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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

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.

propertylist

First-party Spanish, Portuguese and Italian property listings with notarial-verified prices.

census-mcp-server

Query U.S. Census Bureau data, variables, and geography via MCP.

mcp-server

Detect fabrication and hallucination in any LLM output. 30+ models supported.

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profiles

AI-powered candidate profiles for foreign professionals in Spain and Europe.

workspace-activity-reference-workbench

Append an operations activity entry

botswana-law-mcp

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

cypriot-law-mcp

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

dutch-law-mcp

Query Dutch statutes, 202K+ court decisions, EU cross-references, and kamerstukken

french-law-mcp

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

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indonesian-law-mcp

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

jordanian-law-mcp

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

accuweather-mcp

MCP server providing weather tools with data sourced from AccuWeather.

hubvibe

Rule-based site audits: accessibility, SEO, security headers, performance. Metered per call.

finnish-law-mcp

Query Finnish statutes from Finlex, EU cross-references, case law, and preparatory works

israel-law-mcp

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

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lithuanian-law-mcp

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

moroccan-law-mcp

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

peruvian-law-mcp

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