KuCoin API

Cryptocurrency / API Key Intermediate HTTPS
Varies by plan (check documentation)

Overview

KuCoin is a global cryptocurrency trading platform API offering access to hundreds of spot, margin, and futures trading pairs. Its public endpoints return real-time ticker data, candlestick charts, and order book snapshots without requiring authentication, while private endpoints support order placement and portfolio management. KuCoin is popular for its wide altcoin selection and developer-friendly documentation.

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Beginner Tip

Public market data endpoints on KuCoin require no API key; start with the /api/v1/market/allTickers endpoint to retrieve price data for all trading pairs in a single call to understand the data structure.

Available Data

coin price in USD/EUR
market capitalization
24h price change
trading volume
circulating supply
stock price and symbol

Example Response

JSON Response
{
  "id": "bitcoin",
  "symbol": "btc",
  "current_price": 65432.1,
  "market_cap": 1280000000000,
  "price_change_24h": 1250.5,
  "price_change_percentage_24h": 1.95,
  "total_volume": 28500000000
}

Field Reference

data.price Current market price of the trading pair.
data.bestBid Best available bid price in the order book.
data.bestAsk Best available ask price in the order book.
data.size Quantity available at the best bid price.
code Response code; "200000" indicates success, other codes indicate errors.
data.time Timestamp in milliseconds when the order book snapshot was taken.

Implementation Example

const url = "https://docs.kucoin.com/";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

400002 (Invalid Parameter) The trading symbol format is wrong; KuCoin uses uppercase letters with a hyphen separator.
Use the format "BTC-USDT" (uppercase, hyphen-separated) for all symbol parameters.
400003 (API Key Error) The API key, secret, or passphrase is missing or does not match the account.
KuCoin private endpoints require three credentials: the API Key, Secret, and a Passphrase you set when creating the key.
429 Too Many Requests Exceeding KuCoin's rate limits, which are 1800 requests/minute for public and 1200/minute for private endpoints.
Add retry logic with exponential backoff, and consider using KuCoin's WebSocket feeds for real-time data.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 12/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS UNKNOWN
Category Cryptocurrency
Difficulty Intermediate
Verified: 2026-04-07

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