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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

askais-mcp

Generate professional receipt PDFs and structured receipt data with AI-ready MCP tools.

mcp-server-raygun

Investigate errors, track deployments, analyze performance, and manage application monitoring

ai-site-scorer

Check website AI-readiness: Schema.org, llms.txt, E-E-A-T, robots.txt. Works in Cursor & Claude.

noderooms-discovery

Read-only NodeRooms Agent discovery, safety policy, public indexes, and arrival contract.

agent-canvas

Local MCP canvas for Modellix image generation, editing, task recovery, and visual project work.

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national-parks-mcp-server

Plan US National Park Service trips — parks, alerts, campgrounds, things to do, events.

constants

One workspace of tools for Claude and ChatGPT: connect 600+ apps, generate media, build tools.

validation-mcp-server

Validate Ethereum addresses, keys, checksums, keccak256 hashes, function selectors, ENS

mdma

MCP server for MDMA — exposes spec, prompts, docs, and package metadata to AI assistants.

propelagent

AI agent platform: manage leads, conversations, bots, calendar and CRM via MCP.

bountyverdict

Read-only GitHub bounty, agent harness, Actions failure, flake, and MCP tool-drift decisions.

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dintak-mcp-gateway

Semantic job search, posting, and apply for Dintak, with resume-to-job match scoring.

context-foundry

Recursive Claude spawning for autonomous project builds with self-healing test loops

site-rep

Read-only Site Rep handoff: agent brief, pending work, first-customer receipt with payment evidence.

mcp-multi-poc-beta-script

PoC Q5b: run a differently-named console script via a positional runtimeArgument.

zwitchy-store

Travel eSIM catalog: search plans, check availability, and get exact quotes with checkout links.

mcp-server-vivino

Vivino wine data for AI assistants: search, explore, wine details and meal-aware recommendations

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logic-pro-mcp

Local MCP server for stateful, fail-closed Logic Pro control and live project readback.

engram-cc

Universal AI coding assistant memory — session handoff, SLM compression, and semantic retrieval.

flipcoin

Agent-first prediction markets on Base. Trade, quote, create markets via MCP.

plsql-mcp

Oracle MCP with PL/SQL analysis, lineage, SAST, and change-impact tools.

agentcanary

Retired compatibility stub for AgentCanary MCP. Daily briefs continue on X and Telegram.

hvac-btu-heat-klimaanlage

BTU sizing, AC window-seal length, heatwave outlook & running costs for rooms (Germany/EU).

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conduit

Headless browser with SHA-256 audit trails and Ed25519-signed proof bundles for AI agents.

ai-l10n-mcp

MCP Server that turns your AI agent into a localization expert with token-efficient i18n translation

agentguard

Network-egress firewall for agent tools: check URLs against a declarative policy.

update-hijack-demo

Demo: Server update hijack PoC (clean copy for video)

qnevt

Verifiable random decisions, audit sampling, fair selection, and proof verification using QnEvt.

omni-oracle

Agent-First Data Bazaar. 136 Tools for DeFi, Derivatives, Governance, Alpha & Utilities.

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consultkit

AI-powered consulting tools for proposals, client management, and business development.

toolradar

Search, compare, and get pricing for 8,600+ software tools with verified data.

lossless-context-mcp

Agent context flight recorder: restore after compaction, fan-out packs, signed git-bound receipts.

engedi

93 tools: finance, weather, news, travel, knowledge, SEO. 27 free + 66 paid via USDC x402.

neodemos

Source-anchored search and civic intelligence for Dutch municipal council records.

agentfit

Token-aware message truncation: fit a chat history into your model's context budget.

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qaradar

Tells AI agents which files to test first — churn, coverage, and test mapping as risk scores.

getalife-budget

Zero-Based Budgeting tools: budget plans, runway, net worth, savings goals, debt payoff plans.

update-hijack-poc

PoC benign MCP server for update-hijack security research

graphlens-mcp

Semantic code graph MCP server for coding agents

signal-oracle

Pay-per-call change-intelligence feeds for AI agents over x402 (deps, security, regs, tariffs)

chromeflow

Lets Claude Code or Codex CLI drive your real Chrome — sessions intact, 28 browser tools.

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tradetime-mcp

Read-only trading hours for 30 stock exchanges — open now, next open, holidays, sessions.

nimistu-mcp

Estonian Business Register: companies, people, beneficial owners, trademarks. Free, no API key.

noaa-marine-mcp-server

Find NOAA tide stations and NDBC buoys, fetch tide predictions, currents, and live conditions.

mcp

AI-powered application security testing — scan APIs, discover endpoints, and find vulnerabilities.

mftool-mcp

MCP Server for publicly available Indian Mutual Funds data

devops-mcp

An MCP server that provides DevOps and DevSecOps context for the project

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dispatchseo

Open-source SEO manager for coding agents: keyword research, content PRs, rank + Search Console.

nist-nvd-mcp-server

Search and audit NIST NVD CVEs by keyword, severity, CWE, CISA KEV status, and CPE.

n3mc-workingmemory

Ephemeral 7-day hybrid vector+BM25 working memory, multilingual, backed by Redis Stack.