mcp-server-bash-sdk

Why we included this project

Some environments won't let a Node.js or Python runtime in the door, and for those this MCP server written entirely in bash is a good fit: its only dependency is a POSIX shell, so it works in a tiny container, an Alpine edge device, or a locked-down CI runner. The same core code handles both stdio and Streamable HTTP against the 2026-07-28 stateless revision of the protocol, so the two transports stay in sync. Defining a tool is just writing a function named tool_* in the script, which makes it approachable for teams who already live in bash, and the repo includes unit tests, HTTP-transport tests, and a conformance test against the official schema, plus a walkthrough for building your own. The appeal is a server you can read through line by line and patch with confidence when a full runtime feels like overkill.