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 1–19 of 19
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| Strands Agents Open-source Python and TypeScript SDK for model-driven agents, with tools, MCP, multi-agent patterns and streaming. | Python, TypeScript | 8.9K | ~38.1M | Built in | Not stated | Yes |
| trueforge Open-source agent harness that runs the model loop for you, with MCP tools, skills, sandboxing, approvals and a chat UI. | TypeScript | 6.4K | — | Built in | Not stated | Yes |
| ADK for TypeScript TypeScript toolkit for agents with Zod-typed tools, graph and multi-agent workflows, and Node.js or browser runtimes. | TypeScript | 1.4K | ~615.1K | Built in | Built in | Yes |
| Ax DSPy-style toolkit for typed LLM signatures, agents and flows, TypeScript-first with Python, Java, C++, Go and Rust libraries. | TypeScript, Python, Java, c++, Go, Rust | 3K | ~116.4K | Not stated | Not stated | Yes |
| BeeAI Framework Python and TypeScript framework for multi-agent systems, with MCP and A2A interop, YAML orchestration and OpenTelemetry tracing. | Python, TypeScript | 3.4K | ~23.3K | Built in | Built in | Yes |
| Deep Agents Opinionated agent harness on LangGraph with sub-agents, filesystem access, context management, persistent memory and approval of tool calls. | Python, TypeScript | 30.6K | ~8.3M | Built in | Not stated | Yes |
| 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 |
| Agent Squad Open-source framework that routes each user query to one of several AI agents, with Python, TypeScript and Swift runtimes. | Python, TypeScript, swift | 7.8K | ~6.5K | Built in | Not stated | Yes |
| VoltAgent TypeScript framework for AI agents with tools, memory, RAG, MCP and sub-agents, paired with a Cloud or self-hosted console. | TypeScript | 10.9K | — | Built in | Not stated | Yes |
| Cloudflare Agents SDK TypeScript SDK for persistent AI agents on Cloudflare Durable Objects, with state sync, scheduling and MCP support. | TypeScript | 5.9K | — | Built in | Not stated | Yes |
| OpenAI Agents SDK (JavaScript) TypeScript and JavaScript framework for multi-agent workflows with tools, handoffs, guardrails, sandboxes and voice agents. | TypeScript, JavaScript | 3.9K | ~5.1M | Built in | Not stated | Yes |
| agent-governance-toolkit Policy enforcement, identity, sandboxing and reliability tooling for autonomous AI agents, installable with one pip command. | Python, TypeScript, C# | 6.5K | ~121.3K | Not stated | Not stated | Yes |
| agentos TypeScript agent framework with persistent cognitive memory, multi-agent orchestration and one dispatch interface across 13 LLM providers. | TypeScript | 681 | ~56.2K | Not stated | Not stated | Yes |
| OpenHands Software Agent SDK Python and TypeScript SDK and REST Agent Server for building agents that work with code in local or containerized workspaces. | Python, TypeScript | 1.3K | ~3.8M | Not stated | Not stated | Yes |
| open-multi-agent Self-hosted TypeScript runtime for coordinating agents with human approval gates and inspectable runs, with no telemetry. | TypeScript | 7K | ~3.8K | Not stated | Not stated | Yes |
| Stately Agent XState library where agent logic is a state machine, so a model can only pick events the machine allows. | TypeScript | 484 | — | Not stated | Not stated | Yes |
| dexto Open agent harness for AI applications, with a YAML-configured coding agent, sessions, tools, MCP support and a CLI. | TypeScript | 657 | — | Built in | Not stated | Yes |
| Bindu Python platform that gives agents a cryptographic identity, A2A communication and x402 payment requirements behind one bindufy() call. | Python, TypeScript, Kotlin | 10K | ~446 | Not stated | Built in | Yes |
| Inngest AgentKit Framework for AI agents and multi-agent networks where a router picks which agent runs, with tools and MCP support. | TypeScript | 956 | ~52K | Built in | Not stated | Yes |