Piston MCP Server
piston-mcp is an MCP server that allows LLMs to connect to and execute code using Piston.
[!WARNING] 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"
]
}
}
}
