hyungwoo parkWe chose FastMCP because it treats MCP servers like FastAPI applications. Decorator-based DX: Instead of writing verbose class-based boilerplate, we just use @mcp.tool(). It feels exactly like writing a FastAPI route. Pydantic Native: Since we heavily use Pydantic for data validation (SERP results, GSC data), FastMCP's native integration saved us hours of conversion work. Built-in Image Support: FastMCP makes it incredibly easy to return multimodal responses (images + text), which is crucial for our "Site Health Check" features that visualize data. SSE out-of-the-box: Connecting to Claude Desktop requires a robust Server-Sent Events implementation. FastMCP handles the handshake, keep-alive, and transport details automatically. It's the "FastAPI moment" for the MCP ecosystem.