Claude can be upgraded with add-ons, the same way you add apps to your phone. There are 3 kinds, and almost everything you will ever install is one of them. Once you have these 3 down, the rest follows.
Plug-in = a whole crew in one install. Think of it like hiring a full team with a single click. One command adds a bundle of related tools at once (a whole dev team, or a whole marketing team), instead of you adding them one by one. Everyday analogy: ordering the full meal-deal instead of picking every item off the menu.
Skill = a single shortcut. It is one short instruction file that teaches Claude a workflow you would normally have to type out from scratch every single time. You install it once, then trigger it with a quick command. Everyday analogy: a saved recipe card. You do not re-explain how to make the dish, you just say "make that one."
MCP server = a connector. MCP stands for Model Context Protocol. It is the bridge that plugs Claude into your real apps and data (like Notion, Slack, or your calendar) so it can actually read and do things in them, live, not just talk about them. Everyday analogy: the charging cable between your phone and your laptop. The two were always separate, the cable lets them actually pass things back and forth.
You will reuse these 3 patterns for everything below, so here they are up front. Most run inside Claude Code (Claude's coding app, free with your Claude plan), and a couple run in the regular Claude app.
To install a plug-in, you add its marketplace (the shelf it lives on), then install it. Two lines:
/plugin marketplace add <github-owner/repo>
/plugin install <plugin-name>@<marketplace-name>To install a skill, the easiest way is to open a chat in Claude and paste the GitHub link, and it sets itself up:
Please install this Claude skill for me. The SKILL.md file is in this GitHub repo: <repo link>In the Claude web or desktop app you can also go to Customize, then Skills, hit Add, choose Upload a skill, and drag the file in.
To install an MCP server (a connector), the friendliest way is in the Claude app: click your profile, then Customize, then Connectors, then Browse connectors, and connect the one you want (Notion, Slack, and more are one-click there). The power-user way, in Claude Code, is one line:
claude mcp add --transport http <name> <server-url>Now here are all 24, in the same 3 buckets from the carousel.
These each add a bundle of tools in one go. Install pattern is always the same two lines from above.
1. marketingskills ⭐ start here
What it is: a pack of marketing skills (CRO, copywriting, SEO, analytics, ads, social, growth) in one install.
Why it helps: it is the closest thing to a full growth team living inside Claude. My number one pick for anyone doing marketing.
How to install:
/plugin marketplace add coreyhaines31/marketingskills
/plugin install marketing-skills2. social-media-skills
What it is: a content pack that writes posts, threads, carousels, and captions across platforms.
Why it helps: turns Claude into a content engine for LinkedIn, X, Instagram, and more, in your voice.
How to install:
/plugin marketplace add charlie947/social-media-skills
/plugin install social-media-skills3. gstack
What it is: a bundle of 20+ specialist developer tools, basically a full dev team in one command.
Why it helps: if you build things, this is a whole crew of helpers added at once instead of hunting for them individually.
How to install: add its marketplace, then install the plug-in, using the standard two-line plug-in pattern from above (search "gstack claude code plugin" for the exact owner/repo, then /plugin marketplace add it).
4. superpowers
What it is: a complete development method with composable skills built in, by obra.
Why it helps: gives Claude a structured, repeatable way to plan and build, not just wing it.
How to install:
/plugin marketplace add obra/superpowers-marketplace
/plugin install superpowers@superpowers-marketplace5. codex (codex-plugin-cc)
What it is: OpenAI's official plug-in that lets you run their Codex coding model from inside Claude Code.
Why it helps: you get a second AI brain for code review and delegating tasks, without leaving Claude. Use the real install string below, not just "codex," or it breaks.
How to install:
/plugin marketplace add openai/codex-plugin-cc
/plugin install codex@openai-codex/reload-plugins and /codex:setup. (Needs Node.js 18.18+ and a ChatGPT login or OpenAI key.)6. financial-services
What it is: a pack of finance workflows (investment banking, equity research, wealth management).
Why it helps: ready-made finance tooling if that is your world, no setup from scratch.
How to install: add its marketplace, then install the plug-in, using the standard two-line plug-in pattern above. Check the official directory inside Claude Code (/plugin marketplace) for the current source.
7. claude-for-legal
What it is: legal workflows covering common practice areas.
Why it helps: drops in legal-specific structure so Claude is useful for legal work out of the box.
How to install: add its marketplace, then install the plug-in, using the standard two-line plug-in pattern above.
8. claude-skills
What it is: a big community pack of ready-made skills, installed in one go.
Why it helps: instead of adding skills one at a time, you get a whole library at once and pick what you use.
How to install: add a community claude-skills marketplace, then install the pack, for example:
/plugin marketplace add jezweb/claude-skills
/plugin install <skill-name>@jezweb-skillsEach of these is a single shortcut you install once. The easiest install for any skill is to paste its GitHub repo link into Claude and ask it to install (the pattern from up top).
1. frontend-design ⭐ everyone's favourite
What it is: a skill that kills the generic AI look and makes interfaces actually have taste.
Why it helps: anything Claude builds instantly looks more designed and less like a default template. The taste fixer.
How to install: it is in Anthropic's official plug-in directory, so inside Claude Code open /plugin, find frontend-design in the official marketplace, and install it. (Or search "frontend-design claude plugin" for the repo and paste it in.)
