175 listed
Harnesses & SDKs
Frameworks and SDKs for building agents: the Claude Agent SDK, OpenAI Agents SDK, LangGraph, CrewAI and many more. Each page lists languages, packages, MCP and A2A support and how it orchestrates agents, with a link to the page every fact came from.
Showing 169–175 of 175
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| blades Go framework for multimodal AI agents with models, tools, memory, middleware, chains and structured output. | Go | 819 | — | Not stated | Not stated | Yes |
| MetaGPT Python multi-agent framework that gives LLM agents software-company roles and SOPs to turn a one-line requirement into a project repository. | Python | 71K | ~2.7K | Not stated | Not stated | Yes |
| workflow Workflow SDK: Build durable, reliable, and observable apps and AI Agents in TypeScript | TypeScript | 2.5K | — | Not stated | Not stated | — |
| Lagent Lightweight Python framework for LLM agents built as PyTorch-style layers, with agent memory kept as session state. | Python | 2.3K | ~1.5K | Not stated | Not stated | Yes |
| Semantic Kernel for Java Java SDK for calling LLMs such as OpenAI, Azure OpenAI and Hugging Face, with plugins that chain functions and planners. | Java | 276 | — | Not stated | Not stated | — |
| Youtu-Agent Framework for building, running and evaluating autonomous agents, with a planner-based multi-agent mode, skills and agent RL training. | Python | 4.6K | ~99 | Not stated | Not stated | Yes |
| Azure AI Foundry Agents SDK Managed Microsoft Foundry service for building, deploying and scaling AI agents, with a Python client library on PyPI. | Python | — | ~4.7M | Built in | Not stated | — |