About Strands Agents
Strands Agents is an open source toolkit for building AI agents in Python and TypeScript. It offers a ready-made agent harness as well as an SDK for building your own, plus components for sandboxing and evaluation.
What it does
The harness is a complete agent setup, available as a command-line tool or as a library you can customize. The SDK lets you build a harness from the ground up, with tools, MCP support and the model of your choice. Sandbox and evaluation components help you run agent-generated code safely and test agents before release.
Key features
- Ready-made agent harness
- SDK for custom agent loops
- Sandbox for agent-run code
- Evaluation tools before release
- Support for MCP tools
Who it's for
Developers and teams that want to build production agents on their own terms, from simple automation to research assistants. It suits anyone who wants an open toolkit rather than a single hosted product.
Pricing and good to know
The core toolkit is open source under the Apache-2.0 license. Check each component's terms before using it in production, since sandbox and hosted pieces may differ. Model costs depend on the provider you connect.
Highlights
- Ready-made agent harness
- SDK for custom agent loops
- Sandbox for agent-run code
- Evaluation tools before release
- Support for MCP tools
