Harnesses & SDKs

Model-agnostic SDK for building agents and multi-agent systems in Python, .NET and Java; Microsoft names Agent Framework as its successor.

Python library for autonomous agents that run scheduled tasks and exchange messages on the Fetch.ai network.

Python framework for multi-agent applications where agents with defined roles talk through explicit flows, built on the OpenAI Agents SDK.

Elixir framework for autonomous agents with state, actions, signals and directives, running on OTP supervision.

Open infrastructure for discovering, evaluating, creating and routing reusable AI agent skills, with a Python SDK.

Python framework for real-time voice and vision agents that process video with pluggable models and processors over WebRTC.

PHP library for generative AI and vector databases, compatible with Symfony and Laravel, with typed classification.

The batteries included agent harness.

Open-source platform for voice agents that place and answer phone calls through Twilio or Plivo with pluggable speech and LLM providers.

Open framework for building and hosting production-grade AI agents and multi-agent workflows in .NET and Python.

Python framework for agents that discover MCP tools by themselves, with optional memory, guardrails, cache and tracing.

Python runtime and framework for long-running agents, with durable sessions, approvals, spend caps and multi-agent collaboration.

Python and TypeScript SDK that lets an agent message people on email, Slack, Discord, Telegram and other channels through one handler.

Python toolkit for Vietnamese NLP with a multi-provider agent module that calls LLM APIs using only the standard library.

Code-first Java toolkit for building and testing AI agents, with multi-agent hierarchies, a dev UI and Maven packages.

Python interface for running and evaluating agents from several frameworks, with OpenTelemetry traces; now in soft deprecation.

SDK for building Microsoft Teams apps and AI agents in TypeScript, C# and Python, with a CLI that scaffolds new agents.

Library for LLM post-training (SFT, DPO, GRPO and agentic RL) and classic RL, with evolutionary hyperparameter optimization.

Open-source online code execution system that runs submitted code in a sandbox behind an HTTP JSON API.

Python SDK for building agents on Volcengine AgentKit, with a bundled Web UI, Studio deployment and short- and long-term memory.

Reinforcement learning framework for training reasoning LLM agents over multi-turn episodes with the StarPO algorithm.

Open-source infrastructure for continually self-improving agents that serves requests, learns from feedback and versions updates.

YAML-driven Python robot simulator for navigation, control and learning research, with collision detection and a Matplotlib renderer.

Lightweight Python agent framework for long-running tasks, with skills, sub-agents, A2A and ACP servers, and CLI, TUI and web front ends.