AAIAgentAlts

Agent frameworks and SDKs

Libraries for building agents and MCP servers or clients.

CrewAI

Agent frameworks and SDKs

Teams of role-based agents working together

Stars
★ 59.9k
Licence
MIT
Updated
  • Agent tooling
  • Official

LangGraph

Agent frameworks and SDKs

Stateful, long-running agents as graphs

Stars
★ 43.5k
Licence
MIT
Updated
  • Agent tooling
  • Official

OpenAI Agents SDK (Python)

Agent frameworks and SDKs

OpenAI's lightweight framework for multi-agent workflows

Stars
★ 30.1k
Licence
MIT
Updated
  • Agent tooling
  • Official

smolagents

Agent frameworks and SDKs

A minimal agent library where agents write code

Stars
★ 29.9k
Licence
Apache-2.0
Updated
  • Agent tooling
  • Official

Mastra

Agent frameworks and SDKs

A TypeScript framework for agents, workflows and RAG

Stars
★ 28.9k
Licence
Apache-2.0 (outside ee/)
Updated
  • Agent tooling
  • Official

FastMCP

Agent frameworks and SDKs

A high-level Python framework for MCP servers and clients

Stars
★ 28.1k
Licence
Apache-2.0
Updated
  • Agent tooling
  • Community

MCP Python SDK

Agent frameworks and SDKs

The official Python library for MCP servers and clients

Stars
★ 24.6k
Licence
MIT
Updated
  • Agent tooling
  • Official
A

Agent Development Kit (Python)

Agent frameworks and SDKs

Google's code-first toolkit for building and evaluating agents

Stars
★ 21.9k
Licence
Apache-2.0
Updated
  • Agent tooling
  • Official

Pydantic AI

Agent frameworks and SDKs

Type-safe Python agents from the Pydantic team

Stars
★ 20.7k
Licence
MIT
Updated
  • Agent tooling
  • Official

MCP TypeScript SDK

Agent frameworks and SDKs

The official TypeScript library for MCP servers and clients

Stars
★ 13.6k
Licence
Apache-2.0 / MIT (MCP licence transition)
Updated
  • Agent tooling
  • Official

Claude Agent SDK (Python)

Agent frameworks and SDKs

Build agents on the same harness as Claude Code

Stars
★ 8.3k
Licence
MIT
Updated
  • Agent tooling
  • Official