This guide provides a step-by-step walkthrough of how to use Sixth to build an existing MCP server from a GitHub repository.

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Finding an MCP Server

There are multiple places online to find MCP servers:
  • Sixth can automatically add MCP servers to its list, which you can then edit. Sixth can clone repositories directly from GitHub and build the servers for you.
  • GitHub: Two of the most common places to find MCP servers on GitHub include:
  • Online directories: Several websites list MCP servers including: These directories allow users to sort the servers by various criteria such as downloads, date, stars, and use case. Each entry provides information such as features, tools, and configuration instructions.
  • PulseMCP: This website has a blog post discussing how AI could use MCP servers to make websites obsolete. PulseMCP also includes an FAQ section about MCP servers: https://www.pulsemcp.com/

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Building with Sixth

  1. Initiate the Process: Provide Sixth with the following information:
    • GitHub Repository URL: The URL of the server’s repository.
    • README.md Contents: This is optional but helpful for Sixth to understand the server’s purpose and configuration. You can copy the README.md file from the GitHub repository.
  2. Example Interaction with Sixth: 
    User: "Sixth, I want to add the MCP server for Brave browser control. Here's the GitHub link: @https://github.com/modelcontextprotocol/servers/tree/main/src/brave-search Can you add it?"

Sixth: "OK. Cloning the repository to the MCP directory. It needs to be built because it has a 'package.json' file. Should I run 'npm run build'?"

User: "Yes, build it."

Sixth: "Build complete. This server needs a browser path. Where's your Brave browser executable?"

User: "It's in '/Applications/Brave Browser.app/Contents/MacOS/Brave Browser'."

Sixth: "OK. I've updated the server config with that path and added it to 'sixth_mcp_settings.json'. Anything else?"

User: "No, that's all. Let's test it."

Sixth: "Great! Starting the MCP Inspector to test the server connection. After that, we can try controlling the browser from Sixth."
  3. Sixth’s Actions: Based on your instructions, Sixth will perform the following:
    • Repository Cloning: Sixth will clone the repository to your local machine, usually in the directory specified in your configuration.
    • Tweaking: You can guide Sixth to modify the server’s configuration. For instance:
      • User: “This server requires an API key. Can you find where it should be added?”
      • Sixth may automatically update the sixth_mcp_settings.json file or other relevant files based on your instructions.
    • Building the Server: Sixth will run the appropriate build command for the server, which is commonly npm run build.
    • Adding Server to Settings: Sixth will add the server’s configuration to the sixth_mcp_settings.json file.

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Testing and Troubleshooting

  1. Test the Server: Once Sixth finishes the build process, test the server to make sure it works as expected. Sixth can assist you if you encounter any problems.
  2. MCP Inspector: You can use the MCP Inspector to test the server’s connection and functionality.

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Best Practices

  • Understand the Basics: While Sixth simplifies the process, it’s beneficial to have a basic understanding of the server’s code, the MCP protocol (learn more), and how to configure the server. This allows for more effective troubleshooting and customization.
  • Clear Instructions: Provide clear and specific instructions to Sixth throughout the process.
  • Testing: Thoroughly test the server after installation and configuration to ensure it functions correctly.
  • Version Control: Use a version control system (like Git) to track changes to the server’s code.
  • Stay Updated: Keep your MCP servers updated to benefit from the latest features and security patches.