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The directory of AI agent tools

93 hand-checked agent frameworks, MCP servers, coding agents, agent apps and infrastructure, each linked to its official site.

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Agent Frameworks

Libraries and SDKs for building AI agents and multi-agent systems.

LangGraph

Low-level orchestration framework from LangChain for building stateful, multi-step agents as graphs, with persistence and human-in-the-loop support.

Open source (MIT)

LangChain

Popular framework for building LLM applications and agents with composable chains, tools, retrievers and integrations.

Open source (MIT)

CrewAI

Python framework for orchestrating role-playing, collaborative multi-agent "crews" with tasks and processes.

Open source + paid platform

AutoGen

Microsoft's open-source framework for building multi-agent conversational applications.

Open source

OpenAI Agents SDK

Lightweight OpenAI SDK for multi-agent workflows with handoffs, guardrails and tracing.

Open source (MIT)

LlamaIndex

Data framework for connecting LLMs to your data, with agent and workflow abstractions for RAG-heavy agents.

Open source + paid cloud

Semantic Kernel

Microsoft SDK for integrating LLMs into apps with plugins, planners and agent abstractions.

Open source (MIT)

Pydantic AI

Agent framework from the Pydantic team focused on type-safe, structured outputs and dependency injection.

Open source (MIT)

smolagents

Hugging Face's minimal library for agents that think and act in code.

Open source (Apache-2.0)

Mastra

TypeScript agent framework with workflows, memory, RAG, evals and integrations.

Open source

Vercel AI SDK

TypeScript toolkit for building AI apps and agents with streaming, tool calling and multi-provider support.

Open source

Agno

Python framework (formerly Phidata) for building multi-modal agents with memory, knowledge and tools.

Open source + paid platform

Haystack

deepset's open-source framework for production RAG pipelines and agents.

Open source (Apache-2.0)

Google Agent Development Kit

Google's open-source toolkit for building, evaluating and deploying agents, optimized for Gemini.

Open source (Apache-2.0)

DSPy

Stanford framework for programming—rather than prompting—language models, with optimizers for prompts and weights.

Open source (MIT)

CAMEL

Open-source multi-agent framework and research community studying agent societies.

Open source

Letta

Framework (from the MemGPT team) for stateful agents with long-term memory.

Open source + paid cloud

Claude Agent SDK

Anthropic's SDK for building agents on the same harness that powers Claude Code.

Open source

MCP Servers

Model Context Protocol servers that give agents tools and data.

Filesystem MCP Server

Reference MCP server for secure file operations with configurable access controls.

Open source

Fetch MCP Server

Reference MCP server that fetches web pages and converts them to markdown for LLMs.

Open source

Git MCP Server

Reference MCP server to read, search and manipulate Git repositories.

Open source

Memory MCP Server

Reference MCP server providing a knowledge-graph-based persistent memory.

Open source

GitHub MCP Server

GitHub's official MCP server for repos, issues, PRs and Actions.

Open source (MIT)

Playwright MCP

Microsoft's MCP server for browser automation via Playwright accessibility snapshots.

Open source (Apache-2.0)

Supabase MCP Server

Connects AI assistants to Supabase projects for tables, queries and config.

Open source

Stripe MCP / Agent Toolkit

Stripe's agent toolkit and MCP server for interacting with the Stripe API.

Open source (MIT)

Notion MCP Server

Official Notion MCP server for reading and writing Notion pages and databases.

Open source

Cloudflare MCP Servers

Cloudflare's MCP servers for Workers, observability, DNS and more.

Open source

Sentry MCP Server

Sentry's MCP server for querying issues, errors and performance data.

Open source

Context7

Upstash MCP server that injects up-to-date, version-specific library docs into prompts.

Open source

Firecrawl MCP Server

MCP server for web scraping, crawling and search via Firecrawl.

Open source (MIT)

Brave Search MCP Server

Brave's MCP server for web, news and local search via the Brave Search API.

Open source

Exa MCP Server

MCP server for Exa's AI-native web search API.

Open source (MIT)

Postgres MCP Pro

Postgres MCP server with query execution, index tuning and health checks.

Open source (MIT)

Linear MCP Server

Linear's official remote MCP server for issues, projects and comments.

Free with Linear

Browserbase MCP Server

Cloud browser automation for agents via Browserbase and Stagehand.

Open source

Figma Dev Mode MCP

Figma's MCP server exposing design context to coding agents.

Paid Figma plans

Zapier MCP

Connects agents to thousands of apps and actions through Zapier.

Free tier + paid

Sequential Thinking MCP Server

Reference MCP server that helps a model work through problems with structured, revisable step-by-step reasoning.

Open source

Time MCP Server

Reference MCP server for current time and timezone conversions.

Open source

Everything MCP Server

Reference test server exercising every MCP feature (prompts, resources, tools), useful for client developers.

Open source

Chrome DevTools MCP

Official Chrome DevTools MCP server letting coding agents control and debug a live Chrome browser.

