"Which API should I use?" is the first technical decision when automating — and the wrong answer means rework. The good news: the choice is almost always dictated by the market you want to trade, not by preference. Let's clear it up fast and give you a decision rule.
Binance API
Mature REST + WebSocket APIs, extensive documentation, a free testnet. The world's largest crypto liquidity.
Market: crypto (spot + futures)
Bybit API
Strong in derivatives/perpetual futures. An API similar to Binance, good documentation, a testnet.
Market: crypto (futures focus)
MetaTrader 5
The Python↔MT5 terminal bridge. The path to Forex and futures markets (index, currency).
Market: Forex, futures, stocks
01A direct comparison
| Criterion | Binance | Bybit | MetaTrader 5 |
|---|---|---|---|
| Market | Crypto (spot+fut) | Crypto (futures) | Forex, futures, stocks |
| API type | REST + WebSocket | REST + WebSocket | Terminal bridge |
| Accesses futures? | Crypto only | Crypto only | Yes (via broker) |
| Language | Any (HTTP) | Any (HTTP) | Python (Windows) |
| Free testnet | Yes | Yes | Demo account |
| Needs the terminal open? | No | No | Yes (MT5) |
| Runs on Linux? | Yes | Yes | Not native (Windows) |
| Common library | python-binance / ccxt | pybit / ccxt | MetaTrader5 |
02The CCXT shortcut (crypto)
If you're going to trade crypto and might switch exchanges in the future, get to know CCXT — a library that unifies dozens of exchanges under the same syntax. You write the bot once and it works on Binance, Bybit and others with minimal change:
# same code, different exchanges — just change the line import ccxt exchange = ccxt.binance() # or ccxt.bybit() candles = exchange.fetch_ohlcv("BTC/USDT", timeframe="15m", limit=100) print(candles[-1])
When to use CCXT vs native: CCXT for portability (multi-exchange) and quick prototyping. A native library (python-binance, pybit) when you need exchange-specific features that CCXT doesn't expose, or maximum performance. To start, CCXT is more flexible.
03The decision rule
Simplifying so you don't get stuck:
- Want to trade crypto? → Binance (spot) or Bybit (derivatives). Use CCXT if you want portability. Runs on Linux, no terminal.
- Want to trade Forex? → MetaTrader 5 with Python, via a Forex broker that offers MT5.
- Want to trade index/currency futures? → MetaTrader 5 with Python is the path. There's no crypto shortcut here.
- Want to prototype a strategy visually? → Pine Script + webhook for any of them.
Chosen? Now to the code
We have a complete tutorial for each: Binance and the MT5-Python bridge, with ready-made code.
04Differences that matter in practice
WebSocket vs REST
Binance and Bybit offer WebSocket (data pushed in real time, ideal for reacting fast) and REST (you ask, it answers). For a bot that needs low latency, WebSocket. The MT5 bridge works differently — you query the terminal, which already keeps the data updated locally.
Where it runs
Binance/Bybit run on any server (a cheap Linux box works). MT5 requires Windows with the terminal open — in practice, a Windows VPS. That affects hosting cost and complexity.
24/7 market vs trading session
Crypto trades 24/7 — your bot never "closes." Futures have a defined session (and margin changes overnight). Forex trades 24/5. That changes how you structure the loop and position management.
Honest advice: don't pick the API by "fashion." Pick by the market you understand and want to trade. The best crypto API is useless if your strategy is for index futures. The market defines the tool, not the other way around.
05Frequently asked questions
What's the best API for a trading bot?
It depends on the market. Crypto: Binance (spot) or Bybit (futures), both with excellent REST and WebSocket. Forex and futures: the MetaTrader5-Python bridge. The "best" is the one for the market you want to trade.
What is CCXT?
A Python library that unifies dozens of crypto exchanges under the same syntax. It lets you write a bot that works on Binance, Bybit and others with minimal code change. Great for portability.
Can I automate futures with these APIs?
The Binance and Bybit APIs are crypto-only. For index/currency futures, the path is the MetaTrader5 API with Python, via a broker that offers MT5 with access to those markets. See our specific guide.
WebSocket or REST?
WebSocket for real-time data and low latency (the server pushes updates). REST for point queries (you ask, it answers). Bots that react fast use WebSocket for data and REST to send orders.
Do I need to be a strong programmer?
Intermediate Python handles most of it. The libraries (python-binance, pybit, ccxt, MetaTrader5) abstract the complexity. The bigger challenge isn't the API — it's the strategy logic and risk management.