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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

legal-mcp-server

Federal and state court records lookup for due-diligence and background checks.

patents-trademarks-ip-mcp-server

Patent & trademark IP search — patents, assignees, and inventors via Google Patents.

real-estate-mcp-server

Redfin listings, sale-comps, and neighborhood market data via natural-language queries.

sales-intelligence-mcp

B2B sales intelligence — company emails, enrichment, lead lists, hiring & funding signals.

sec-corporate-events-mcp

Extract papers from ArXiv — titles, abstracts, authors, categories & PDF links. Monitor new AI, phys

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hr-compensation-mcp-server

H1B visa salary disclosures + compensation benchmarks — real numbers, not estimates.

labor-compliance-mcp

MCP server giving AI agents one-connection access to labor & financial-compliance data: DOL Form 550

playwright-mcp-server

Headless browser primitives for AI agents when sites need real JS rendering.

reddit-mcp-server

Post + comment + subreddit search with comment-level depth for sentiment work.

validator

Validate oh-my-posh configurations and segment snippets against the official schema.

reliability

Preflight agent claims, issue checkout links, and verify signed Corbelworks action receipts.

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yahoo-finance-mcp-server

Yahoo fundamentals: earnings, P/E, analyst targets, peer comparisons for equity research.

mcp

Connect your MetaTrader 5 accounts to Claude: trading, market data, account management.

soil

Save an AI chat's working state, load it in any other model or provider. Verified, secret-safe.

pokes

Poke your human for approvals and decisions during agent sessions — answered with one phone tap.

mcp

Upload any file, get a tracked shareable link. DocSend for AI agents.

travel-mcp-server

Booking.com, Airbnb, TripAdvisor unified — for AI travel concierges and trip planners.

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pdf-to-markdown

Hosted MCP server: convert PDFs to clean, LLM-ready Markdown with tables, formulas and OCR.

jp-calendar

Japanese holiday and business-day calculations using official Japan Cabinet Office data.

postproxy

Publish, schedule, and manage social media posts across major platforms via the Postproxy API.

email

Email infrastructure for AI agents — send, receive, search, and reply to email over MCP.

pullboard

Coordination board for AI agents: atomic claims, no self-verification, independent verify-gate.

rmcp

Search remote Model Context Protocol servers and tools discovered by BuiltWith, without an API key.

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mcp

Lightning trust + audit oracle. Score, pay, and audit L402 endpoints with Ed25519 receipts.

repofold

A cited wiki of your GitHub repo: search, read pages, find symbols and ask, with line citations.

portfolio

Cameron Rye's blog, projects, resume, and live site stats, plus contact and newsletter tools.

prismhr-mcp

Open-source MCP server for PrismHR. PEO workflow tools + Microsoft 365 connectors.

local-ydb-mcp

Operate local-ydb deployments through local or SSH-backed MCP tools.

youtube-media-mcp-server

YouTube video search with transcript extraction as first-class output.

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factory-search

Search 4.8M verified Chinese factories: profiles, contacts, AI deep-dives, agentic sourcing.

thousand-api

Certainty for AI Agents. Deterministic MCP tools for dates, crypto, finance. 84 tools.

pdfrender

HTML-to-PDF MCP server — render pixel-faithful PDFs from HTML.

harness-mcp-server

MCP server for Harness API integration

pntr

Free developer subdomains with DNS, catch-all email, and webhook capture, managed via MCP.

data-dictionary

Structure-only reference for the vanilla Ross ERP 8.0 schema, UI menu tree, and program catalog.

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repowise

Codebase intelligence for AI coding agents — graph, git history, docs, decisions, code health.

social

Post, schedule and read analytics on X, LinkedIn, Instagram, TikTok, YouTube, Bluesky and more.

hmr

Docs for hot-module-reload and reactive programming for Python (`hmr` on PyPI)

mcp

The official Svelte MCP server providing docs and autofixing tools for Svelte development

tango

MCP access to the U.S. federal procurement graph: contracts, opportunities, entities, and more.

canvas

Public canvas where verified AI agents claim permanent image blocks to advertise services.

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mcp

Your hosted Timill instance: query and edit your work-platform data with full per-user RBAC.

lead-intelligence

Pay-per-call lead intelligence tools with free MCP discovery and x402 payments.

us-brand-intelligence

Pay-per-call US brand evidence and signal workflows with free MCP discovery and x402 payments.

tinysend

Email for agents: newsletters, subscribers, contacts, broadcasts. OAuth sign-in, no API key.

intelligence-gateway

Unified MCP gateway to Algeria TKAWEN ecosystem: commerce, certification and AI tools.

tomesphere

Search 8.5M scientific papers with LLM TLDRs, citations, linked entities, figures, and full text.

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aws-cloud-cost-sentinel

Read-only AWS cost analysis: find idle and underutilized resources, with evidence.

sec-edgar-mcp

Normalized SEC EDGAR fundamentals. 3 of 6 tools free; the rest $0.04-$0.10 per call in USDC.

toolfound

Agent-native launch platform and tool directory: search, alternatives, trending, launch via MCP.