A production AI agent often depends on separate tools for orchestration, vector search, scheduling, observability, and SaaS integrations. Sim on GitHub combines those functions in an open-source workspace for building, deploying, and monitoring agents. The project has passed 30,000 GitHub stars and reports more than 100,000 builders.

Sim also provides centralized controls for model access, permissions, spending, and data. Its recent Model Context Protocol support extends those capabilities to Claude Code, Codex, and other MCP clients, allowing coding agents to create, deploy, run, and inspect workflows from a terminal.

One workspace, fewer moving parts

Sim is a TypeScript monorepo built with Next.js, Bun, PostgreSQL, Drizzle, and ReactFlow. Teams can construct agents through a visual canvas, conversational instructions, or code.