Build AI agents with a modern TypeScript stack
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. The evals system provides model-graded, rule-based, and statistical scorers to measure agent output quality. Studio displays performance dashboards and allows users to run experiments and compare agent versions.
Mastra integrates directly with Next.js, Express, Hono, and other frameworks. Users can import agents into existing routes, use AI SDK UI for chat interfaces, and deploy alongside their app or as standalone services.
Mastra provides a TypeScript framework with integrated Studio UI for building agents, built-in observability (traces, logs, metrics), and evals system for testing agent quality. Users can prototype in minutes with npm create mastra and deploy as APIs or embedded in apps.
Mastra provides persistent memory with thread and resource scoping, automatic context recall, and token usage tracking. Memory Gateway handles input/output tokens at market rate + 5.5%, with configurable retention windows and retrieval storage.
Mastra includes built-in guardrails processors for input/output security: PromptInjectionDetector, PIIDetector, ModerationProcessor, and SystemPromptScrubber. These can block, redact, or rewrite harmful content before it reaches the model or user.