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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

tubescribe

YouTube transcripts, metadata, timestamps, and AI summaries for AI agents. Auth: x-api-key.

food-db

Resolve Japanese food names to nutrition facts. All 2,538 foods from Japan's official tables.

frisk

Screen the counterparty of an x402 payment before an agent pays it. Runs offline by default.

urantia-papers

Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.

1k-patient-mcp

1k patient MCP server

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reference-data

N American govt data, cited to source: rates, VAT, tax, wages, holidays, FX. 10 countries; USA free.

mcp

Deploy, monitor, and manage your OpenClaw AI assistants via natural language.

referral-codes

Verified referral and discount codes for crypto exchanges, wallets and trading tools. Read-only.

consistency-gate

Check claims against a fact-store: consistent, contradicts, or unverifiable — with a receipt.

cadlens-mcp

Model Context Protocol server that wraps the CADLens REST API.

trinity-research

Fact-check claims against live web sources: verdict, consensus, cited sources, PII redaction.

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flowstudio-mcp

Debug, build, and manage Power Automate cloud flows with AI agents

values-firewall

EU AI Act Art-14 runtime oversight: allow / flag / gate-to-human on an agent action, with receipt.

server

Access and edit your Craft documents.

snooze

Watch domains and forecast when they drop; check a name's domain, handles, and trademark.

ego

Write LinkedIn posts in your own voice. Drafts only, ego never publishes for you.

real-estate

Live Estonia real estate listings with search, geo filters, and property metadata.

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wristwise

Ask about your sleep, heart rate and wellness trends from your smartwatch.

mcp

Create and manage Templated email templates from any MCP client - bring your own model.

zerm

Agent utility belt: memory, locks, webhook inboxes, timers, DNS, email, URL, timezone, cron

instxnt

Create instxnt.xyz storefronts through Claude: add products, connect Stripe, go live.

registry

Curated, probe-verified directory of paid x402 APIs. Agents check it before spending money.

council-consult

Stress-test a decision through named thinkers' lenses: assumptions, counter-arguments, receipt.

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palisade

Monitor and manage email authentication (SPF, DKIM, DMARC, MTA-STS, BIMI) for your domains.

belgian-law-mcp

Belgian legislation via MCP — full-text search across statutes and provisions

brazil-law-mcp

Brazil legislation via MCP — full-text search across statutes and provisions

colombian-law-mcp

Colombian legislation via MCP — full-text search across statutes and provisions

egyptian-law-mcp

Egyptian legislation via MCP — full-text search across statutes and provisions

deepseek

MCP server for DeepSeek AI with chat, reasoning, sessions, function calling, and cost tracking

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atproto

Search ATProto writing, annotations, identity, agents, and forum posts. 12 read-only tools.

corvid

Persistent memory for AI agents. Semantic recall by meaning, not just keywords. No signup needed.

meetwhen

Free no-signup group scheduling (a modern When2meet): share one link, find a time for everyone.

mcp

Subvenciones, licitaciones y boletines oficiales de España y Europa para tu IA. Gratis, sin login.

email-testing

Disposable test mailboxes on a real domain: send, receive and assert on real email.

verifly

Email verification for AI agents — verify, clean & validate emails; self-onboard + crypto pay

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paki-curator

300 contemplative moving art works by César Yagüe. Search, browse, get recommendations.

cambodian-law-mcp

Cambodia legislation via MCP -- full-text search across statutes and provisions

estonian-law-mcp

Estonian legislation via MCP — full-text search across statutes and provisions

fattureincloud-mcp

Italian e-invoicing with Fatture in Cloud. Create, send to SDI, manage clients.

golden-dataset-mcp

Version-controlled golden datasets and RAG evaluation, no API key needed.

sefaria

Access Sefaria's library of Jewish texts, commentaries, and learning schedules via MCP

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xfms

Pick the right LLM for any task. Ranked shortlist with rationale across 8 evaluators.

fastmcp-trello

Manage Trello boards, lists, and cards from any MCP-compatible AI assistant

reecopedia

Regulatory search engine for EU textile sustainability law: ESPR, DPP, CSRD, CBAM, CWA 18291.

travel-search

Realtime package holiday and charter flight prices from Denmark. Inventory not on Google Flights.

mcp

Provides data for LEGO sets, minifigures, parts and elements. Not affiliated with LEGO® Group.

mcp

Danish parliamentary cases, votes, politicians, parties, elections, and comparison tools.

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arhiiv

Estonian jewellery art archive: 472 artists, works, exhibitions, museum holdings, source-cited press

calc

88 free engineering calculators: RF link budgets, LoRa/Meshtastic, PCB, solar, homelab. Keyless.

cartelera

Cartelera de España: películas, cines, sesiones, recomendaciones y enlaces de compra.