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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

delx-agent-utilities

Stateless URL, DNS, x402, JWT, encoding, and parsing tools for AI agents.

mcp-rfc-editor

An MCP server that provides rfc editing capabilities

wellness-air

Local-first air-quality MCP for AI agents — AirGradient, AirThings, PurpleAir, IQAir, Awair.

dazzle

Cloud stages for AI agents and live streaming. Create, manage, and broadcast content.

hashloom

Content-addressed contracts and a verification cache that cut agent context by skipping proven code.

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stellify-mcp

Build Laravel apps through conversation. Code stored as structured JSON for surgical AI edits.

hokmah

AI Agent with Architectural Memory. Impact analysis (free), tests and code from the graph (pro).

purl

Search and save to your Purl read-it-later knowledge base from any MCP client.

agent-browser

MCP server for browser automation via Vercel's agent-browser CLI

percept

Give your AI agent ears — ambient voice intelligence with 8 MCP tools for Claude Desktop

gpt-chat

MCP server for the OpenAI ChatGPT API — chat, vision, and embeddings

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mcp-scorecard

Agent-readiness scorecard for any MCP server: 10 checks, 0-100 score, actionable findings.

gpt-image

MCP server for OpenAI GPT image generation and editing

pexels

MCP server for Pexels — search photos and videos, and browse collections

tieline

Static FE-BE contract-drift checker: finds frontend calls the backend does not expose. CLI + MCP.

ask-ollama

Bridge Claude with local Ollama LLMs for private AI-to-AI collaboration — no API keys, fully local

katzilla

300+ free public & government data sources behind one API key, for AI agents.

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codegraph

Semantic code graph with 31 tools: callers, impact, complexity, unused code. 15 languages.

grok-chat

MCP server for the xAI Grok API — chat, vision, search, and embeddings

semi-data

US-government semiconductor & quantum supply-chain intelligence: controls, entities, funding.

uap-pulse

Search and map the Pentagon UAP/UFO releases plus curated official archives from 12 nations.

wellness-nourish

Local-first nutrition MCP for AI agents: food, barcode, photo, intake, hydration, goals.

univercity-mcp

8-dimension business diagnosis with Revenue Leak Score and triple-option recommendations

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mcp-eval-runner

A standardized testing harness for MCP servers and agent workflows

capsule

Compact, source-linked context packs that reduce token waste for coding agents.

vedavisor-vedic-astrology-mcp

Professional Vedic astrology tools for AI agents via MCP.

mcp-second-brain

Self-maintaining knowledge vault: figure-level search, auto-wikilinks, and memory compression.

graylog-mcp

Query logs from Graylog: get streams, search messages, aggregate, and get full data.

oasdiff

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

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nexsus

Private persistent memory for Claude, ChatGPT & Gemini via MCP - semantic search, zero-code setup.

mcp-legal-doc-analyzer

Domain-specific MCP tooling for legal document workflows

misterdev

Autonomous LLM build orchestrator that plans, edits, and verifies code across languages.

mcp-server-deapi

35 AI tools for image/video generation, TTS, transcription, OCR & embeddings via deAPI

engram

Persistent memory for AI agents — verbatim conversations, searchable by meaning.

excalidraw

Security-hardened Excalidraw MCP server with auth, rate limiting, and 14 tools

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searchts

Keyless web access for AI agents: read bot-walled pages as Markdown, search, grab assets

worldcastr-remote

Built-environment forecasts, public benchmarks, and permit or zoning readiness through remote MCP.

dynoxide

DynamoDB-compatible database engine in Rust on SQLite, with an MCP server for coding agents.

aiglare

Audit AI/LLM features for governance guardrails: confidence, fallback, validation, human-in-loop.

dingdawg-healthcare-agent

HIPAA-aware healthcare AI. Clinical documentation, compliance checks, audit prep. Free local tier.

agent-spend-policy-mcp

Local agent spend-policy checks. No funds, keys, payment authority, or network access.

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cokodo-agent

Serve .agent/ project context, references, and collaborations to MCP-compatible IDEs.

bouncer

Static compliance-controls checker for UK Online Safety Act & ICO Children's Code. CLI + MCP.

tripitaka-mcp

MCP server for the full Pāli Canon — search, cite, compare translations. Offered as Dhamma Dāna.

mcpampel

Scan installed MCP servers for security vulnerabilities with 16 detection engines.

dcp-mcp

Saudi sovereign AI compute: OpenAI-compatible inference, rent GPU pods, manage storage.

hn-developer-sentiment-mcp

Deterministic Hacker News developer sentiment, themes & feature requests via MCP. No API key.

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dgmo-mcp

Generate 40+ diagram types from text; render locally to SVG/PNG, open in the Diagrammo editor

qacat

Translation QA: automated checks, AI evaluation, linguistic review, and visual in-context testing.

onyx-mcp

Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet.