Voltagent

What is Voltagent

VoltAgent is an open-source TypeScript framework designed for constructing and managing AI agents. It provides foundational elements needed to develop applications powered by autonomous agents, which can interpret their environment, make decisions, and take actions to achieve objectives. VoltAgent simplifies the complexities of building such agents by supplying standardized patterns and modular building blocks, allowing developers to focus on defining agent behaviors rather than the underlying intricate details.

Use cases

VoltAgent can be utilized in various AI-driven applications including complex workflow automation, AI-powered dashboards, intelligent data pipelines, and automated customer support agents. It enables the creation of sophisticated chatbots that leverage memory and tools, agents that seamlessly fetch and process data, as well as systems employing Retrieval-Augmented Generation (RAG). The framework is adaptable for many scenarios, including voice-controlled applications and personalized user experiences.

How to use

To start a new VoltAgent project, use the CLI tool with the command npm create voltagent-app@latest, which sets up the initial project structure. Developers can define agents by creating instances of the Agent class, specifying details like names, instructions, and the underlying AI model. After configuring the agents, run npm run dev to initiate the VoltAgent server, allowing interaction with the agents via the VoltOps LLM Observability Platform.

Key features

VoltAgent comes packed with key features including core agent definitions, multi-agent systems controlled by Supervisors, extensible packages for added functionality, and seamless integration with various LLM providers. It also offers memory management for contextual interactions, observability tools for performance monitoring, support for custom API endpoints, and facilities for voice interaction. These features contribute to efficient building and management of AI applications.

Where to use

VoltAgent is suitable for use in environments requiring autonomous decision-making and actions, such as enterprise automation systems, customer service solutions, and interactive personal assistants. It can effectively power internal tools, enhance application workflows, and serve in educational platforms that require intelligent interactions. Organizations looking to integrate AI capabilities into products or workflows can leverage VoltAgent for both simple and complex scenarios.

English | 繁體中文 | 简体中文 | 日本語 | 한국어

Home Page | Documentation | Examples | Discord | Blog

What is VoltAgent?

An AI Agent Framework provides the foundational structure and tools needed to build applications powered by autonomous agents. These agents, often driven by Large Language Models (LLMs), can perceive their environment, make decisions, and take actions to achieve specific goals. Building such agents from scratch involves managing complex interactions with LLMs, handling state, connecting to external tools and data, and orchestrating workflows.

VoltAgent is an open-source TypeScript framework that acts as this essential toolkit. It simplifies the development of AI agent applications by providing modular building blocks, standardized patterns, and abstractions. Whether you’re creating chatbots, virtual assistants, automated workflows, or complex multi-agent systems, VoltAgent handles the underlying complexity, allowing you to focus on defining your agents’ capabilities and logic.

Instead of building everything from scratch, VoltAgent provides ready-made, modular building blocks:

• Core Engine (@voltagent/core): The heart of VoltAgent, providing fundamental capabilities for your AI agents Define individual agents with specific roles, tools, and memory.
• Multi-Agent Systems: Architect complex applications by coordinating multiple specialized agents using Supervisors.
• Extensible Packages: Enhance functionality with packages like @voltagent/voice for voice interactions.
• Tooling & Integrations: Equip agents with tools to connect to external APIs, databases, and services, enabling them to perform real-world tasks. Supports the Model Context Protocol (MCP) for standardized tool interactions.
• Data Retrieval & RAG: Implement specialized retriever agents for efficient information fetching and Retrieval-Augmented Generation (RAG).
• Memory: Enable agents to remember past interactions for more natural and context-aware conversations.
• LLM Compatibility: Works with popular AI models from OpenAI, Google, Anthropic, and more, allowing easy switching.
• Developer Ecosystem: Includes helpers like create-voltagent-app, @voltagent/cli, and the visual VoltOps LLM Observability Platform for quick setup, monitoring, and debugging.

In essence, VoltAgent helps developers build sophisticated AI applications faster and more reliably, avoiding repetitive setup and the limitations of simpler tools.

Why VoltAgent?

Building AI applications often involves a trade-off:

1. DIY Approach: Using basic AI provider tools offers control but leads to complex, hard-to-manage code and repeated effort.
2. No-Code Builders: Simpler initially but often restrictive, limiting customization, provider choice, and complexity.

VoltAgent provides a middle ground, offering structure and components without sacrificing flexibility:

• Build Faster: Accelerate development with pre-built components compared to starting from scratch.
• Maintainable Code: Encourages organization for easier updates and debugging.
• Scalability: Start simple and easily scale to complex, multi-agent systems handling intricate workflows.
• Flexibility: Full control over agent behavior, LLM choice, tool integrations, and UI connections.
• Avoid Lock-in: Freedom to switch AI providers and models as needed.
• Cost Efficiency: Features designed to optimize AI service usage and reduce redundant calls.
• Visual Monitoring: Use the VoltOps LLM Observability Platform to track agent performance, inspect state, and debug visually.

VoltAgent empowers developers to build their envisioned AI applications efficiently, from simple helpers to complex systems.

⚡ Quick Start

Create a new VoltAgent project in seconds using the create-voltagent-app CLI tool:

npm create voltagent-app@latest

This command guides you through setup.

