The AI coding agent that never compacts
From the team behind Gatsby, Mastra is a framework for building AI-powered apps and agents with workflows, memory, streaming, evals, tracing, and Studio, an interactive UI for dev and testing. Start building: npm create mastra@latest
Mastra's observability platform captures traces, logs, and metrics automatically. Built-in scorers (model-graded, rule-based, statistical) evaluate agent outputs. Studio displays real-time performance dashboards, token usage, and cost tracking. Users can run evals in CI/CD pipelines or live against production traces.
Mastra workflows enable typed, durable multi-step processes with control flow. Agents support persistent memory (conversation context, application state) across sessions. Memory Gateway provides token-based retrieval storage. Workflows integrate with agents, tools, and external APIs seamlessly.
Mastra adapts to Next.js, React, Express, Astro, SvelteKit, Hono, and other frameworks. Users import agents directly into route handlers, use AI SDK UI for chat interfaces, and deploy alongside existing infrastructure. Mastra handles auth, custom routes, and middleware integration.
Mastra includes guardrails processors for input/output security: PromptInjectionDetector, PIIDetector, ModerationProcessor, SystemPromptScrubber, and CostGuardProcessor. Processors run before/after LLM calls, block or redact harmful content, and support custom violation callbacks for alerting.
Mastra provides a TypeScript framework with npm create mastra one-command setup, pre-built agent templates, and integrated Studio UI for testing agents without leaving the IDE. Users can prototype agents in minutes and deploy to Next.js, Express, Hono, or standalone services.