Open source (Apache-2.0)

AWS MCP Servers

AWS Labs' suite of MCP servers for AWS documentation, infrastructure and services.

Open source (Apache-2.0)

Azure MCP Server

Microsoft's MCP servers, including Azure, for managing cloud resources from agents.

Open source (MIT)

MongoDB MCP Server

Official MongoDB MCP server for querying databases and managing Atlas.

Open source (Apache-2.0)

Neon MCP Server

Manage Neon serverless Postgres projects and run SQL via natural language.

Open source (MIT)

Atlassian Remote MCP Server

Atlassian's remote MCP server for Jira and Confluence.

Included with Atlassian Cloud

Slack MCP Server

Popular community MCP server for reading and searching Slack workspaces.

Open source (MIT)

Grafana MCP Server

Grafana's MCP server for dashboards, datasources and incident data.

Open source (Apache-2.0)

HubSpot MCP Server

HubSpot's MCP server for CRM data access by AI agents.

Free with HubSpot

Coding Agents

AI agents and IDEs that write, edit and ship code.

Cursor

AI code editor with agent mode, background agents and codebase-aware chat.

Freemium

Claude Code

Anthropic's agentic coding tool for the terminal and IDE.

Paid (Claude plans/API)

OpenAI Codex

OpenAI's software engineering agent available in ChatGPT, CLI and IDE.

Included with ChatGPT plans

GitHub Copilot

GitHub's AI pair programmer with agent mode and coding agent.

Freemium

Windsurf

Agentic IDE with the Cascade agent.

Freemium

Cline

Open-source autonomous coding agent for VS Code.

Open source (BYO API key)

Aider

AI pair programming in your terminal, git-aware.

Open source (Apache-2.0)

Devin

Cognition's autonomous AI software engineer.

Paid

Replit Agent

Builds and deploys full apps from natural language inside Replit.

Freemium

Bolt.new

StackBlitz's in-browser agent for prompting, running and deploying full-stack apps.

Freemium

Lovable

Builds full-stack web apps from chat prompts.

Freemium

v0

Vercel's generative UI and app builder.

Freemium

OpenHands

Open-source platform for software development agents (formerly OpenDevin).

Open source (MIT)

Gemini CLI

Google's open-source AI agent bringing Gemini to the terminal.

Open source (Apache-2.0)

Roo Code

Open-source AI coding agent for VS Code with custom modes (a Cline fork).

Open source (Apache-2.0)

Kilo Code

Open-source AI coding agent for VS Code and JetBrains.

Open source

Zed

High-performance code editor with an agent panel and Agent Client Protocol support.

Open source + paid AI

Continue

Open-source AI code assistant and agents for VS Code and JetBrains.

Open source (Apache-2.0)

Amp

Sourcegraph's agentic coding tool for the terminal and editors.

Paid (usage-based)

Jules

Google's asynchronous coding agent that works on GitHub repos in the cloud.

Freemium

opencode

Open-source AI coding agent built for the terminal.

Open source (MIT)

Augment Code

AI coding agent with a context engine for large codebases.

Paid

Junie

JetBrains' AI coding agent inside JetBrains IDEs.

Paid (JetBrains AI)

Agent Apps

End-user autonomous agents that complete tasks for you.

Manus

General-purpose autonomous agent that executes multi-step tasks.

Freemium

ChatGPT Agent

ChatGPT's agent mode that browses, uses tools and completes tasks on a virtual computer.

Paid ChatGPT plans

Perplexity Comet

Agentic browser from Perplexity.

Free

Genspark

AI agent workspace for research, slides, sheets and calls.

Freemium

No-code & Automation

Visual builders and automation platforms with AI agents.

n8n

Fair-code workflow automation platform with AI agent nodes.

Fair-code + paid cloud

Zapier Agents

Build AI agents that work across Zapier's app ecosystem.

Freemium

Make

Visual automation platform with AI agents.

Freemium

Relevance AI

No-code platform for building AI agent workforces.

Freemium

Lindy

No-code AI assistants/agents for email, scheduling and workflows.

Freemium

Dify

Open-source LLM app platform with visual agent and workflow builder.

Open source + paid cloud

Flowise

Open-source low-code builder for agents and LLM flows.

Open source (Apache-2.0)

Langflow

Visual, open-source builder for agents and RAG apps.

Open source (MIT)

Agent Infrastructure

Observability, sandboxes, memory, browsers, search and tool integrations for agents.

LangSmith

Observability, evaluation and tracing platform for LLM apps and agents.

Freemium

Langfuse

Open-source LLM engineering platform: tracing, evals, prompt management.

Open source + paid cloud

AgentOps

Monitoring and session replay for AI agents.

Freemium

E2B

Secure cloud sandboxes for running AI-generated code.

Freemium

Browserbase

Headless browser infrastructure for AI agents.

Freemium

Mem0

Memory layer for AI agents and assistants.

Open source + paid cloud

Composio

Tool integrations and auth layer for AI agents.

Freemium

Tavily

Search API built for AI agents and RAG.

Freemium

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