Mastra

Founded by Shane Thomas in 2024

Build, evaluate, and deploy TypeScript agents with structured memory and workflows

Pricing model

Free Tier, Paid

Rating

★ People love it

Time to value

Quick Setup (< 1 hour to try simple agents; more time to configure production workflows and observability)

You can use Mastra to build, test, and run autonomous agents using TypeScript. It provides building blocks for complex workflows with branching, retries, and human-in-the-loop approvals. You can attach long-term memory, semantic recall, and external tools through Model Context Protocol servers. The framework includes built-in observability to trace model interactions, track execution costs, and evaluate output quality against specific benchmarks. You can run agents locally inside Mastra Studio, integrate them into Next.js applications, or deploy them directly to cloud environments with automated deployment tools.

What Mastra does

Write structured agent workflows with parallel execution stepsTrace model latency, error rates, and token expendituresEvaluate agent outputs using rule-based and model-graded metricsPersist conversational memory and user preferences across sessionsExpose internal tools and agent services through MCP serversPause workflow execution to await manual user confirmationTest agent prompts and tools locally inside an interactive interfaceGraph-based workflow engine supporting branching, parallel execution, and step retriesBuilt-in human-in-the-loop controls to pause workflows for manual review or inputObservational memory and semantic recall across conversation threadsNative support for authoring Model Context Protocol (MCP) serversObservability dashboard to track token usage, latency, and call tracesAutomated scoring and evaluation tests for agent outputsLocal developer environment with interactive Studio UI