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Mastra

TypeScript framework for AI agents and apps with graph-based workflows, memory, suspend-and-resume approvals, MCP servers and model routing.

Harness by Mastra

IndexedOther★ 29,050
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npm install @mastra/core

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About

Mastra is a TypeScript framework for building AI agents and applications, installed with npm create mastra. Agents use LLMs and tools to work toward a goal, while a graph-based workflow engine handles multi-step processes with then, branch and parallel steps. Agents and workflows can be suspended for user input or approval and resumed from stored state. It also covers conversation history, retrieval, Observational Memory, MCP servers, evals and observability, and can run inside React, Next.js or Node apps or as a standalone server.

Use cases: agent-orchestration, workflow-automation

Reviews

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Fact sheet

Languages
TypeScriptREADME
Packages
@mastra/core (npm)README
Orchestration
graphREADME
MCP support
Built inREADME
Memory
short-term, vectormastra.ai
Human in the loop
YesREADME
Observability
built-in observabilityREADME
Deploys to
standalone-server, nextjs, nodejsREADME
Model providers
openai, anthropic, google, xaiREADME
Maturity
Stablegithub.com

Facts extracted by Claude Sonnet 5.5 from the linked sources on Oct 24, 2026; reviewed Oct 24, 2026. Wrong fact? Tell us.

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Signals

Stars
29,050
Forks
3,039
Open issues
338
Weekly downloads
1,442,185
Last commit
Oct 24, 2026 (2 days ago)
Last release
Oct 21, 2026 (5 days ago)
Last package publish
Oct 21, 2026 (5 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Packages
npm @mastra/core
License
Other
Repository
github.com/mastra-ai/mastra
Website
mastra.ai/
Docs
mastra.ai/docs
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
READMEWebsiteDocsgithub-graphql

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Cite this page

Mastra. Agent Mart. https://agentmart.dev/harnesses/mastra (last updated 2026-10-24)