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 1–4 of 4
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| Eino Go framework for LLM applications with chat-model agents, multi-agent coordination, graph workflows and human-in-the-loop resume. | Go | 13.4K | — | Not stated | Not stated | Yes |
| LangChainGo Go implementation of LangChain for writing LLM-based programs from composable building blocks. | Go | 9.7K | — | Not stated | Not stated | — |
| attestix Python toolkit for signed identities, verifiable credentials and delegated authority for AI agents, with MCP and REST interfaces. | Python, JavaScript, Go, Java | 839 | ~690 | Built in | Not stated | — |
| blades Go framework for multimodal AI agents with models, tools, memory, middleware, chains and structured output. | Go | 819 | — | Not stated | Not stated | Yes |