piston-mcp
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@piston-mcprun python code that prints the first 10 Fibonacci numbers"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
As of Feb 15, 2026,Piston API is no longer publicly available and requires an authorization token. This means piston-mcp will no longer work with the publicly hosted instance of Piston.
Installation
You can try out piston-mcp locally without cloning it.
Install uv
To try out piston-mcp you'll need to install uv:
# On MacOS and Linux
curl -LsSf https://astral.sh/uv/install.sh | sh
# On Windows
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"Install MCP Client
You will also need to download an MCP client to connect to piston-mcp, such as Claude Desktop.
Update MCP Client Configuration
Update the MCP client's configuration with the following configuration to connect to piston-mcp:
{
"mcpServers": {
"piston": {
"command": "uv",
"args": [
"tool",
"run",
"--from",
"git+https://github.com/alvii147/piston-mcp.git@main",
"piston_mcp"
]
}
}
}For Claude Desktop, the configuration file is usually found in:
# On MacOS and Linux
~/Library/Application\ Support/Claude/claude_desktop_config.json
# On Windows
%APPDATA%\Claude\claude_desktop_config.jsonUsage
Once you've followed the steps above, your MCP client should be able to run code for you:

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