Aster Spot API Trading (v3 — Testnet)

Base: https://sapi.asterdex-testnet.com. Signed (TRADE/USER_DATA). POST/DELETE: body application/x-www-form-urlencoded.

New order

POST /api/v3/order (W: 1)

Type-specific required: LIMIT → timeInForce, quantity, price. MARKET → quantity or quoteOrderQty (BUY). STOP/TAKE_PROFIT → quantity, price, stopPrice. STOP_MARKET/TAKE_PROFIT_MARKET → quantity, stopPrice.

Order types: LIMIT, MARKET, STOP, TAKE_PROFIT, STOP_MARKET, TAKE_PROFIT_MARKET.

Cancel / Query

• DELETE /api/v3/order (W: 1): symbol + orderId or origClientOrderId.
• GET /api/v3/order (W: 1): symbol + orderId or origClientOrderId.
• GET /api/v3/openOrders (W: 1 or 40): symbol optional; no symbol = all (40).
• DELETE /api/v3/allOpenOrders (W: 1): symbol (required); optional orderIdList or origClientOrderIdList for batch cancel.
• GET /api/v3/allOrders (W: 5): symbol req.; orderId, startTime, endTime, limit (500 default, 1000 max). Max range 7 days.

No POST batchOrders (create); batch cancel via allOpenOrders with list params.

Payload shapes: reference.md.