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© 2026 AgentStackBuilt for people building better agents.

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Frequently asked questions

What is AgentStack?+

AgentStack is a searchable, source-linked directory of 18,250 active agent tools: 1,575 skills, 16,628 MCP servers, and 47 plugins. We index public sources so builders can compare tools in one place.

What is an agent skill?+

An agent skill is usually a reusable SKILL.md document: instructions, workflows, and context that teach a coding agent how to handle a focused task. A skill can be installed into supported agent environments or read directly before use.

How do I install or use a listing?+

Open a listing and use its installation command when one is provided. For every listing, AgentStack also links to the original package or repository, so you can confirm the current setup steps and review the source before installing.

Are the listings free?+

Browsing AgentStack is free and needs no account. Each listing is independently maintained, so its license, pricing, and requirements come from its original publisher—always check the source page before adding a tool to an agent.

Browse taxonomy

Growth & Revenue65

Sales & Outreach16 SEO & Marketing49

Business Operations492

Analytics314 Business Ops178

Build & Ship595

Creative Studio80

Design & Presentations80

Workflows268

#ToolPopularity

brand-watch

Track your brand's share of voice in ChatGPT, Claude, Perplexity and Gemini. Pay per check.

registry

What a domain publishes for AI agents: ai-catalog.json, llms.txt, agents.md, robots.txt rules. Free.

reminders-bridge

MCP connector for Apple Reminders — search, create, complete, and edit via your own Mac.

gainium-mcp

MCP server for Gainium — manage trading bots, deals, and balances via AI assistants

bookings

Book appointments with Dr. Maggie Geller OD (Vancouver optometrist; myopia, dry eye, contacts).

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mcp-legal-entity-resolver

Resolve a company domain to its registered legal entity, company number, LEI and VAT number.

mcp-workplace-program-detector

Detect the employee programs a company publishes: ERGs, DEI, benefits, leave, volunteering.

mailtempo

MCP server for MailTempo's public free temporary email inboxes.

mcp-gtm-suite

11 Mamba Labs account-intelligence MCP tools in one server: identity, signals, ICP. Clay-ready.

mcp-publication-cadence-tracker

How often a company publishes long-form work, and whether that rate is rising or falling.

mcp-server

Connect AI agents to iTechSmart UAIO, ProofLink verification, and autonomous IT operations.

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bls-mcp-server

Fetch US Bureau of Labor Statistics data — CPI, unemployment, wages, JOLTS, and more via MCP.

investbrain

Investment discipline MCP server with RAG, behavior detection, journaling, and market data.

marketcheck-ai-reports

Vehicle valuations & market reports for AI assistants. Pay per report, no subscription.

api

MarketCheck automotive data: search US/UK listings, predict prices, decode VINs, market history.

mcp

AI marketing agent for Google Ads, Meta, GA4, TikTok, LinkedIn, Shopify, HubSpot and more.

mcp-fiscal-brasil

Servidor MCP para integrar IAs com o sistema fiscal brasileiro: CNPJ, NFe, NFSe, SPED, eSocial.

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site

Blog posts, work experience, projects and contact details for Markus Tenghamn, as MCP tools.

census

Vet any MCP server before you depend on it: live health from GitHub, npm and PyPI.

emails

Read, search, send, organize, draft and schedule email across your inboxes from any MCP client.

pgauditor

Hosted MCP server for PostgreSQL diagnostics: slow queries, missing indexes, connection pressure.

mcp-mux

McpMux — configure MCP servers once, connect every AI client through one local gateway.

website-builder

Build & edit your own website by talking to your LLM: pages, forms, SEO, analytics. Free to start.

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search-console

Query Google Search Console analytics (clicks, impressions, CTR, position) over MCP.

gateway

Korea-native MCP gateway: Korean commerce, payments, messaging, gov & finance APIs for AI agents.

japan-public-ledgers

Tamper-evident daily ledgers of 12 Japanese public-data domains, with cross-ledger entity search.

mcp

Search thousands of active YouTube sponsors and 60,000+ channels from any MCP client. Free tier.

valis-credit-intelligence

Private credit intelligence: company search, credit models, IC memos, and live market data.

memory

Give every AI you use one shared, permanent memory. Store once, recall in whichever AI you open.

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local-discovery

Citation-backed honey producer discovery by place or varietal. Free, no auth.

docs

Search how-to docs for Merchinary's Shopify Bulk Product Editor and Image Editor apps.

digest

Turkish gold-market digest, derived indicators and analysis search. Keyless, read-only, gated.

mfgcalcs

5,400+ manufacturing calculators plus live U.S. tariff, PMI, cost-index, wage, and forecast data.

good-honker

Ask Claude about Goose shows: setlists, jams, venues, song history. Live from ElGoose.net.

nuget

A Model Context Protocol (MCP) server for NuGet.

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calculator-mcp-server

Evaluate, simplify, and differentiate mathematical expressions.

medusa-mcp

Retrieve information from the Medusa documentation to assist you with your Medusa development.

mcp-server

Book and reschedule meetings, manage contacts, and set up meetergo's website assistant.

mcp

AI-to-human attention marketplace. Agents pay CPM to reach humans, earn credits by replying.

monitoring

Monitoring for agencies — uptime, SSL, DNS, blocklists, AI visibility, MCP health. 8 no-auth tools.

neutral-skincare-reference

Neutral, payment-blind reference of 1,682 dermacosmetic products: lookup, search, alternatives.

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workiq-calendartools

Calendar tools for creating, updating, deleting events, managing invites, and checking availability.

workiq-wordserver

MCP Server containing tools to work with Microsoft Word document

outlook-email

A MCP server for Outlook email that lets you search, read, and draft emails and replies.

moonlora

Moon phases, moon signs, full/new moon dates 1900-2100, moonrise/moonset for any coordinates.

mtgbench

Magic: The Gathering card search, rules, rulings, deck analysis, brackets, and combo detection.

okdoc

E-signature & document automation: create, send, track and sign documents with payments. 38 tools.

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matterfact

Investment research superagent: podcasts, SEC filings, and no-code research pipelines.

@mrrlin-dev/external-agents

Multi-LLM MCP server for Claude Code & Codex — route AI agent work across 20+ low-cost provider buckets with round-robin dispatch and quota-aware fallback.

calculator

Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.