Mastra AI

Mastra is an open-source TypeScript framework for building AI agents and agent-powered applications. It’s aimed at TypeScript teams who want agents that can reason, use tools, keep context over time, and be tested and monitored as they move toward production.

If you’re already working in Node.js, React, or Next.js, Mastra lets you register agents and workflows on a server, then run the same app locally and deploy it as a standalone server. It also includes a UI (Mastra Studio) for building, testing, and managing agents, workflows, and tools.

Key capabilities you’ll likely care about:

• Agents (typed in TS): define agent instructions, choose a model, and attach tools in a TypeScript-first way.
• Workflows (graph-based orchestration): compose multi-step processes with explicit control flow (including branching and parallel steps).
• Memory (durable context): add observational memory and semantic recall so agents can stay consistent across runs.
• Tools + MCP: author tools and support Model Context Protocol (MCP) servers so other MCP-capable systems can interact with your resources.
• Observability and evals: trace model calls and tool calls, track metrics (like latency and cost), collect datasets for repeatable evaluation, and score agent runs with evals.
• Model router: route across many models through one interface, with access to thousands via the Mastra model router ().