A Claude skills marketplace sells skill files: small ZIP folders with a SKILL.md inside that tells Claude how to do one job properly. You upload one in the Claude desktop app under Customize → Skills, switch it on, and Claude works like that specialist until you switch it off. Install takes about three minutes. KissMySkills currently stocks 853 skills, 158 prompt packs and 55 agents; most skills are $14.99.
What is a Claude skills marketplace?
It is a store that sells behaviour rather than software. Nothing installs on your machine, nothing runs in the background, and there is no account to connect. You buy a file, hand it to Claude, and Claude changes how it works.
The comparison people reach for is an app store. It is closer to hiring: you are not adding a feature to Claude, you are giving it a job description, a method, and a standard for what finished work looks like.
What is actually inside a skill file?
Unzip one and there is remarkably little. That is the point.
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SKILL.mdfile at the root of the folder. Plain Markdown. You can open it in TextEdit or Notepad and read every word before you let it near your work. - A short header with a name and a description. The description is the part most buyers ignore and the part that decides everything: it is what Claude checks to know whether this skill applies to what you just asked. A sharp description means the skill fires exactly when you need it. A woolly one means it either never triggers or triggers constantly.
- The method itself. How the role thinks, what it asks before it starts, the order it works in, the format it delivers in, and the things it refuses to do.
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A
resources/folder, on the better packs. Usually an example of finished output, sometimes templates or checklists the skill pulls in when it needs them.
No binaries, no installer, no telemetry. If a marketplace will not show you what is inside before you buy, that is worth noticing.
Why a file beats a prompt you paste every time
A pasted prompt is one message competing with every message that comes after it. Around turn fifteen of a long chat, the careful instructions you wrote at the start are simply older context, and the answers start sliding back toward generic.
A skill sits outside the conversation. Claude re-opens it when the task matches, so the instruction is as loud on message forty as it was on message one. You also stop paying the tax of finding the prompt, pasting the prompt, and re-explaining the three things you always have to re-explain.
Topic clusters, a 90-day editorial calendar, brand voice rules and campaign logic, written out as a method Claude follows on every request instead of a prompt you retype.
View Lena →What can you buy in one?
Four product types, and they are not interchangeable. Live counts from the KissMySkills catalogue:
- Skills — 853 files, $14.99 each. One role, one method. This is the main thing.
- Prompt packs — 158 packs, $9 each. A set of ready prompts for one task. No method, no persona; you drive.
- Agents — 55 files, $32 each. Multi-step workflows that carry a task from brief to deliverable rather than answering one question at a time.
- Bundles. Department or full-catalogue packages. The Everything Bundle is $447.99 for all 55 AI agents.
There is also a free skill if you want to run the whole install once before spending anything.
How do you install a skill?
Two routes. The first is the native Claude feature; the second works on any assistant and any plan.
Method 1: upload it to Claude
- Open the Claude desktop app and find Customize in the left sidebar.
- Click Skills, then the + button.
- Upload the ZIP. Claude reads the
SKILL.mdat the root and shows you a summary of what it does. - Toggle the skill on in the list.
- Ask for the work. Claude loads the skill when your request matches its description.
This route needs code execution enabled under Settings and then Capabilities, which is available on every plan including Free. In Claude Code, skip the interface entirely and unzip into ~/.claude/skills/<name>/, then run /skills to confirm it loaded.
Method 2: paste it
On a free plan, or in ChatGPT or Gemini, open the SKILL.md, copy everything, and paste it into custom instructions or project instructions. You lose automatic triggering; you keep the method. Full walkthrough with troubleshooting: how to install a Claude skill.
How do you tell a good skill pack from a padded one?
Most disappointing skill files fail the same four ways.
- Read the description line before anything else. "Helps with marketing" will either never trigger or trigger on everything. "Use when writing or reviewing cold outbound email sequences" tells Claude precisely when to wake up.
- Look for a method, not a mood. Plenty of files spend 400 words describing a personality and never say what the thing produces. If you cannot tell what lands on your screen when you use it, neither can Claude.
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Check for an example of finished output. A pack that ships
resources/example-output.mdis showing you the deliverable before you pay. A pack that does not is asking you to guess. - Match it to the job title, not the department. A single "Finance" skill covering FP&A, controllership, treasury and audit is four half-answers. A CFO skill and a controller skill are two right ones.
One job title, four named deliverables: keyword clusters, technical audits, content briefs and competitor gap analysis. You know what comes out before you buy it.
View Serge →Skills, Projects, or a Custom GPT?
They solve different problems and people mix them up constantly.
- A Project is a container for context: your documents, your history, one set of instructions. Right when the work needs to remember your company.
- A skill is a method Claude picks up when the task matches, in any chat, without moving your work into a container. Right when the work needs expertise, not memory.
- A Custom GPT is closest to a skill, but it lives inside ChatGPT and you talk to it instead of your normal assistant. A skill file works in either, because it is just text.
The practical answer is usually both: a Project for the account you are working on, and skills for the crafts you keep needing inside it.
What does it cost?
Skills are $14.99, prompt packs $9, agents $32, and bundles are priced under the sum of their parts. Everything is an instant download, and everything carries a 30-day money-back guarantee. There is no subscription; the file you buy keeps working whether or not you ever come back.
The honest caveat: a skill file does not make a worse model better. It makes a good model consistent. If the underlying answer would have been wrong, a skill will give you the same wrong answer in a tidier format.
In summary:
A skill file is a readable Markdown document that gives Claude one job and one method, uploaded through Customize → Skills in about three minutes. For content and campaigns start with Lena — Content Marketing Manager; for rankings and audits, Serge — SEO Specialist. Both are $14.99, work in Claude, ChatGPT or any AI chat, need no coding, and come with a 30-day money-back guarantee.
Find your Claude skill by role
These role guides break down which skills fit each job, with links to every collection:
- AI marketing skills — strategy, content, SEO, email and ads.
- AI sales skills — outreach, discovery, objections and proposals.
- AI coding skills — review, debugging, documentation and DevOps.
- AI finance and legal skills — analysis, budgeting and contract review.
- AI business skills — operations, strategy, project management and reporting.
- AI content and creative skills — articles, scripts and social.
Or browse the whole catalogue and buy instantly: all Claude skills by role.