Strands Agents

A model-driven approach to building AI agents in just a few lines of code.

Documentation ◆ Samples ◆ Tools ◆ Agent Builder ◆ MCP Server

Strands Agents is a simple yet powerful SDK that takes a model-driven approach to building and running AI agents. From simple conversational assistants to complex autonomous workflows, from local development to production deployment, Strands Agents scales with your needs. This monorepo contains the Python SDK, TypeScript SDK, documentation site, and supporting packages: | Directory | Description | |-----------|-------------| | `strands-py/` | Python SDK: agent loop, model providers, tools ([PyPI](https://pypi.org/project/strands-agents/) · [releases](https://github.com/strands-agents/harness-sdk/releases?q=python%2F&expanded=false)) | | `strands-ts/` | TypeScript SDK: agent loop, model providers, tools ([npm](https://www.npmjs.com/package/@strands-agents/sdk) · [releases](https://github.com/strands-agents/harness-sdk/releases?q=typescript%2F&expanded=false)) | | `strandly/` | Developer CLI for local builds and workspace tooling | | `site/` | Source for the [strandsagents.com](https://strandsagents.com) documentation site (Astro/Starlight) | | `team/` | Governance and cross-SDK process docs (tenets, decisions, PR & compatibility guidelines, and `designs/` proposals) | ## Why Strands Build an agent harness. Control it end-to-end. - **Build your way.** Any model, any cloud. Context management, execution limits, and observability built in before you write a line of config. Swap backends when you scale; your code stays the same. - **Model agnostic.** First-class support for Amazon Bedrock, Anthropic, OpenAI, and Gemini, plus [many more providers](https://strandsagents.com/docs/user-guide/concepts/model-providers/) and custom ones. - **Stay in control.** The agent loop traces every decision by default. Hooks let you intercept any step to log it, validate it, or redirect it. - **Deliver outcomes that work.** Guardrails catch mistakes before they run. Steering handlers let agents correct themselves instead of failing silently. MCP, streaming, multi-agent patterns, and structured output are all built in. ## Quick Start Both SDKs default to the Amazon Bedrock model provider, so you'll need AWS credentials configured and model access enabled for Claude Sonnet. The [Quickstart Guide](https://strandsagents.com/docs/user-guide/quickstart/overview/) covers configuring other providers (Anthropic, OpenAI, Gemini, Ollama, and more). ### Python Requires Python 3.10+: ```bash pip install strands-agents strands-agents-tools ``` ```python from strands import Agent from strands_tools import calculator agent = Agent(tools=[calculator]) agent("What is the square root of 1764") ``` The [Python SDK README](strands-py/) covers tools, model providers, MCP, and bidirectional streaming. ### TypeScript Requires Node.js 20+: ```bash npm install @strands-agents/sdk ``` ```typescript import { Agent } from '@strands-agents/sdk' const agent = new Agent() const result = await agent.invoke('What is the square root of 1764?') console.log(result) ``` More in the [TypeScript SDK README](strands-ts/), including Zod-typed tools, structured output, and multi-agent patterns. ## Documentation For detailed guidance & examples, explore our documentation: - [User Guide](https://strandsagents.com/) - [Quick Start Guide](https://strandsagents.com/docs/user-guide/quickstart/overview/) - [Agent Loop](https://strandsagents.com/docs/user-guide/concepts/agents/agent-loop/) - [Examples](https://strandsagents.com/docs/examples/) - API Reference: [Python](https://strandsagents.com/docs/api/python/strands.agent.agent/) · [TypeScript](https://strandsagents.com/docs/api/typescript/) - [Production & Deployment Guide](https://strandsagents.com/docs/user-guide/deploy/operating-agents-in-production/) The docs themselves live in this monorepo under [`site/`](site/), and doc PRs are welcome alongside code changes. ## Development Git operations (commits, branches, PRs) are done from the repo root. Each package has its own toolchain: **Python SDK** (`strands-py/`): ```bash cd strands-py pip install hatch hatch test # run unit tests hatch fmt # format & lint ``` **TypeScript SDK** (`strands-ts/`): ```bash npm ci # install from repo root npm run build # build npm test # run unit tests ``` **Documentation site** (`site/`): ```bash cd site npm install npm run dev # local dev server at http://localhost:4321/ ``` ## Contributing ❤️ We welcome contributions! See our [Contributing Guide](CONTRIBUTING.md) for details on: - Reporting bugs & features - Development setup - Contributing via Pull Requests - Code of Conduct - Reporting of security issues ## Stay in touch with the team Come meet the Strands team and other users on [**Discord**](https://discord.com/invite/strands) ## License This project is licensed under the Apache License 2.0 - see the [LICENSE.APACHE](LICENSE.APACHE) file for details. ## Security See [CONTRIBUTING](CONTRIBUTING.md#security-issue-notifications) for more information.