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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

webhook

Send, validate, debug webhooks for AI agents

health-bridge

Apple Health AI Bridge provides read-only local MCP access for Health Bridge for AI.

arcwall-security

Security scanning for AI coding tools. Detects secrets, threat models, and runs pre-commit checks.

grantsonar

Search verified-open US grants (federal, state, foundation). Read-only MCP for AI agents.

seedance2video-mcp

Create AI videos with Seedance 2.0 by text to video, text to image, image editing, and image to

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wordcast-mcp

WordCast is a browser-based text-to-speech reader that runs entirely on-device using the Web Speech

openpost

Manage social publishing workflows through OpenPost

color

Color convert, palette, contrast checker for AI agents

env

Dotenv parser, ports, system info for AI agents

lint

Style check, naming, complexity analysis for AI agents

regex

Regex test, explain, replace patterns for AI agents

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web

Web scraping, search, monitoring, and HTML-to-markdown for AI agents

rendercheck

Check generated audio, video and stills for defects. Returns a verdict, not more media.

mcp-ml-lab

Run end-to-end ML experiments from natural language (XGBoost, LightGBM, Optuna).

agentpay

Budget-capped x402 payments for AI agents: verifiable receipts, trust routing, 17 free tools.

osc-bridge

OSC ↔ MIDI bridge — 849 synthesizers and DAWs. A MIDI MCP and OSC MCP for controlling them.

flstudio-mcp

Control FL Studio with Claude: in-DAW mixing, diagnosis, routing, and composition.

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letmepost

MCP server for letmepost.dev. Publish across 8 social platforms from any agent.

vuln-intel

Hosted CVE + bug-bounty-mechanic MCP: exploitation-first ranking, CVE fact-check, mechanic transfer

pixelvault

AI-native marketplace for pre-cleared licensed media assets — search, license, and stream rights.

mcp-orchestrator

Aggregates tools from multiple MCP servers with unified BM25/regex search and deferred loading.

elevenlabs-mcp

RunAPI MCP server for ElevenLabs: create tasks, poll status, check pricing.

runcomfy-mcp

Remote MCP server for RunComfy Serverless API (ComfyUI): deployments and async inference.

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mcp-real-estate-server

Dutch real estate data with KRK Makelaars report generation.

memory-os-ai

Adaptive memory for AI agents — FAISS search, chat extraction, cross-project linking

vivarium

A science game for AI agents: tune, infer, or out-evolve a living world, judged on held-out seeds.

comos-federation

Multi-tenant MCP gateway for AI commerce. One connection, every store.

rsk-mcp-server

MCP Server for Rootstock Blockchain

gatewards

Drop-in spend governance + cross-agent dedup proxy for AI agent fleets, with x402 settlement.

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ideogram-v3-mcp

RunAPI MCP server for Ideogram V3: create tasks, poll status, check pricing.

ace-memory

Persistent memory for AI agents. Semantic search, memory graph, W3C DID identity.

agentic-wallet-guardian-v3

Explainable ALLOW/WARN/BLOCK risk decisions for AI agent actions before execution, signed as OAA.

gpt-4o-image-mcp

RunAPI MCP server for GPT-4o Image: create tasks, poll status, check pricing.

wan-mcp

RunAPI MCP server for Wan: create tasks, poll status, check pricing.

runframe-mcp-server

MCP server for Runframe incident management covering incidents, on-call, postmortems, and more.

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midjourney-mcp

RunAPI MCP server for Midjourney: create tasks, poll status, check pricing.

cannabis-regulatory

Cannabis compliance: US state testing, INCB, Health Canada, EU precursors. Free.

cosmetic-regulatory

Cosmetic safety: NOAEL, MoS, SCCS, 12 jurisdictions. 30K ingredients. Free.

fixme-agent

Real-time AI code quality — 30 validators, 17 languages, 813+ checks

grounder

Web grounding for local & cloud LLMs: search, fetch, token-capped evidence packs, and research.

cli

Multi-site analytics as tools: GA4, Search Console, Cloudflare edge, PageSpeed, insights.

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polymarket-toolkit

Read-only Polymarket data tools for AI agents: profiles, PnL, market scans. No keys, no orders.

hermes-grocy-mcp

MCP server for Grocy household ERP inventory and shopping workflows.

memory-vault

Local-first AI memory layer with hybrid search. Postgres + pgvector. Self-hosted, MIT.

grok-imagine-mcp

RunAPI MCP server for Grok Imagine: create tasks, poll status, check pricing.

claude-flow

AI orchestration with hive-mind swarms, neural networks, and 87 MCP tools for enterprise dev.

triggercmd

Run commands on your computers remotely with TRIGGERcmd.

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multimodal

Multi-provider media generation — images, video, audio, and transcription via a unified interface

verimcp

Transparent MCP proxy that independently re-verifies tool-call claims before the Host trusts them.

kci-openapi-mcp

KCI (Korea Citation Index) literature & citation search via REST Open API + OAI-PMH