Transports

Transport choice is the most important template decision in the current toolkit.

basic: stdio

The basic template uses:

new StdioServerTransport()

Choose it when you want the smallest starting point and a local-process integration style.

http, auth, and full: Streamable HTTP

These templates use:

new StreamableHTTPServerTransport({
  sessionIdGenerator: undefined,
})

and expose /mcp over Express on port 3100 by default.

Important precision

The repository README uses broader transport language in places. For this documentation, the verified implementation is what matters:

• the generated transport is Streamable HTTP
• the generated code listens on process.env.PORT || 3100
• the generated route returns a helpful JSON response for GET /mcp