Your first request

1. Create a key. In the app: Settings → API Keys → Create. Copy the hk_live_… value - it is shown once.

2. List an exchange’s markets.

   curl "https://rest.haasapi.com/v1/markets?exchange=BINANCE" \
     -H "Authorization: Bearer hk_live_YOUR_KEY"

   One request returns the whole exchange - no pagination needed for the common case:

   {
     "data": [
       {
         "market_tag": "BINANCE_BTC_USDT",
         "exchange": "BINANCE",
         "base": "BTC",
         "quote": "USDT",
         "market_type": "spot",
         "price_step": "0.01",
         "min_order_value": "5",
         "is_open": true,
         "contract": null
       }
     ],
     "next_cursor": null
   }

   Fields are abbreviated above - a real market row also carries price_decimals, amount_step, amount_decimals, maker_fee, taker_fee, min_order_amount, max_order_amount, and max_order_value. See the full shape in the reference.

3. Keep the market_tag. It is the market’s identifier everywhere in the API - copy it from responses and pass it back. Don’t build or parse it yourself; the structured fields (exchange, base, quote, contract) carry the components. Why?

What’s available today

The API ships in stages. Live now: market data (markets and exchanges). Rolling out: bots, backtests, labs, scripts, accounts and wallets. The reference documents the full v1 surface - generated from the code that serves it - and each endpoint answers as its stage ships; a call to one that has not shipped yet returns 404 not_found.