Cryptocurrency REST API: Bitcoin REST API for Crypto Prices & Market Data

Learn how to leverage our Cryptocurrency REST API to manage trades, access real-time market data, and integrate Bitcoin and other crypto prices into your applications. This guide covers both public and private API calls, ensuring you have the tools needed for seamless cryptocurrency trading and data analysis.

Table of Contents

• Public API Calls
• Private API Calls
• Definitions
• FAQs

Public API Calls

Public API calls provide access to market data without authentication. Below are the key endpoints:

Currency Limits

Retrieve trading limits for all currency pairs.

**Endpoint**:  
`GET https://cex.io/api/currency_limits`

**Response**:  
- `pairs`: List of currency pairs with limits (e.g., min/max price, lot size).

Ticker

Get the latest market summary for a specific pair (e.g., BTC/USD).

**Endpoint**:  
`GET https://cex.io/api/ticker/{symbol1}/{symbol2}`

**Response**:  
- `bid`: Highest buy order.  
- `ask`: Lowest sell order.  
- `last`: Last traded price.  
- `volume`: 24-hour trading volume.

Orderbook

Fetch the current order book for a trading pair.

**Endpoint**:  
`GET https://cex.io/api/order_book/{symbol1}/{symbol2}`

**Parameters**:  
- `depth`: (Optional) Number of orders to return.

**Response**:  
- `bids`: Buy orders.  
- `asks`: Sell orders.  
- `timestamp`: UNIX timestamp.

👉 Explore advanced trading strategies

Private API Calls

Private calls require API key authentication and are used for account management and trading. Key endpoints include:

Account Balance

Retrieve your account balance across all supported currencies.

**Endpoint**:  
`POST https://cex.io/api/balance/`

**Parameters**:  
- `key`: API key.  
- `signature`: HMAC-SHA256 signature.  
- `nonce`: Unique request ID.

**Response**:  
- `available`: Funds available for trading.  
- `orders`: Funds locked in open orders.

Place Order

Submit a new buy/sell order.

**Endpoint**:  
`POST https://cex.io/api/place_order/{symbol1}/{symbol2}`

**Parameters**:  
- `type`: Order type (`buy`/`sell`).  
- `amount`: Order quantity.  
- `price`: Order price.

**Response**:  
- `id`: Order ID.  
- `status`: Order status.

Cancel Order

Remove an active order.

**Endpoint**:  
`POST https://cex.io/api/cancel_order/`

**Parameters**:  
- `id`: Order ID to cancel.

**Response**:  
`true` if successful.

Definitions

FAQs

How do I get an API key?

Navigate to Account > API Access on CEX.IO, generate a key, and set permissions.

What is the rate limit for API calls?

The default rate limit is 600 requests per 10 minutes.

How do I handle API errors?

Check the error field in responses. Common issues include invalid nonce or authentication failures.

👉 Learn more about API best practices

This guide ensures you can efficiently integrate our API into your projects while maintaining security and performance. For further details, refer to the official CEX.IO API documentation.

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