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 1–15 of 15
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| Genkit Open-source Firebase framework for AI features and agent workflows in JavaScript, Go, Python and Dart, with model plugins. | TypeScript, JavaScript, Go, Python, dart | 6.5K | ~410.6K | Not stated | Not stated | — |
| PraisonAI Python framework for multi-agent teams and workflows, with a CLI and Docker, MCP and A2A deployment options. | Python, JavaScript | 9.3K | ~19.8K | Built in | Built in | Yes |
| LiveKit Agents Framework for Python or Node.js programs that join LiveKit rooms as realtime voice and video agents. | Python, JavaScript | 14.9K | ~4.1M | Built in | Not stated | — |
| LangChain.js JavaScript and TypeScript framework of interoperable components for building LLM apps and agents, with LangGraph.js and Deep Agents above it. | TypeScript, JavaScript | 18.3K | — | Not stated | Not stated | — |
| trigger.dev TypeScript platform to build and deploy long-running AI agents and workflows with retries, queues and human approval steps. | TypeScript, JavaScript | 16.6K | — | Not stated | Not stated | — |
| docx-editor Browser DOCX editor and document engine built on OOXML, with a Document API that agents reach through SDKs, a CLI and an MCP server. | JavaScript, Python | 1.1K | — | Via adapter | Not stated | — |
| Coinbase AgentKit Coinbase toolkit that gives AI agents a crypto wallet and onchain actions, framework- and wallet-agnostic. | JavaScript, Python | 1.3K | ~7.9K | Not stated | Not stated | — |
| notte Browser infrastructure for AI agents: local and cloud Playwright-based browser sessions, scraping and deployable browser functions. | Python, JavaScript, TypeScript | 2K | ~2.6K | Via adapter | Not stated | — |
| metorial Open-source access layer that connects AI agents to 1200+ integrations with shared auth, permissions and audit logs. | TypeScript, JavaScript, Python | 3.4K | ~1K | Built in | Not stated | — |
| LiveKit Agents (Node.js) Node.js distribution of the LiveKit Agents framework for realtime voice agents in LiveKit rooms. | JavaScript | 949 | ~2.3M | Built in | 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 | — |
| lix Embeddable version control system for files and SQL tables, with branch, diff, merge and rollback across both. | JavaScript, Rust | 771 | ~2.4M | Not stated | Not stated | — |
| 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 |
| KaibanJS JavaScript framework for multi-agent teams whose tasks move across a Kanban-style board you can watch. | JavaScript | 1.5K | — | Not stated | Not stated | Yes |
| 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 | — |