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Mastra

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Mastra is an all-in-one TypeScript framework for building AI agents and workflows with RAG, memory, MCP support, evals, and an interactive playground.

Screenshot of Mastra website

Mastra is a comprehensive, modern TypeScript framework for building AI-powered applications and agents. From the team behind Gatsby, Mastra provides everything you need to go from idea to production-ready AI workflows.

Key Features:

  • Agent Framework - Build agents with workflows, RAG, memory, tools, and MCP integration
  • Interactive Playground - Visualize and iterate on agents and workflows in a local dev studio
  • Built-In Evals - Track agent performance with model-graded, rule-based, and statistical methods
  • Flexible Deployment - Deploy as APIs or bundle with Next.js, Express, Hono, and more
  • Full Observability - Trace agent calls, token usage, and logs with your preferred platform

Whether you're building browser agents, research tools, or data extraction workflows, Mastra provides the TypeScript foundation for production AI.

Web scraping workflow

How to use Mastra in a web scraping pipeline

Mastra workflows define task sequences with explicit steps and input/output schemas. They can coordinate model-assisted extraction around a separately supplied HTTP or browser tool while keeping the overall collection path controlled.

A practical workflow

  1. Start a workflow with allowed source URLs and a declared output shape.
  2. Use a step to invoke your acquisition code, another to transform or interpret returned content, and a validation step before publication.
  3. Save accepted records with their source and capture references, then return the dataset or job identifier to the caller.

When it fits

Use this when an application mixes deterministic processing with model-assisted interpretation and needs to control which step receives which data. Explicit step contracts make it easier to isolate a parsing failure from an agent's reasoning output.

Boundaries

Mastra is not a managed scraper or proof of built-in rendering. Provide the acquisition tool, runtime and appropriate credentials separately. Treat collected pages as untrusted inputs, restrict tool actions and validate model-produced fields against the source; workflow completion alone does not establish factual accuracy.

Categories:
Features:
Open SourceJavaScript SDKWorkflow AutomationREST APISelf-HostedMCP Integration

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Source code

mastra-ai/mastra

Metrics recorded 2026-10-16

Repository details

License source: Repository license file

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Frequently asked questions

What is Mastra used for?

Mastra is a TypeScript framework for building AI agents and applications. It provides agents, tools, workflows, memory and observability components. You configure the models and integrations used by your application.

Sources (checked ): Mastra documentation

Is Mastra AI free?

Mastra’s core framework is Apache-2.0 licensed. Enterprise features have a separate source-available license, and the managed platform has a free Starter allowance with paid usage beyond its limits. Model providers and self-hosted infrastructure can also incur costs.

Sources (checked ): Mastra license at verified commit e1478fc (2026-10-01); Mastra Enterprise Edition License v2.0 (effective 2026-09-22), verified commit e1478fc; Mastra pricing

What are some good alternatives to Mastra?

LangChain and Pydantic AI are other frameworks for building applications or agents around language models. Compare supported languages, tool interfaces, workflow control and observability with the needs of your application.

Sources (checked ): Mastra documentation; LangChain documentation; Pydantic AI

What are the key differences between Mastra and LangChain?

Mastra is built around a TypeScript application stack with integrated agent and workflow components. LangChain provides agent abstractions and integrations, with separate language packages. Compare the specific packages, runtime and orchestration features you plan to adopt.

Sources (checked ): Mastra documentation; LangChain documentation

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Sources

github.com

Verified against the mastra-ai/mastra repository and the npm package.