Sema MCP server

What it does

Sema is a Lisp interpreter that treats LLM calls and agent loops as language primitives. It exposes evaluation, compilation, building, formatting, and documentation tools for Sema code, enabling developers to write LLM-powered scripts with built-in support for cost tracking, caching, multi-turn conversations, and tool dispatch.

• Write a coding agent that can read files, edit code, and run shell commands with automatic cost tracking and spending limits.
• Build a multi-turn chatbot that maintains conversation state as immutable data and switches between LLM providers with automatic fallback.
• Extract structured data from text and images using the llm/extract and llm/extract-from-image functions, with cached results to avoid redundant API calls.

Tools this server exposes

Tool	Does
eval	Evaluate Sema code and execute it.
compile	Compile Sema code to bytecode.
build	Build a Sema project into a binary.
format	Format Sema code according to language conventions.
docs	Generate or retrieve documentation for Sema language features and built-in functions.

Before you enable it

An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.