You’ll see the starter code in src/index.ts to get you started with the VoltAgent framework.

import { VoltAgent, Agent } from "@voltagent/core";
import { VercelAIProvider } from "@voltagent/vercel-ai"; // Example provider
import { openai } from "@ai-sdk/openai"; // Example model

// Define a simple agent
const agent = new Agent({
  name: "my-agent",
  instructions: "A helpful assistant that answers questions without using tools",
  // Note: You can swap VercelAIProvider and openai with other supported providers/models
  llm: new VercelAIProvider(),
  model: openai("gpt-4o-mini"),
});

// Initialize VoltAgent with your agent(s)
new VoltAgent({
  agents: {
    agent,
  },
});

Afterwards, navigate to your project and run:

npm run dev

When you run the dev command, tsx will compile and run your code. You should see the VoltAgent server startup message in your terminal:

══════════════════════════════════════════════════
VOLTAGENT SERVER STARTED SUCCESSFULLY
══════════════════════════════════════════════════
✓ HTTP Server: http://localhost:3141

VoltOps Platform: https://console.voltagent.dev
══════════════════════════════════════════════════

Your agent is now running! To interact with it:

1. Open the Console: Click the VoltOps LLM Observability Platform link in your terminal output (or copy-paste it into your browser).
2. Find Your Agent: On the VoltOps LLM Observability Platform page, you should see your agent listed (e.g., “my-agent”).
3. Open Agent Details: Click on your agent’s name.
4. Start Chatting: On the agent detail page, click the chat icon in the bottom right corner to open the chat window.
5. Send a Message: Type a message like “Hello” and press Enter.

Key Features

• Agent Core: Define agents with descriptions, LLM providers, tools, and memory management.
• Multi-Agent Systems: Build complex workflows using Supervisor Agents coordinating multiple specialized Sub-Agents.
• Tool Usage & Lifecycle: Equip agents with custom or pre-built tools (functions) with type-safety (Zod), lifecycle hooks, and cancellation support to interact with external systems.
• Flexible LLM Support: Integrate seamlessly with various LLM providers (OpenAI, Anthropic, Google, etc.) and easily switch between models.
• Memory Management: Enable agents to retain context across interactions using different configurable memory providers.
• Observability & Debugging: Visually monitor agent states, interactions, logs, and performance via the VoltOps LLM Observability Platform.
• Custom API Endpoints: Extend the VoltAgent API server with your own custom endpoints to build specialized functionality on top of the core framework.
• Voice Interaction: Build voice-enabled agents capable of speech recognition and synthesis using the @voltagent/voice package.
• Data Retrieval & RAG: Integrate specialized retriever agents for efficient information fetching and Retrieval-Augmented Generation (RAG) from various sources.
• Model Context Protocol (MCP) Support: Connect to external tool servers (HTTP/stdio) adhering to the MCP standard for extended capabilities.
• Prompt Engineering Tools: Leverage utilities like createPrompt for crafting and managing effective prompts for your agents.
• Framework Compatibility: Designed for easy integration into existing Node.js applications and popular frameworks.

Use Cases

VoltAgent is versatile and can power a wide range of AI-driven applications:

• Complex Workflow Automation: Orchestrate multi-step processes involving various tools, APIs, and decision points using coordinated agents.
• Intelligent Data Pipelines: Build agents that fetch, process, analyze, and transform data from diverse sources.
• AI-Powered Internal Tools & Dashboards: Create interactive internal applications that leverage AI for analysis, reporting, or task automation, often integrated with UIs using hooks.
• Automated Customer Support Agents: Develop sophisticated chatbots that can understand context (memory), use tools (e.g., check order status), and escalate complex issues.
• Repository Analysis & Codebase Automation: Analyze code repositories, automate refactoring tasks, generate documentation, or manage CI/CD processes.
• Retrieval-Augmented Generation (RAG) Systems: Build agents that retrieve relevant information from knowledge bases (using retriever agents) before generating informed responses.
• Voice-Controlled Interfaces & Applications: Utilize the @voltagent/voice package to create applications that respond to and generate spoken language.
• Personalized User Experiences: Develop agents that adapt responses and actions based on user history and preferences stored in memory.
• Real-time Monitoring & Alerting: Design agents that continuously monitor data streams or systems and trigger actions or notifications based on defined conditions.
• And Virtually Anything Else…: If you can imagine an AI agent doing it, VoltAgent can likely help you build it! ⚡

Learning VoltAgent

• Documentation: Dive into guides, concepts, and tutorials.
• Examples: Explore practical implementations.
• Blog: Read more about technical insights, and best practices.

Contribution

We welcome contributions! Please refer to the contribution guidelines (link needed if available). Join our Discord server for questions and discussions.

Contributor ♥️ Thanks

Big thanks to everyone who’s been part of the VoltAgent journey, whether you’ve built a plugin, opened an issue, dropped a pull request, or just helped someone out on Discord or GitHub Discussions.

VoltAgent is a community effort, and it keeps getting better because of people like you.

Your stars help us reach more developers! If you find VoltAgent useful, please consider giving us a star on GitHub to support the project and help others discover it.

License

Licensed under the MIT License, Copyright © 2025-present VoltAgent.