The infrastructure AI agents run on.
Cloud browsers, sandboxes, memory, search, email, payments and voice. One checked list for people shipping agents, not demos.
Popular:Browsers & Computer UseCode SandboxesMemory & ContextSearch & Web DataEmail
Covering Browserbase, E2B, Mem0, Exa and 50 more
Categories
Browse by layer of the stack
Featured
Featured and sponsored
Paid placements, always labeled and kept out of the organic list.
Just added
New this week
-
Agent 37
agent37.comCloud sandboxes for running AI agents, positioned as lower-cost agent infrastructure.
-
Pickle Browser
picklebrowser.comLocal browser that opens real pages for agents, shows its work on your machine, and needs no account.
-
AIO Sandbox
sandbox.agent-infra.comAll-in-one agent sandbox with browser, shell, file access, VSCode Server, and MCP in one container.
-
Browserbase
browserbase.comHosted headless browsers for agents, with session control and an MCP server.
-
Browser Use
browser-use.comOpen-source browser agent library plus hosted remote browsers for AI agents.
-
Steel
steel.devOpen-source browser API for running fleets of cloud browsers for agents.
-
Hyperbrowser
hyperbrowser.aiCloud Chrome sessions, isolated sandboxes, and web data APIs for agents.
-
Stagehand
stagehand.devSDK for browser agents with a Playwright-style API and self-healing selectors.
Directory
Browse the stack
-
Agent 37
agent37.comCloud sandboxes for running AI agents, positioned as lower-cost agent infrastructure.
-
AgentMail
agentmail.toEmail inbox API for agents: create, send, and receive real inboxes.
-
AgentOps
agentops.aiTracing and debugging for AI agents.
-
AIO Sandbox
sandbox.agent-infra.comAll-in-one agent sandbox with browser, shell, file access, VSCode Server, and MCP in one container.
-
Anchor Browser
anchorbrowser.ioInfrastructure for computer-use agents that automate web tasks at scale.
-
Apify
apify.comMarketplace of ready-made scrapers and automation tools callable by agents.
-
Arcade
arcade.devActions runtime that lets agents act on users' behalf with governed auth.
-
Auth0 for AI Agents
auth0.comAuth0 tools for user login, token vaults, and permissions in AI agents.
-
Braintrust
braintrust.devObservability and evals platform for production agents.
-
Brave Search API
brave.comIndependent web search API covering a 40B+ page index.
-
Browser Use
browser-use.comOpen-source browser agent library plus hosted remote browsers for AI agents.
-
Browserbase
browserbase.comHosted headless browsers for agents, with session control and an MCP server.
-
Cloudflare Sandbox SDK
developers.cloudflare.comRun untrusted or generated code in Linux VMs or isolated Workers on Cloudflare.
-
Cognee
cognee.aiOpen-source agent memory platform built on graph and vector stores.
-
Coinbase x402
x402.orgOpen standard for internet-native payments using HTTP 402, built for agents.
-
Composio
composio.devTool calls with delegated auth across 1,500+ apps for agents.
-
CrewAI
crewai.comFramework and platform for multi-agent teams.
-
Daytona
daytona.ioSecure sandboxes for running AI-generated code.
-
E2B
e2b.devIsolated cloud machines for agents to run code, browse, and use tools.
-
ElevenLabs Agents
elevenlabs.ioBuild and deploy chat and voice agents on ElevenLabs.
-
Exa
exa.aiSearch API built for AI agents, with real-time web data and deep research.
-
Firecrawl
firecrawl.devTurns websites into clean, LLM-ready data with crawl, scrape, and search APIs.
-
Helicone
helicone.aiAI gateway with routing and LLM observability.
-
Hyperbrowser
hyperbrowser.aiCloud Chrome sessions, isolated sandboxes, and web data APIs for agents.
-
Jina Reader
jina.aiConverts any URL to Markdown for grounding LLMs.
-
Kernel
kernel.shBrowser infrastructure for web agents with reusable sessions and fast spin-up.
-
Langfuse
langfuse.comOpen-source tracing, evals, and observability for agents.
-
LangGraph
langchain.comAgent orchestration framework with durable execution and human-in-the-loop.
-
LangSmith
langchain.comLangChain's tracing and monitoring platform for agents and LLM apps.
-
Letta
letta.comPlatform for stateful agents that keep long-term memory.
-
Mailgun
mailgun.comEmail API to send, receive, and track email.
-
Mastra
mastra.aiTypeScript framework for agents with memory, tools, MCP, and workflows.
-
Mem0
mem0.aiMemory layer that lets agents learn from past interactions.
-
Modal
modal.comServerless cloud for running, training, and serving AI workloads, including sandboxes.
-
Nango
nango.devIntegration platform connecting products and agents to 1,000+ APIs.
-
OpenAI Agents SDK
openai.github.ioOpenAI's lightweight Python framework for multi-agent workflows.
-
Parallel
parallel.aiWeb search, extraction, and monitoring APIs built for AI.
-
Pickle Browser
picklebrowser.comLocal browser that opens real pages for agents, shows its work on your machine, and needs no account.
-
Pipedream Connect
pipedream.comManaged auth and thousands of prebuilt tools across 3,000+ APIs.
-
Pydantic AI
pydantic.devType-safe Python agent framework from the Pydantic team.
-
Resend
resend.comDeveloper email API for transactional and marketing mail.
-
Retell AI
retellai.comVoice agents for inbound and outbound phone calls.
-
Runloop
runloop.aiCode sandboxes (Devboxes) for AI coding agents, plus evaluations.
-
Skyfire
skyfire.xyzIdentity and payment credentials for AI agents on the open web.
-
Smithery
smithery.aiRegistry and hosting to connect agents to MCP tools and services.
-
Stagehand
stagehand.devSDK for browser agents with a Playwright-style API and self-healing selectors.
-
Steel
steel.devOpen-source browser API for running fleets of cloud browsers for agents.
-
Stripe Agent Toolkit
docs.stripe.comStripe's MCP server, plugins, and skills for agents that handle payments.
-
Supermemory
supermemory.aiMemory and continual learning engine for agents.
-
Tavily
tavily.comReal-time search and content extraction APIs for agents.
-
Vapi
vapi.aiDeveloper platform to build, test, and deploy voice AI agents.
-
Vercel AI SDK
ai-sdk.devUnified TypeScript SDK for AI apps and agents across model providers.
-
Vercel Sandbox
vercel.comIsolated Linux microVMs on Vercel for untrusted or agent-generated code.
-
Zep
getzep.comContext layer that unifies business data, documents, and chats for agents.
Nothing matches yet. Know a tool that should be here? Submit it.
FAQ
Questions
What is Agent Stack Directory?
A free, hand-checked directory of 54 infrastructure tools for AI agents, grouped into 11 categories like cloud browsers, code sandboxes, memory, and web search.
How are tools chosen?
Each tool is built for or widely used by people building AI agents. Every link is opened and checked before it is listed, and listings are rechecked regularly.
How do I get my tool listed?
Submit it on the submit page. Free listings are reviewed in order. Sponsors get a featured slot on every page.