PNPeter Ndumiainpeterndumia.hashnode.dev·Aug 9 · 7 min readBuilding a Secure MCP Server for File Processing: Auth, Rate Limiting, and IdempotencyMost write-ups on building an MCP server focus on the protocol itself: defining tools, handling requests, wiring up a client. That part is genuinely straightforward. What gets skipped over far more of00