The original title is: "A production-ready MCP server template: six architectural decisions explained"

Short summary

The author presents a production-ready MCP server template built around six core architectural decisions: factory pattern for per-request isolation, dual stdio/HTTP transport, Zod-based config and input validation, guarded URL fetching with SSRF protection, stderr-only logging, and in-memory transport testing. The template supports both editor clients (Claude Desktop, Cursor) and remote HTTP deployment with horizontal scaling. A packaged MCP Quickstart Kit includes Docker, CI, and a Stripe-based paid-tools appendix.

• •Factory pattern enables per-request isolation for stateless HTTP while reusing same code for stdio
• •Zod validation at config and tool-input level provides free type safety and clear boot errors
• •Guarded fetch_url tool enforces SSRF protection, byte caps, and timeouts for safe LLM-driven fetching

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