Strands Harness SDK is an open-source library for building and running AI agents in Python and TypeScript.
Follow Strands Harness SDK to get an email when its listing changes, such as new pricing or features. One digest a day at most, and you can unsubscribe anytime.
It provides a modular, in-process framework for constructing agent loops, offering full control over tools, memory, sessions, and observability without a hosted control plane.
- 01
Model-agnostic provider support including Bedrock, Anthropic, OpenAI, Google, and Ollama
- 02
Support for MCP (Model Context Protocol) and multi-agent patterns like swarms
- 03
Built-in observability, tracing, and lifecycle hooks
- 04
Stateful session management with persistent memory
- 05
Customizable agent loops with structured output and token budget controls
Open Source
The project is licensed under the Apache 2.0 license and is free to use.
Best for
Developers who need a modular, customizable, and model-agnostic foundation to build production-grade AI agents from the ground up.
Not ideal for
Users seeking a low-code or no-code platform with a managed, hosted infrastructure control plane.
A robust, developer-first toolkit that successfully balances the flexibility of a low-level SDK with the practical convenience of the pre-assembled Strands harness for production deployments.
Version 1.62.0, released October 21, 2026, introduced experimental bidirectional streaming for OpenAI Live, new Python middleware hooks, and added swarm tools to both Python and TypeScript.
As of
Is Strands Harness SDK free?+
Yes - Strands Harness SDK is Open Source. The project is licensed under the Apache 2.0 license and is free to use.
Is Strands Harness SDK open source?+
Yes - Strands Harness SDK is open source. The project is licensed under the Apache 2.0 license and is free to use.
Who is Strands Harness SDK best for?+
Developers who need a modular, customizable, and model-agnostic foundation to build production-grade AI agents from the ground up.
Who is Strands Harness SDK not ideal for?+
Users seeking a low-code or no-code platform with a managed, hosted infrastructure control plane.
What are the best Strands Harness SDK alternatives?+
The closest Strands Harness SDK alternatives on ai.dosa.dev are Jules by Google, OpenHands, SWE-agent - all listed under Autonomous & Async Agents.
Who makes Strands Harness SDK?+
Strands Harness SDK is developed by Strands Agents. It is listed in the Autonomous & Async Agents category on ai.dosa.dev.
Favorite this tool to revisit it later, or Zap it to contribute to the public vote count.