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 25–47 of 47
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| samples Sample projects for the Strands Agents SDK, showing how to build agents in Python and TypeScript; not intended for production use. | Python, TypeScript | 913 | ~38.1M | Not stated | Not stated | — |
| 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 |
| elizaOS TypeScript framework and product stack for autonomous agents, with a plugin system, persistent memory, a CLI, an app and cloud services. | TypeScript | 19.6K | ~18.8K | Not stated | Not stated | — |
| Stirrup Lightweight Python framework and starting template for agents that let the model choose its own approach to each task. | Python, TypeScript | 667 | ~279.7K | Built in | Not stated | — |
| chidori TypeScript agent framework on a Rust runtime, where runs are checkpointed, replayed with zero LLM calls and resumed after a crash. | TypeScript, Python | 1.4K | ~266 | Not stated | Not stated | — |
| 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 |
| standards-sdk TypeScript SDK with reference implementations of Hashgraph Consensus Standards and a Registry Broker client. | TypeScript | 1.3K | ~171 | Not stated | Not stated | — |
| Patter Python and TypeScript SDK that gives an AI agent a phone number, with pluggable LLM, speech and telephony providers. | Python, TypeScript | 1.1K | ~167 | Not stated | Not stated | — |
| flint-chart Visualization language and MCP server that lets AI agents create charts from editable chart specs. | TypeScript | 4.4K | — | Via adapter | Not stated | — |
| Mirascope Python and TypeScript toolkit for calling any frontier LLM through one interface, with tools, structured output and tracing. | Python, TypeScript | 1.5K | ~25K | Not stated | Not stated | — |
| 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 |
| Deep Agents (JavaScript) The batteries included agent harness. | TypeScript | 1.6K | — | Not stated | Not stated | — |
| caspian-sdk Python and TypeScript SDK that lets an agent message people on email, Slack, Discord, Telegram and other channels through one handler. | Python, TypeScript | 973 | ~244 | Not stated | Not stated | — |
| Microsoft Teams SDK SDK for building Microsoft Teams apps and AI agents in TypeScript, C# and Python, with a CLI that scaffolds new agents. | TypeScript, C#, Python | 731 | ~2.1M | Not stated | Not stated | — |
| code-mode TypeScript library that lets agents call MCP and UTCP tools by running model-written code in a sandbox. | TypeScript | 1.6K | — | Built in | Not stated | — |
| 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 |
| workflow Workflow SDK: Build durable, reliable, and observable apps and AI Agents in TypeScript | TypeScript | 2.5K | — | Not stated | Not stated | — |