FastMCP Scala Server

Example Use Cases

• 1

  Implement MCP servers in Scala with asynchronous and effectful programming support.

• 2

  Expose tools, prompts, and resources via annotation-driven APIs with automatic JSON Schema generation.

• 3

  Flexible transport options including standard IO and HTTP with session and streaming support.

Description

FastMCP-Scala is a high-level, developer-friendly Scala 3 library designed to build MCP servers efficiently. It features ZIO-based effect handling, annotation-driven API definitions, and automatic JSON Schema and handler generation via Scala 3 macros. The library supports two transport modes—standard input/output and HTTP with session management and SSE streaming—allowing seamless integration with the Java MCP SDK 1.0.0. It is suitable for both lightweight stateless servers and full-featured streamable HTTP servers.