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 25–48 of 117
| Name | Language | Stars | Downloads / month (approx.) | MCP | A2A | Multi-agent |
|---|---|---|---|---|---|---|
| AgentScope Python agent framework from Alibaba that lets the model drive tool use, with team pipelines, MCP, agent skills, A2A, memory and tracing. | Python | 33.8K | ~218.1K | Built in | Built in | Yes |
| PageIndex Python library that builds a tree index of long documents and has an LLM reason through it to retrieve answers, without a vector database or chunking. | Python | 39.6K | ~186.8K | Not stated | Not stated | — |
| Agently AI application runtime framework for backends with structured outputs, observable actions, MCP capabilities and recoverable workflows. | Python | 1.7K | ~2.9K | Built in | Not stated | — |
| Amazon Bedrock AgentCore SDK Python SDK for deploying agents to Amazon Bedrock AgentCore, a managed runtime with memory, gateway, tools and observability. | Python | 780 | ~6.9M | Built in | 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 | — |
| TEN Framework Open-source framework for real-time multimodal conversational AI, with RTC and WebSocket voice assistant examples. | Python | 11.2K | — | Not stated | Not stated | — |
| antigravity-sdk-python Python SDK for building agents on Google Antigravity and Gemini, with the agent loop handled by the runtime. | Python | 3.8K | ~542.2K | Not stated | Not stated | — |
| OpenAI Agents SDK Python SDK for multi-agent workflows with handoffs, guardrails, sessions and built-in tracing, usable with OpenAI and other LLMs. | Python | 30.3K | ~19.3M | Built in | Not stated | Yes |
| CAMEL Open-source Python framework for multi-agent systems: agent societies, memory, RAG, code interpreters, synthetic data and large-scale simulation. | Python | 18K | ~86.2K | Not stated | Not stated | Yes |
| AG2 Open-source Python framework for AI agents that cooperate on tasks, with human-in-the-loop workflows and multi-agent patterns. | Python | 5K | ~170.3K | Not stated | Not stated | Yes |
| 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 | — |
| nixtla Python SDK for TimeGPT, a time series foundation model for forecasting and anomaly detection. | Python | 4K | ~120.9K | Not stated | Not stated | — |
| OGX (formerly Llama Stack) OpenAI-compatible agentic API server for inference, vector stores, files and skills, on any model or infrastructure. | Python | 8.4K | ~60.7K | Built in | Not stated | — |
| judgeval Python SDK for tracing agents and scoring their traces with prompt-based judges, to find failures in production. | Python | 1.1K | ~332.9K | Not stated | Not stated | — |
| fast-agent CLI-first Python agent framework and coding agent with MCP, A2A and Agent Skills support, live streaming and human input. | Python | 3.9K | ~83.5K | Built in | Built in | Yes |
| 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 | — |
| 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 | — |
| python-utcp Official Python implementation of the Universal Tool Calling Protocol, calling HTTP, CLI, MCP and text-file tools through plugins. | Python | 653 | ~8.1K | Via adapter | 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 |
| Griptape Python framework for generative AI agents, pipelines and parallel workflows, with RAG engines, tools, memory and swappable drivers. | Python | 2.6K | ~46K | Built in | Not stated | Yes |
| txtai All-in-one Python AI framework for embeddings-based semantic search, LLM pipelines, workflows and agents. | Python | 13K | ~14.3K | Built in | Not stated | Yes |
| kagent Kubernetes-native framework and runtime for building and running AI agents as Kubernetes custom resources. | Go, Python | 4.1K | — | Built in | Built in | Yes |