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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

fast-mcp-telegram

Telegram MCP server with search and messaging capabilities

leakferret

Context-aware secret scanner: lets an AI agent scan, verify, and rewrite secrets before committing.

leanriq

Creative-intelligence MCP for campaign strategy, ad builds, QA, and reporting.

lawbor

Reputation-gated messaging + job negotiation for Base AI agents. Descriptor-only, nothing signs.

lithtrix

Search, browse, memory and blob storage for AI agents. One key at lithtrix.ai, Spark trial free.

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ris

Access Austrian laws, court decisions & legal documents via the RIS API.

agentflow

Wash/sybil screening + Real-Agent Index for Base wallets — real agent or fake-volume sybil?

mcp

Phrase MCP server: language intelligence platform for translation, terminology, and quality.

handinloop-mcp-server

Human-in-the-loop document extraction: submit a doc, get validated fields and an audit trail.

mcp-gads

Google Ads MCP server — query campaigns, keywords, assets & more via natural language

mcp-datalink

MCP server for secure database access (PostgreSQL, MySQL, SQLite)

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orchard-data-mcp

Pay-per-call market data for AI agents via x402 (USDC on Base): regime, track record, catalysts.

pipehero

Debug webhooks from your AI agent: inspect and replay captured webhooks on localhost.

mcp-graphql-enhanced

GraphQL gateway for LLMs. Handles huge GitHub GraphQL & @neo4j/graphql schemas without crashing

abuseipdb

AbuseIPDB MCP — wraps AbuseIPDB v2 API (api.abuseipdb.com/api/v2)

lemonado-mcp-server

MCP server for querying and analyzing data from ad platforms, analytics tools, and spreadsheets

mineru

MinerU document parsing API — PDFs, images, DOCX, PPTX with OCR and batch processing.

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agent-search-mcp

Free-first Chinese and English web search MCP using zero-key sources and inspectable evidence.

codeforces

Codeforces competitive programming users, contests, problems

horizon-fidelity-monitor

Tracks conversation health in real time — drift, desync, and causal collapse — for any AI agent.

ivd

33 tools that make AI write, implement, and verify intent against explicit, testable constraints.

rihla

Flexible multi-leg, multi-airport flight search - cheapest valid combination across an itinerary.

ifun

Bilingual (VN/EN) jokes, quotes, fun facts and short videos from ifun.genai.io.vn.

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pestprocrm

Manage pest control operations — customers, scheduling, SMS, payments, and reporting.

listingbureau-mcp

Amazon organic ranking MCP server. Run campaigns, track positions, monitor rank movement.

trustbench

x402 provider rankings + Ed25519-signed payment receipts + signature verification (3 tools).

vox-mcp

Multi-model AI gateway — 8 providers plus local models, no system prompt injection.

liquefy-ui

Answers questions about liquefy-ui from its real API surface, so an agent stops inventing props.

changelog-mcp-server

Convert natural language into validated Liquibase XML or SQL changesets. 19 tools, 12 databases.

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outlook-mcp

Microsoft Outlook MCP server — 20 tools for email, calendar, contacts, and settings via Graph API.

inbox-check

Email inbox placement tests across Gmail, Outlook, Yahoo, Mail.ru, Yandex (SPF/DKIM/DMARC).

contai-mcp-server

32 ferramentas MCP de cálculo fiscal/trabalhista BR (CLT, INSS, IRRF, PJ, finanças, saúde).

itjuzi-mcp

Hosted MCP for IT桔子 primary market company, funding, investor and sector data.

agentcn

出海合规预检 · Source-cited EU/US/UK/AU market-access checks for cross-border sellers

agentpub

Public, agent-native chat for AI agents. 6 channels. Zero auth. MCP + A2A + WebSocket.

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tokenmonkey

P2P wagering protocol for AI agents on Solana. Coinflip & dice challenges for USDC.

autonomous-prime

162 AI agents for Solana crypto intelligence, wallets, and x402 micropayments.

pddikti-mcp-server

MCP server untuk pencarian data PDDikti: perguruan tinggi, dosen, mahasiswa, prodi (9 tools).

stb-mcp-server

MCP server untuk kelola server STB Armbian: system info, Docker, AdGuard, file ops via SSH.

mcp-server

Give AI agents a Bitcoin wallet with Lightning Network payments and L402 support.

gnomon-mcp

Deterministic batch tools so LLM agents stop guessing dates and math.

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nwc-mcp

Lightning wallet for AI agents via Nostr Wallet Connect (NIP-47): budget caps, confirm, audit log.

paperbanana

Generate academic diagrams and statistical plots from text using multi-agent AI.

agentstorefront

MCP for AgentStorefront — discover, price, and subscribe to paid agent services.

fittok

Retrieve only the relevant code for a codebase question, within a token budget.

sieve-mcp

AI startup due diligence — screen companies across 7 dimensions, get a Sieve Score.

genai-capture

Capture & annotate your screen from an AI agent: arrows, boxes, text, highlight, blur/redact.

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what2watch-mcp

Real-time TV schedules, streaming availability, and personalized recommendations.

firstdollar

An MCP that teaches AI agents to use the wallets they already have. Teacher, not butler.

author-mcp-server

Recall, check, search, timeline, and graph tools for fiction writers via Seizn Memory v3.