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 1–3 of 3
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| Google Agent Development Kit (ADK) Open-source toolkit for building, evaluating and deploying agents in Python, TypeScript, Go, Java and Kotlin, tuned for Gemini but model-agnostic. | Python, TypeScript, Go, Java, Kotlin | 22K | ~10.1M | Built in | Not stated | Yes |
| Koog Kotlin and Java framework for AI agents with tools, graph workflows, MCP, streaming and multiplatform targets. | Kotlin, Java | 4.6K | — | Built in | Not stated | — |
| Embabel JVM framework for agentic flows that plan toward goals, mixing LLM calls with code and domain models, usable from Kotlin or Java. | Kotlin, Java | 4.5K | — | Not stated | Not stated | — |