2. humanizer
What it is: a skill that strips the robotic tells out of AI writing.
Why it helps: your drafts stop sounding like a bot, no more giveaway phrasing and stiff rhythm.
How to install: paste the repo into Claude, for example blader/humanizer:
Please install this Claude skill for me. The SKILL.md file is in this GitHub repo: https://github.com/blader/humanizer3. ai-second-brain
What it is: a skill that turns your AI chat history into a personal, searchable wiki.
Why it helps: all those one-off chats stop disappearing and become a knowledge base you can actually pull from.
How to install: find the skill's GitHub repo and paste the link into Claude using the skill-install pattern above.
4. notebooklm-skill
What it is: a skill that lets Claude search your own research and notes.
Why it helps: Claude answers from your material, not just its general training, so it is grounded in your actual sources.
How to install: find the skill's GitHub repo and paste the link into Claude using the skill-install pattern above.
5. claude-seo
What it is: a skill that helps your content get found, and now get quoted by AI search tools, not just ranked on Google.
Why it helps: SEO has changed. This optimises for the AI answers people now read instead of clicking links.
How to install: find the skill's GitHub repo and paste the link into Claude using the skill-install pattern above.
6. hyperframes
What it is: a skill that writes HTML and renders it into a video, built for agents.
Why it helps: lets Claude produce simple motion graphics and animated frames from code.
How to install: find the skill's GitHub repo and paste the link into Claude using the skill-install pattern above.
7. doc skills
What it is: Claude's official pack for making real Word, PDF, Excel, and PowerPoint files.
Why it helps: you get actual downloadable documents, not just text in a chat window.
How to install: it is in Anthropic's official directory, so inside Claude Code open /plugin and install the document skills, for example:
/plugin install document-skills@anthropic-agent-skills8. caveman
What it is: a fun skill that makes Claude answer in short caveman-speak.
Why it helps: ultra-short replies use fewer tokens, so it is a cheeky way to save usage when you just want the answer.
How to install: find the skill's GitHub repo and paste the link into Claude using the skill-install pattern above.
These plug Claude into apps you already use. The friendliest install for most is the Claude app: Customize, then Connectors, then Browse connectors. The power-user one-liner is claude mcp add in Claude Code.
1. notion ⭐ start here
What it is: a connector that reads and writes your Notion databases and docs.
Why it helps: Claude can actually run your workspace, update trackers, draft pages, pull info, not just chat about it.
How to install (power-user one-liner):
claude mcp add --transport http notion https://mcp.notion.com/mcpOr in the Claude app: Customize, then Connectors, then add Notion.
2. slack
What it is: a connector that reads channel history and posts updates.
Why it helps: Claude can catch up on a channel and post for you, so it works where your team already talks.
How to install: in the Claude app go to Customize, then Connectors, then Browse connectors, and add Slack. (Or add its remote server with claude mcp add --transport http slack <server-url> from the connector's docs.)
3. granola
What it is: a connector that feeds all your Granola meeting notes into Claude.
Why it helps: every meeting becomes searchable context, so Claude can summarise and act on what was said.
How to install: connect it from Customize, then Connectors in the Claude app, or add its server URL with claude mcp add --transport http granola <server-url> from Granola's MCP docs.
4. zapier
What it is: one connector that wires Claude to thousands of apps and actions.
Why it helps: if an app is not on the connectors list, Zapier is usually the bridge. One wire, huge reach.
How to install: create your Zapier MCP endpoint at zapier.com, then in the Claude app go to Customize, then Connectors, then add Zapier and paste the URL it gives you.
5. perplexity
What it is: a connector that adds live web search inside Claude.
Why it helps: Claude can pull current information mid-task instead of being limited to what it already knows.
How to install: add Perplexity from Customize, then Connectors in the Claude app, or add its server with claude mcp add --transport http perplexity <server-url> from Perplexity's MCP docs.
6. context7
What it is: a connector that feeds Claude the latest real documentation for the tools you are coding with.
Why it helps: Claude's code stops being out of date, it writes against current docs, not last year's.
How to install:
claude mcp add --transport http context7 https://mcp.context7.com/mcp--header "CONTEXT7_API_KEY: YOUR_KEY" if you want higher limits.)7. higgsfield
What it is: a connector to 30+ image and video models (Kling, Veo, Seedance) from one place.
Why it helps: generate visuals and video from inside Claude without juggling a bunch of separate tools.
How to install: connect it from Customize, then Connectors in the Claude app, or add its server URL with claude mcp add --transport http higgsfield <server-url> from Higgsfield's MCP docs.
8. agent-browser
What it is: a connector that lets Claude click around a real website for you.
Why it helps: Claude can navigate and pull things from sites that do not have a tidy connector, without slowing down.
How to install: add its server with claude mcp add from the agent-browser project's docs (follow the stdio or http command they list), or connect it from Customize, then Connectors if it appears there.
No need to do all 24. If you are new to this, set up these 3 and you have one strong pick from each bucket:
/plugin marketplace add coreyhaines31/marketingskills
/plugin install marketing-skills/plugin directory inside Claude Code.claude mcp add --transport http notion https://mcp.notion.com/mcp