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 145–157 of 157
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| Qwen-Agent Python framework for LLM applications built on Qwen models, with function calling, MCP, a code interpreter and RAG options. | Python | 17.2K | ~90K | Built in | Not stated | — |
| AgentScope Runtime Python runtime for agent apps with tool sandboxing and streaming agent APIs; archived, with features moved to AgentScope 2.0. | Python | 878 | ~11.8K | Not stated | Not stated | — |
| Microsoft 365 Agents SDK SDK for building agents in C#, JavaScript and Python that run on channels such as Microsoft Teams and Microsoft 365 Copilot. | C#, JavaScript, Python | 1.1K | ~1.1M | Not stated | Not stated | — |
| Upsonic Python framework for autonomous agents that work in a sandboxed workspace, and task agents with tools and MCP support. | Python | 8K | ~1K | Built in | Not stated | Yes |
| Adala Python framework for data labeling agents that learn skills from a ground-truth dataset through iterative feedback. | Python | 1.6K | ~56 | Not stated | Not stated | — |
| mcp-agent Python framework for MCP-based agents with composable workflow patterns, MCP server creation and Temporal-backed durable execution. | Python | 8.6K | ~65.2K | Built in | Not stated | Yes |
| OpenAI Swarm Experimental Python library that teaches agent handoffs on the Chat Completions API; OpenAI now points users to its Agents SDK. | Python | 22.1K | — | Not stated | Not stated | Yes |
| 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 | — |
| 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 | — |