# Papertrade

> Papertrade is a paper-trading platform for testing AI trading agents. People connect an AI assistant (ChatGPT, Claude, Gemini and others) over MCP, or their own bot over a REST API, give it virtual money in 45 stock markets with the real fees of 172 brokers, and measure how well it trades, live or on replayed past days. Free, no credit card. Virtual money only: nothing reaches a real broker or exchange.

## What it does

- Simulators with virtual capital in any of 45 stock markets: India, US, Canada, Brazil, Mexico, Argentina, Chile, UK, Ireland, Germany, France, Netherlands, Belgium, Portugal, Italy, Spain, Switzerland, Austria, Sweden, Norway, Denmark, Finland, Poland, Czechia, Hungary, Greece, Türkiye, Estonia, Israel, Saudi Arabia, UAE, Qatar, South Africa, Japan, Hong Kong, China, Taiwan, South Korea, Singapore, Malaysia, Thailand, Indonesia, Vietnam, Australia, New Zealand.
- Real fee schedules from 172 brokers and trading apps (for example Robinhood, Zerodha, Interactive Brokers), plus market taxes.
- Live intraday trading on real market prices, or a minute-by-minute replay of any past trading day at up to 120x speed.
- Market, limit, stop-market and stop-limit orders, with stop losses, targets and trailing stops.
- Results reports: net P&L after fees, win rate, profit factor, profitable days (calendar heat map), best and worst trades, and plain-language insights.
- Every action an AI takes is logged with the app that made it, so you can judge its decisions before trusting it with real money.
- People can also trade by hand in the web app.

## Connect an AI

- MCP server (Streamable HTTP, OAuth 2.1 sign-in or a personal API key): https://papertrade.world/api/mcp
- Works with Claude, ChatGPT, Gemini, Grok, Perplexity, Le Chat, Claude Code, Codex, Cursor, VS Code, Windsurf, Antigravity, Gemini CLI and any MCP client.
- Listed in the official MCP Registry as world.papertrade/papertrade.
- [Setup guides for each AI app](https://papertrade.world/docs): step-by-step instructions, the tool list and example prompts.
- [MCP brief for AI agents](https://papertrade.world/docs/prompt): plain Markdown with every tool and its parameters.

## Build with the API

- [REST API reference](https://papertrade.world/docs/api): endpoints, curl/Python/JavaScript examples, errors.
- [API brief for coding agents](https://papertrade.world/docs/api/prompt): plain Markdown an AI coding tool can implement from.

## Guides

- [How to test an AI trading agent before it touches real money](https://papertrade.world/guides/test-ai-trading-agent): Test an AI trading agent safely: give it virtual money, real market prices and real broker fees, then judge it on results after fees over many sessions.
- [How to paper trade with ChatGPT](https://papertrade.world/guides/paper-trading-with-chatgpt): Connect Papertrade to ChatGPT in about two minutes, then ask it to create a simulator, place orders with virtual money and report how it did.
- [How to paper trade with Claude](https://papertrade.world/guides/paper-trading-with-claude): Add Papertrade to Claude as a custom connector, then let Claude create simulators, place paper trades with virtual money and review its results.
- [Backtesting vs paper trading: which one tests an AI trading agent?](https://papertrade.world/guides/backtesting-vs-paper-trading): Backtesting replays fixed rules over history; paper trading makes an agent decide in real time. Here's when to use each for an AI trading agent.
- [How to judge an AI trader: win rate, profit factor and fees](https://papertrade.world/guides/judge-ai-trading-results): Which numbers show whether an AI trading agent is any good: net P&L after fees, profit factor, win rate with average win and loss, and profitable days.

## Who it's for

- Developers and researchers testing AI trading agents and LLM trading strategies before using real capital.
- People who want to practise day trading, including by talking to an AI ("buy 10 TSLA with a stop 2% below").
- Learners who want to try markets in other countries with realistic costs.

## Links

- [Website](https://papertrade.world/welcome)
- [Sign up (free)](https://papertrade.world/signup)
- [Support](https://papertrade.world/support): contact@papertrade.world
- [Privacy policy](https://papertrade.world/privacy)
- [Terms of service](https://papertrade.world/terms)
- [Risk disclaimer](https://papertrade.world/disclaimer): a simulator for education and testing, not investment advice.