Harnesses & SDKs

Python agent runtime with an SDK for building your own agent, and an app that adds plugins and channel integrations.

TypeScript agent framework with persistent cognitive memory, multi-agent orchestration and one dispatch interface across 13 LLM providers.

Java library for stateful, multi-agent LLM applications built as cyclical graphs, designed to work with langchain4j and Spring AI.

Python and TypeScript SDK and REST Agent Server for building agents that work with code in local or containerized workspaces.

Ruby library for LLM-powered apps with a unified LLM interface, prompt tools, output parsers, RAG and assistants.

Go framework for multi-agent systems with graph workflows, tools, session memory, MCP, A2A, AG-UI and OpenTelemetry.

Python framework for LLM agents that run as durable Dapr workflows, with retries, Kubernetes deployment and human-in-the-loop hooks.

Archived Microsoft Python framework for multi-agent apps; Microsoft directs new users to Microsoft Agent Framework.

Gym-style Python environment for building and evaluating web agents on MiniWoB, WebArena, WorkArena and other benchmarks.

Self-hosted TypeScript runtime for coordinating agents with human approval gates and inspectable runs, with no telemetry.

PHP framework for agentic applications with workflows, human-in-the-loop, MCP connectors, RAG and multi-provider LLM support.

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.

Open-source LLM function calling framework for AI agents, with serverless LLM tools and geo-distributed infrastructure.

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.