How to Test an MCP Server: Vitest, In-Memory Transport, Streamable HTTP and the Inspector CLI

Cross-posted from my blog. The original, with any updates, lives on fabwaseem.com. Testing an MCP server means checking three layers: the pure functions behind your tools, the MCP contract (tool list, schemas, results and errors), and the transport your clients actually use. You can cover all three with Vitest and the official TypeScript SDK,... Weiterlesen: How to Test an MCP Server: Vitest, In-Memory Transport, Streamable HT…