Claude skills for trading: what they are and how to install them

Updated 15 October 2026 · 7 min read

A "skill" is a folder of instructions (and optionally scripts) that teaches an AI agent one job, such as preparing an earnings brief or checking a backtest. Here's how they work, where they run and how to install one safely.

What is a Claude skill?

A skill is a folder with a file called SKILL.md. The file starts with a short header containing a name and a description, followed by step-by-step instructions. The folder can also hold scripts, reference notes and templates. The format is an open standard published at agentskills.io, so the same folder can work in several tools.

The agent first sees only each skill's name and description. When your request matches a description, it loads the full instructions. That keeps the agent focused and means you can install many skills without cluttering every chat (OpenAI describes the same "progressive disclosure" model).

earnings-pre-brief/
├── SKILL.md            ← name, description, step-by-step instructions
├── scripts/            ← optional code the agent can run (e.g. fetch SEC filings)
├── references/         ← optional rules or background
└── assets/             ← optional output templates

Where skills work (October 2026)

Tool	How to add a skill	Source
Claude (web, desktop, mobile)	Turn on Code execution and file creation in Settings → Capabilities, then Customize → Skills → + → Create skill → Upload a skill (a .zip with the skill folder at its root).	Claude Help Center
Claude Code	Copy the folder to ~/.claude/skills/ (all projects) or .claude/skills/ (one project).	Claude docs
Cursor	Copy to ~/.cursor/skills/ or .cursor/skills/; run it with /skill-name or let the agent pick it.	Cursor docs
Codex (CLI, IDE, ChatGPT desktop)	Copy to ~/.agents/skills/ or .agents/skills/ in a repo; mention it with $skill-name.	ChatGPT Learn
ChatGPT	Skills are available to eligible Business, Enterprise, Healthcare and Edu users (Create → Upload). On other plans, paste the SKILL.md text into a chat or a Project.	OpenAI Help Center

These menus change often. If a step doesn't match, check the linked page.

Skills that are actually useful for traders

Skills are best for repeatable homework where the steps matter more than an opinion:

• Earnings prep: pull the latest earnings release and any guidance updates, then lay out last quarter's numbers, the current guidance and questions to listen for.
• Filing lookups: find the latest 10-K, 10-Q, 8-K or Form 4 insider filings and explain what each one is.
• Backtest review: check a trade log for look-ahead bias, impossible fills, missing costs and overfitting.
• Journaling: turn a broker CSV into a weekly review of your own rules and mistakes.

Skills are a poor fit for anything that needs live prices you haven't given the agent, and for "what should I buy?" questions. A good trading skill should refuse to answer those.

How to install your first skill

1. Download a skill folder, for example from the free TapeSkills trader-skills repo (MIT licence).
2. Read the SKILL.md and any scripts before installing. Anthropic's guidance is to install custom skills only from trusted sources and review what they do (Claude Academy).
3. Copy the folder into the location for your tool (table above), or zip it and upload it to Claude.
4. Ask for the task in plain words, e.g. "show NVDA's latest SEC filings". The agent should say it's using the skill.
5. If it doesn't trigger, call it by name (/sec-filing-finder in Cursor, $sec-filing-finder in Codex).

A 60-second safety check for finance skills

• Where does the data come from? Prefer skills that name their sources (e.g. SEC EDGAR) and link every number.
• Does it run code? Look in scripts/. Check which websites it contacts and that it never asks for broker passwords or API keys it doesn't need.
• Does it give advice? A skill that hands out price targets or "buy" calls is a red flag, both for accuracy and for regulation.
• Was it tested? Look for sample outputs on real companies and a note on what was checked.

Free and paid options

Free collections exist on GitHub, for example tradermonty/claude-trading-skills (MIT) and Anthropic's financial-services repo (Apache-2.0), which is aimed at finance professionals. Paid packs are sold on marketplaces and creator stores. Whatever the source, use the safety check above.

Our own: the free Backtest Sanity Checker and SEC Filing Finder, and the Earnings Prep Pack for one-page earnings briefs.

FAQ

Do skills give Claude live market data?

Only if the skill includes a script or tool that fetches it and your environment allows internet access. Otherwise the agent works with what you paste in.

Are Claude skills the same as MCP servers?

No. MCP connects an agent to an outside service (a database, an API). A skill is instructions and files that teach the agent how to do a task. They can work together.

Can a skill trade for me?

A skill could include code that calls a broker API, but that's a big risk. Our skills only read public data and never place orders.

Educational content, not investment advice. See our disclaimer.