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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

clipkit

MCP server for Clipkit — gives AI agents a video toolbox via the Clipkit schema.

scrub-mcp

Stateless PII redaction over MCP/REST. Free ≤1000 words or $0.01/call; file upload supported.

longwatch

Watch web pages, RSS, crypto prices and SEC filings; poll one endpoint for alerts. USDC per call.

costheta

Verifiable physical randomness from cosmic-ray detections. Free beacon, paid signed decisions.

draugr

Security scanning for AI agents: SAST, SCA, secrets, IaC, DAST, ranked by real risk.

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e18e

The official e18e MCP server keeping your agent in check from installing bloated dependencies.

domainee

Custom domains API for SaaS: connect, verify, and manage customer domains, SSL, and DNS

management

Manage EchoRelay API integrations from any MCP client: lines, endpoints, keys, billing, logs, DLQ.

registry

Free dual MCP+agent registry. Probe Live, free demo, Kernel/Loop. Self-list + dual strategy.

bookings

Book appointments with Dr. Maggie Geller OD (Vancouver optometrist; myopia, dry eye, contacts).

mcp-legal-entity-resolver

Resolve a company domain to its registered legal entity, company number, LEI and VAT number.

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mcp-workplace-program-detector

Detect the employee programs a company publishes: ERGs, DEI, benefits, leave, volunteering.

mailtempo

MCP server for MailTempo's public free temporary email inboxes.

mcp-gtm-suite

11 Mamba Labs account-intelligence MCP tools in one server: identity, signals, ICP. Clay-ready.

mcp-publication-cadence-tracker

How often a company publishes long-form work, and whether that rate is rising or falling.

mcp-server

Connect AI agents to iTechSmart UAIO, ProofLink verification, and autonomous IT operations.

bls-mcp-server

Fetch US Bureau of Labor Statistics data — CPI, unemployment, wages, JOLTS, and more via MCP.

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japan-public-ledgers

Tamper-evident daily ledgers of 12 Japanese public-data domains, with cross-ledger entity search.

mcp

Search thousands of active YouTube sponsors and 60,000+ channels from any MCP client. Free tier.

valis-credit-intelligence

Private credit intelligence: company search, credit models, IC memos, and live market data.

memory

Give every AI you use one shared, permanent memory. Store once, recall in whichever AI you open.

local-discovery

Citation-backed honey producer discovery by place or varietal. Free, no auth.

docs

Search how-to docs for Merchinary's Shopify Bulk Product Editor and Image Editor apps.

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digest

Turkish gold-market digest, derived indicators and analysis search. Keyless, read-only, gated.

mfgcalcs

5,400+ manufacturing calculators plus live U.S. tariff, PMI, cost-index, wage, and forecast data.

good-honker

Ask Claude about Goose shows: setlists, jams, venues, song history. Live from ElGoose.net.

nuget

A Model Context Protocol (MCP) server for NuGet.

calculator-mcp-server

Evaluate, simplify, and differentiate mathematical expressions.

matterfact

Investment research superagent: podcasts, SEC filings, and no-code research pipelines.

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@mrrlin-dev/external-agents

Multi-LLM MCP server for Claude Code & Codex — route AI agent work across 20+ low-cost provider buckets with round-robin dispatch and quota-aware fallback.

calculator

Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.

registry

The evidence layer for MCP: live operational grades plus Trust Receipts for every registry server.

weather

Multi-model weather forecasts: point series, model scoreboard, and gridded fields. No auth.

drug-label-server

Search and export FDA drug labels by brand name, generic ingredient, or UNII code.

memfleet

Shared, governed memory for fleets of AI agents: judged contributions, provenance, operator control

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social-listening

Track social mentions, find opportunities, and manage keywords with Mentionkit.

workiq-mailtools

Comprehensive tools for email operations including create, send, reply, update, delete, and...

good-wook

Ask Claude about Phish shows: setlists, song gaps, jams, venues. Live from Phish.net.

whoop

WHOOP recovery, strain, sleep and workouts in Claude via official WHOOP OAuth. Free, open source.

mcp-transactions-data

MCP server for transaction lookup across EVM, UTXO, Solana, XRP, Kaspa via Crypto APIs

mcp

Licensed metal, mineral & commodity price indices, history & forecasts by form, grade & region.

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velmo

Diagnóstico patrimonial 360 (Wealth X-Ray) somente leitura, com fontes e próximos passos.

mcp

Create, edit, and organize MindMeister mind maps from your AI assistant.

nuditok

Search adult short-form video: clips, creators and hashtags. Read-only, no API key.

motion-tools

Render animated motion-graphics overlays as MP4: lower thirds, titles, callouts

travel

Aggregated travel MCP — flights, tours, activities, price checks, visas, and more.

mozonic

AI mixing and mastering: analyze your mixes, run DSP autofix, render stems, and master tracks.

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mcp

Salesforce-grounded retrieval, diagnoses, and a vetted-Force marketplace for MCP clients.

agent-tools

Realtime wig stock, restock ETAs, and cross-brand color matching for AI agents.

studiopro

AI product-photography studio over MCP: generate, edit, cut out, and search images by project.