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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

marketplace

Search and browse global classifieds across 80 markets. No auth required for read-only access.

vitamin-d

Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.

Nova3D

Structured, part-aware 3D generation for AI agents. Named-part GLB, preview URL, Blender script.

remembrallmcp

Persistent knowledge memory for AI agents. Hybrid search, code graph, pgvector.

mirror-ai-citability

AI Citability across AEO, GEO, SEO & MCP: is a brand cited & callable? Free Lite Reflection.

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mcp-server

Buy gift cards and top-ups from the industry leader. 6000+ brands, 195 countries. 4.7★, 98% CSAT

mcp

DMARC analytics for AI assistants — domain health, SPF/DKIM records, compliance stats, anomalies.

freight-intel

Freight carrier intel: new FMCSA authority feed, carrier lookup by DOT/MC, safety screen (CSA/SMS).

total-recall

Persistent, verified, cross-session memory for AI agents. 26 tools. SQLite + sync.

e-yearbook

Search over 300K U.S. yearbooks, over 100M mentions. Free preview; subscription unlocks scans.

indian

Official Divine API MCP for Indian/Vedic Astrology: Panchang, Kundli, Dasha, KP, Lal Kitab.

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legit-check

Screen a vendor, store, or group-buy for legitimacy: reputation, red flags, Reddit sentiment.

rpgmaker-xp-mcp

Author RPG Maker XP games in natural language: read, write and render RGSS1 .rxdata.

intelthreadlinqs-mcp

Threadlinqs threat-intelligence MCP — 73 tools: threats, detections, IOCs, actors, C2, MITRE, CVEs

mcp

ThousandEyes MCP Server for network intelligence: outages, anomalies, alerts, events, and tests.

decision-intelligence

Pay-per-call retail, advertising, and app-release decision intelligence.

callwright

Self-hosted MCP voice agent that places phone calls on your behalf via Retell.

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market-data

33 pay-per-call market and news data tools over MCP with free discovery and x402 payments.

paycheck

Live US paycheck and payroll-tax math for 2026, all 50 states and DC, powered by tools-berry.com.

openapi-lint

MCP server (stdio): lint OpenAPI specs with Spectral via the AgentForge API

tw-market-data

Taiwan stock market data (TWMD): official-source, point-in-time-safe datasets via read-only tools.

aegis

Six-gate governance for AI agents: PROCEED/PAUSE/HALT decisions with hash-chained audit trails.

ugc-pocket

Promote your app or software with UGC creator videos. Agent drafts the campaign, a human funds it.

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mcp-server

AI-powered product search, affiliate links, and price negotiation for e-commerce platforms

rms-mcp

Verity RMS — AI-powered investment research management. Search your notes, meetings, and research.

gearboy

MCP server for Gearboy Nintendo Game Boy / Game Boy Color emulator

orgx-mcp

Make AI work resumable, reviewable, and provable across agents.

launch-record-lookup

Look up a domain's public Website Launches launch record, owner verification & trust context.

utilsforagents-mcp

Pay-per-call AI agent utilities via x402 on Base (USDC). 7 tools, $0.003/call.

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interline

Neutral, non-custodial MCP payment router: discover rails, then pay across them.

wafergraph-mcp

Read-only MCP server for wafergraph.com's semiconductor & AI supply-chain data: 30 tools, no auth.

meritvalue

Intrinsic stock value from SEC filings: DCF, EPV, Graham, moat signals. Deterministic, not guessed.

mcp

AI agent recruiting: talent pool match, reference checks, credit packs via Stripe MPP

vouchtrail

Evidence-first trust verdicts for AI-agent services — query one before you transact.

unblink

Pure-Go browser for AI: fetch pages, render JS without Chromium, return clean Markdown over MCP.

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mcp

Post to social media (Facebook, Instagram, LinkedIn, Pinterest, YouTube, TikTok, X/Twitter and more)

mcp-esim

Travel eSIMs for 193 countries. Stripe + Bitcoin checkout. QR by email in 30s. No API key.

vitex

Generate tailored, ATS-optimized resume PDFs and cover letters from a job description, over MCP.

viral-outliers

Find viral outlier posts on TikTok, Instagram and YouTube, pull creator stats, and crawl on demand.

website2vat

Finds public VAT and company registration identifiers from website domains.

vibrai

Arrange your own clips and instruments into finished song structures in Ableton Live 12.

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uploadkit

UploadKit MCP — 40+ upload components, route scaffolds, BYOS setup, full docs search.

agentic-rails

Agentic rails for complex workflows with receipts, fees, and MCP tool access.

gearlynx

MCP server for Gearlynx Atari Lynx emulator

f1-2026

Formula 1 2026 schedule MCP — 24 races, drivers, constructors, sessions, circuits, race times.

reference-data

Mid-East govt data, cited to source: rates, VAT, tax, wages, holidays, FX. 9 countries; UAE free.

mcp

Ephemeral MicroVM-isolated code execution for AI agents. Fresh VM per call, hard-purged after.

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ats

Which ATS does a company use? Portal-verified answers for 743 employers + resume ATS check. No key.

dynatrace-managed-mcp

MCP server for Dynatrace Managed to access logs, events, and metrics.

stablecoinx-mcp

Drive a StablecoinX business account — auth, API keys, sessions, paymaster, and webhooks.