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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

hyperliquid-mcp

Hyperliquid - 2 tools for perpetuals, options, and position data

mcp

Connect your AI to human workers. Get paid to help AI.

social-intel-mcp

Trending topics, cross-platform sentiment, viral content, community pulse & brand mentions.

tripwire

MCP for Roblox Studio and Open Cloud: drive Studio, run headless tests, and review game security.

samotpravil-mcp

MCP server for Samotpravil API — docs, typed tools, Python SDK parity, safety flags.

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holydb-mcp

Read-only MCP server for HolyDB: find Catholic parish Mass times by location and time.

dmcheck

Deterministic conduct verdicts for live tabletop sessions - CI for running a game.

clarity

Condition-aware ingredient and product checks for agents, with evidence tiers and citations.

mcp

Smart Money Verdict per stock & fund from SEC 13F, insider, activist & congressional filings.

brand-authority

Grounded Horizon Media brand Q&A for AI assistants. Authenticated MCP; brand_authority_query.

gmocoin-fx-mcp

MCP server for GMO Coin FX trading, positions, executions, klines, and account balances.

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sentimatix

Real-time NSE/BSE stock sentiment, news NLP, technical analysis & RAG search via MCP.

irs-taxpayer

39 tax tools for US taxpayers: federal/state tax, credits, deductions, retirement. All local.

mcp

Composable APIs for document extraction, image transformation, and document & sheet generation.

cook-county-property-data

Cook County / Chicago property by address or PIN: sales, permits, assessments, comps. Pay via x402.

mcp

Manage tasks, sprints, projects, and wiki pages in your Ithura workspace.

amicus

Multi-model LLM Council and parallel AI window for Claude Code. Fork any model, fold results back.

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mcp

Connect AI agents to IoT devices — read sensors, send commands, manage ESP32 fleets.

grandline-mcp

Empirical maritime distances from real AIS tracks: 4 route variants, port lookup, bulk matrix

jupitersignup

List, read, create, and edit JupiterSignup sign-up and payment forms. API key required.

kage

Verified memory for coding agents: claims cited against code, stale withheld, savings receipts.

sealed-forecasts

Bitcoin-anchored sealed-forecast record: search, grades, calibration, luck test. Read-only, no key.

regex-generator

Test, validate and explain regular expressions with match highlighting. x402 micropayment.

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devicecloud

Triage failing DeviceCloud Maestro test runs: fail reasons, screenshots, flaky-flow analytics

keepmysubs

Manage your KeepMySubs subscriptions, spend, renewals, and bills from any MCP client.

email-finder

Find email addresses from name and company domain. x402 paid.

uniswap-mcp

Uniswap - 17 tools for swap quotes, liquidity pools, and trading data

kajabi

Manage Kajabi from any MCP client — products, pages, contacts, offers, emails, analytics.

rag-vault

Local RAG MCP server with hybrid search, PDF/DOCX support, and zero-config setup

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akb

Git-backed org memory for AI agents — hybrid search, tables, files & a URI graph over MCP.

kapruka-mcp

Free public MCP server for Kapruka.com — Sri Lanka's largest e-commerce platform.

eu-energy-label-preflight

Read-only EU energy-label preflight over MCP: supplier-declared EPREL records, evidence-first

agent-mcp

Korean-Japanese bilingual community. Read public posts/comments, route Korea/Japan queries.

crontab-generator

Natural language to cron expression converter. x402 micropayment.

Knapcode.SampleMcpServer

A sample MCP server using the MCP C# SDK. Generates random numbers and random weather.

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funding-rates

Perp funding rates across Binance, Bybit, OKX — open interest, sentiment. x402.

mcp-retrieval

Web search, image search, and page scraping as Markdown. No API keys required.

posokanei-mcp

Unofficial read-only MCP server for Greek supermarket price data from PosoKanei.

currency-converter

Fiat and crypto currency conversion — ECB + CoinGecko rates. x402 micropayment.

ghost-inspector-mcp

Analyze, validate and safely update Ghost Inspector end-to-end browser tests

email-deliverability

Audit email domain deliverability: SPF, DKIM, DMARC, MX. Score 0-100. x402.

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http-headers

HTTP header analysis â€” security headers, cache, server detection. x402 micropayment.

flashbank

Fixed-fee P2P term loans (no oracles) and flash loans on Ethereum, Base, Arbitrum and Sepolia.

web-scraper

Extract clean markdown from any URL. Removes boilerplate. For RAG pipelines. x402.

mcp-docker-release-information

MCP server providing Docker Desktop release notes and security information.

z-zero-mcp

Payments for AI agents: gasless USDC on Base + JIT single-use virtual cards, PAN never in context.

email-verification

Verify emails: syntax, MX records, disposable detection, quality score 0-100. x402 USDC.

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verify

Free, no-account verification of KeyHalve-sealed documents. Read-only; never receives keys.

poemcp

MCP server for Path of Exile game data: wiki, economy, and Craft of Exile lookups

marketplace

Third-party sandbox verdict on any artifact in one call, no account. Also an agent marketplace.