A full TypeScript walkthrough for building an MCP server
11/02/2026 — 11/02, 08:14·1 sources (all)·1 reports (all)
Key takeaways
- This walkthrough defines a tool with the MCP TypeScript SDK and Zod, serves it locally to Claude Code and Cursor over stdio, then exposes th…
Background & analysis
On November 2, 2026, the AI section of DEV Community published a technical walkthrough titled "Building an MCP Server in TypeScript", adapted from a post on scriptmasterlabs.com. The piece lays out how to build an MCP server in TypeScript end to end, and it is the only report so far, so the walkthrough stands at the initial publication stage with no follow-up coverage yet.
The author's approach is to define tools once using the MCP TypeScript SDK together with Zod, then run the server locally over stdio for clients such as Claude Code or Cursor, and expose the same tool handlers over streamable HTTP for remote callers. This single-definition, dual-transport pattern means a tool's schema and logic do not need to be written twice: the stdio server handles local, single-user sessions, while the HTTP server reuses the handlers for network clients.
The article provides runnable code for each stage of the build. It also flags a classic stdio pitfall: never write logs to stdout while running over stdio, because that output corrupts the protocol stream. For local testing and inspection, it points to MCP Inspector as the debugging tool of choice. Finally, it offers a deployment recommendation: when selling tools on a per-call basis, run in stateless streamable HTTP mode, so that 402 payment challenges and retries work without any session affinity requirements on the server side.
AI-generated from 1 reports · updated 4 days ago
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This walkthrough defines tools once with the MCP TypeScript SDK and Zod, serves them locally over stdio for clients like Claude Code and Cursor, then exposes the same handlers over streamable HTTP for remote callers. It ships runnable code at every step and warns that logging to stdout over stdio corrupts the protocol stream.
DEV Community · AIAI score 61
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