stdio
- stdio is the MCP transport where the client launches the server as a local process and talks over standard input and output.
In short: stdio is the MCP transport where the client launches the server as a local process and talks over standard input and output. Local stdio servers are a common source of shadow MCP servers. This entry uses the term the way our gateway datasheets do, and links related terms below.
Related terms
By The Datasheet desk · Reviewed 2026-11-03