# Build on Gemini

> **AI/LLM users:** Fetch the complete documentation index at [developer.gemini.com/llms.txt](https://developer.gemini.com/llms.txt)

Gemini is a regulated cryptocurrency exchange and prediction market trusted by millions of users and institutions worldwide. Our developer platform gives you secure, reliable access to crypto markets through REST APIs, WebSocket APIs, and FIX connections.

## What you can build

- **Trading applications** — Execute orders and manage portfolios
- **Market data tools** — Access real-time prices and order books
- **Portfolio trackers** — Monitor balances and transaction history
- **Prediction market bots** — Trade event contracts programmatically
- **Enterprise solutions** — Integrate crypto into your business

## APIs

### Get market data

Public REST APIs provide:

- Current order book
- Recent trading activity  
- Trade history

### Manage accounts

Private REST APIs enable:

- Place and cancel orders
- View active orders
- Check trading history and volume
- Review available balances

### Trade prediction markets

Prediction Markets API supports:

- Browse events and contracts
- Place and cancel limit orders
- Track positions and order history

## Ready to start?

- [Get API keys →](/authentication/api-key)
- [Explore sandbox →](/get-started/sandbox)
- [Explore prediction markets →](/prediction-markets/getting-started)