@mastra/core

Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

It includes everything you need to go from early prototypes to production-ready applications. Mastra integrates with frontend and backend frameworks like React, Next.js, and Node, or you can deploy it anywhere as a standalone server. It's the easiest way to build, tune, and scale reliable AI products.

This is the @mastra/core package, which includes the main functionality of Mastra, including agents, workflows, tools, and memory.

Installation

@mastra/core is an essential building block for a Mastra application and you most likely don't want to use it as a standalone package. Therefore we recommend following the installation guide to get started with Mastra.

You can install the package like so:

npm install @mastra/core

Core Components

• Mastra (/mastra) - Central orchestration class that initializes and coordinates all Mastra components. Provides dependency injection for agents, workflows, tools, memory, storage, and other services through a unified configuration interface. Learn more about Mastra

• Agents (/agent) - Autonomous AI entities that understand instructions, use tools, and complete tasks. Encapsulate LLM interactions with conversation history, tool execution, memory integration, and behavioral guidelines. Learn more about Agents

• Workflows (/workflows) - Graph-based execution engine for chaining, branching, and parallelizing LLM calls. Orchestrates complex AI tasks with state management, error recovery, and conditional logic. Learn more about Workflows

• Tools (/tools) - Functions that agents can invoke to interact with external systems. Each tool has a schema and description enabling AI to understand and use them effectively. Supports custom tools, toolsets, and runtime context. Learn more about Tools

• Memory (/memory) - Thread-based conversation persistence with semantic recall and working memory capabilities. Stores conversation history, retrieves contextually relevant information, and maintains agent state across interactions. Learn more about Memory

• MCP (/mcp) - Model Context Protocol integration enabling external tool sources. Supports SSE, HTTP, and Hono-based MCP servers with automatic tool conversion and registration. Learn more about MCP

• Observability - Type-safe observability system tracking AI operations through spans. Provides flexible tracing with event-driven exports, configurable sampling, and pluggable processors and exporters for real-time monitoring. Full observability features are available in the @mastra/observability package. Learn more about Observability

• Storage (/storage) - Pluggable storage layer with standardized interfaces for multiple backends. Supports PostgreSQL, LibSQL, MongoDB, and other databases for persisting agent data, memory, and workflow state. Learn more about Storage

• Vector (/vector) - Vector operations and embedding management for semantic search. Provides unified interface for vector stores with filtering capabilities and similarity search. Learn more about Vector

• Server (/server) - HTTP server implementation built on Hono with OpenAPI support. Provides custom API routes, middleware, authentication, and runtime context for deploying Mastra as a standalone service. Learn more about Server

• Voice (/voice) - Voice interaction capabilities with text-to-speech and speech-to-text integration. Supports multiple voice providers and real-time voice communication for agents. Learn more about Voice

Additional Resources

• Getting Started Guide
• API Reference
• Examples
• Deployment Guide