gemini API Documentation
Official Google Gemini development documentation
MCP Protocol Description
Official description of the Model Context Protocol
Example Project Repository
Example project using MCP-Sage

Installation

Copy the following command to your Client for configuration
Note: Your key is sensitive information, do not share it with anyone.

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