Building Streamable HTTP MCP Servers from Scratch using FastMCP in 2026 (opens in new tab)

If you've spent any time wiring up tools for an AI agent, you know the pain: every model vendor has its own function-calling format, every integration is bespoke glue code, and every model upgrade breaks something downstream. MCP changes this by providing a shared interface for tools, data sources, and AI clients. Instead of rebuilding integrations for every model or app, you expose capabilities once through an MCP server and let compatible clients connect to them. Anthropic released the Mode...