Htx/futures Trading

Futures Trading

Place, cancel, modify orders, set TP/SL and trigger orders, and close positions on USDT-M perpetual futures.

WARNING: Extremely high-risk write skill. Perpetual futures use leverage; an erroneous order can cause rapid loss or liquidation. Every action must require manual confirmation before execution.

Authentication and permissions

• API Key needs futures-trade permission
• Some query endpoints only need futures-read permission

Endpoint overview (grouped by function, ~50 endpoints)

Path base /linear-swap-api. cross_ prefix = cross-margin; no prefix = isolated.

1. Place order — write

2. Cancel — write

3. Modify — write

4. TP/SL / trailing stop — write

5. Trigger orders — write

6. Lightning close — write

7. Order query (read)

Order parameters (core)

{
  "contract_code": "BTC-USDT",
  "direction": "buy | sell",
  "offset": "open | close",
  "lever_rate": 10,
  "order_price_type": "limit | post_only | optimal_5 | optimal_10 | optimal_20 | ioc | fok | opponent | lightning",
  "price": "65000",
  "volume": 1,
  "client_order_id": <int64 optional>,
  "tp_trigger_price": "70000",  
  "tp_order_price": "70100",
  "sl_trigger_price": "62000",
  "sl_order_price": "61900"
}

• direction + offset combinations:
  • buy + open = open long
  • sell + open = open short
  • buy + close = close short
  • sell + close = close long
• volume unit: contracts (BTC-USDT 1 contract = 0.001 BTC; check contract_size)

Workflow patterns

Cross-margin BTC perpetual 10x open long 0.1 BTC

# 1. First check contract_size: BTC-USDT = 0.001 BTC per contract
htx-cli futures-market contract-info -p contract_code=BTC-USDT
# 0.1 BTC = 100 contracts

# 2. Place order (open long)
htx-cli futures call /v1/swap_cross_order --auth \
  --body '{
    "contract_code": "BTC-USDT",
    "direction": "buy",
    "offset": "open",
    "lever_rate": 10,
    "order_price_type": "optimal_5",
    "volume": 100
  }' --json

Place TP and SL together (cross-margin)

htx-cli futures call /v1/swap_cross_tpsl_order --auth \
  --body '{
    "contract_code": "BTC-USDT",
    "direction": "sell",
    "tp_trigger_price": "70000",
    "tp_order_price": "70100",
    "tp_order_price_type": "limit",
    "sl_trigger_price": "62000",
    "sl_order_price": "61900",
    "sl_order_price_type": "limit",
    "volume": 100
  }' --json

Close all SOL-USDT positions

# Lightning close (market order)
htx-cli futures call /v1/swap_cross_lightning_close_position --auth \
  --body '{
    "contract_code": "SOL-USDT",
    "direction": "sell"
  }' --json

Cancel all BTC-USDT open orders

htx-cli futures call /v1/swap_cross_cancelall --auth \
  --body '{"contract_code":"BTC-USDT"}' --json

Safety constraints (must read)

Before every order, the AI Agent MUST:

1. Calculate and display:
   • Contract / direction / leverage / contracts / underlying quantity (contracts × contract_size) / order price
   • Estimated margin required
   • Current mark price + deviation from limit price
   • Liquidation price (if computable)
2. Warn about risk: leverage above 5x must explicitly note "high leverage = high liquidation risk"
3. Display the account's current available margin (call futures-account)
4. Wait for the user to explicitly say "confirm order"
5. Only execute after confirmation

For every close / lightning close:

• Display current position size, cost basis, current PnL
• Confirm whether it is "close all" or "partial close"
• Lightning close = market order, immediate fill, no price protection

For every leverage change:

• Display current leverage → target leverage
• Check whether positions / open orders will be impacted
• Warn about risk (higher leverage = closer liquidation price)

Error codes

• position-empty — no position, cannot close
• volume-precision-error — contracts must be integer
• lever-rate-too-high — exceeds the contract's leverage tier cap
• available-margin-insufficient — insufficient margin; transfer in more USDT or lower leverage
• Rate limit: roughly max 30 orders/cancels per second

Installation

curl -fsSL https://github.com/htx-exchange/htx-skills-hub/releases/latest/download/install.sh | bash -s -- futures-trading

Related docs

• HTX perpetual futures API: https://huobiapi.github.io/docs/usdt_swap/v1/cn/