Skip to main content
Glama
enesjakozh

Joern MCP Server

by sfncat
GitHub
Python
MIT License
19
OverviewInspectNewEndpointsSchemaRelated ServersReviewsScore
Need Help?View Source CodeReport Issue

Joern MCP Server

A simple MCP Server for Joern.

Project Introduction

This project is an MCP Server based on Joern, providing a series of features to help developers with code review and security analysis.

Environment Requirements

  • Python >= 3.10 (default 3.12) & uv
  • Joern

Installation Steps

  1. Clone the project locally:
    git clone https://github.com/sfncat/mcp-joern.git cd mcp-joern
  2. Install Python dependencies:
    uv venv .venv source .venv/bin/activate uv sync

Project Structure

├── server.py # MCP Server main program ├── test_mcp_client.py # Test program for joern server and mcp tool ├── test_sc_tools.py # Direct test program for sc tools ├── common_tools.py # Common utility functions ├── server_tools.py # Server utility functions ├── server_tools.sc # Scala implementation of server utility functions ├── server_tools_source.sc # Scala implementation of server utility functions,use sourceCode to get the source code of method ├── requirements.txt # Python dependency file ├── sample_cline_mcp_settings.json # Sample cline mcp configuration file └── env_example.txt # Environment variables example file

Usage

  1. Start the Joern server:
    joern -J-Xmx40G --server --server-host 127.0.0.1 --server-port 16162 --server-auth-username user --server-auth-password password --import server_tools.sc Or joern -J-Xmx40G --server --server-host 127.0.0.1 --server-port 16162 --server-auth-username user --server-auth-password password --import server_tools_source.sc
    If you are using it under Windows, you may need to set the JVM system variables through the command line or in the system environment variables.
    set _JAVA_OPTIONS=-Dfile.encoding=UTF-8
  2. Copy env_example.txt to .env Modify the configuration information to match the joern server startup configuration
  3. Run the test connection: Modify the information in test_mcp_client.py to confirm the joern server is working properly
    uv run test_mcp_client.py Starting MCP server test... ================================================== Testing server connection... [04/16/25 20:38:54] INFO Processing request of type CallToolRequest server.py:534 Connection test result: Successfully connected to Joern MCP, joern server version is XXX
  4. Configure MCP server Configure the mcp server in cline, refer to sample_cline_mcp_settings.json.
  5. Use MCP server Ask questions to the large language model, refer to prompts_en.md

Development Notes

  • .env file is used to store environment variables
  • .gitignore file defines files to be ignored by Git version control
  • pyproject.toml defines the Python configuration for the project
  • MCP tool development
    • Implement in server_tools.sc, add definitions in server_tools.py, and add tests in test_mcp_client.py

Contribution Guidelines

Welcome to submit Issues and Pull Requests to help improve the project.

Welcome to add more tools.

References

https://github.com/flankerhqd/jebmcp

https://docs.joern.io/server/

https://docs.joern.io/interpreter/

Install Server
A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

How are these scores calculated?

local-only server

The server can only run on the client's local machine because it depends on local resources.

Tools

View all tools

A simple MCP (Multimodal Conversational Plugin) server based on Joern that provides code review and security analysis capabilities through natural language interfaces.

  1. Project Introduction
    1. Environment Requirements
      1. Installation Steps
        1. Project Structure
          1. Usage
            1. Development Notes
              1. Contribution Guidelines
                1. References

                  Related MCP Servers

                  • Vibe Coder MCP

                    freshtechbro
                    A
                    security
                    F
                    license
                    A
                    quality
                    An MCP server that supercharges AI assistants with powerful tools for software development, enabling research, planning, code generation, and project scaffolding through natural language interaction.
                    Last updated -
                    11
                    502
                    68
                    TypeScript
                    • Linux
                    • Apple

                  • Pentest Tools MCP Server

                    ch1nhpd
                    -
                    security
                    F
                    license
                    -
                    quality
                    An MCP server that integrates various penetration testing tools, enabling security professionals to perform reconnaissance, vulnerability scanning, and API testing through natural language commands in compatible LLM clients like Claude Desktop.
                    Last updated -
                    4
                    Python

                  • CodingConverse

                    whyuds
                    -
                    security
                    F
                    license
                    -
                    quality
                    An MCP server that provides user dialogue capabilities for AI code editors, allowing AI to interact with users through dialog boxes when needing input during the coding process.
                    Last updated -
                    Python

                  • My First MCP Server

                    sethdavis512
                    -
                    security
                    F
                    license
                    -
                    quality
                    An AI-powered MCP server that provides development tools for code analysis, documentation, and project management including code pattern extraction, humorous code reviews, TODO scanning, and PRD generation.
                    Last updated -
                    2
                    JavaScript

                  View all related MCP servers

                  Appeared in Searches

                  MCP directory API

                  We provide all the information about MCP servers via our MCP API.

                  curl -X GET 'https://glama.ai/api/mcp/v1/servers/sfncat/mcp-joern'

                  If you have feedback or need assistance with the MCP directory API, please join our Discord server