FastMCP — TypeScript Framework for MCP Servers

Main

• Start with stdio transport for local clients, then switch to HTTP streaming when you need remote access and better large-payload handling.
• Use inspect early—debugging tool schemas and outputs is cheaper than iterating via full agent runs.
• Leverage built-ins listed in README (sessions, request IDs, auth, CORS, health checks) to avoid rolling your own scaffolding.

Source-backed notes

• README shows npm install fastmcp and provides a minimal server Quickstart with addTool(...) + start(...).
• README lists a CLI for testing/debugging, including npx fastmcp dev ... and npx fastmcp inspect ....
• README documents remote options like HTTP streaming and stateless mode for serverless deployments.

FAQ

• Is it an SDK replacement?: No—README says it’s built on top of the official MCP SDK and wraps common patterns.
• Can I run it remotely?: Yes—README includes HTTP streaming transport and related options for remote access.
• What should I validate first?: Tool schemas and outputs via inspect, then client connectivity, then auth/headers.