diff --git a/src/spot-client-v3.ts b/src/spot-client-v3.ts
index 514bb0e..bf75429 100644
--- a/src/spot-client-v3.ts
+++ b/src/spot-client-v3.ts
@@ -5,6 +5,12 @@ import {
   OrderSide,
   OrderTypeSpot,
   SpotBalances,
+  KlineInterval,
+  NewSpotOrderV3,
+  SpotMyTradesRequest,
+  SpotLeveragedTokenPRHistoryRequest,
+  SpotCrossMarginBorrowingInfoRequest,
+  SpotCrossMarginRepaymentHistoryRequest,
 } from './types';
 import { REST_CLIENT_TYPE_ENUM } from './util';
 import BaseRestClient from './util/BaseRestClient';
@@ -40,8 +46,16 @@ export class SpotV3Client extends BaseRestClient {
   }
 
   /** Get merged orderbook for symbol */
-  getOrderBookMerged(params: unknown): Promise<APIResponseV3<any>> {
-    return this.get('/spot/v3/public/quote/depth/merged', params);
+  getOrderBookMerged(
+    symbol: string,
+    scale?: number,
+    limit?: number
+  ): Promise<APIResponseV3<any>> {
+    return this.get('/spot/v3/public/quote/depth/merged', {
+      symbol,
+      scale,
+      limit,
+    });
   }
 
   /** Get public trading records (raw trades) */
@@ -50,8 +64,20 @@ export class SpotV3Client extends BaseRestClient {
   }
 
   /** Get candles/klines */
-  getCandles(params: unknown): Promise<APIResponseV3<any>> {
-    return this.get('/spot/v3/public/quote/kline', params);
+  getCandles(
+    symbol: string,
+    interval: KlineInterval,
+    limit?: number,
+    startTime?: number,
+    endTime?: number
+  ): Promise<APIResponseV3<any>> {
+    return this.get('/spot/v3/public/quote/kline', {
+      symbol,
+      interval,
+      limit,
+      startTime,
+      endTime,
+    });
   }
 
   /** Get latest information for symbol (24hr ticker) */
@@ -78,7 +104,7 @@ export class SpotV3Client extends BaseRestClient {
   /** -> Order API */
 
   /** Create order */
-  submitOrder(params: unknown): Promise<APIResponseV3<any>> {
+  submitOrder(params: NewSpotOrderV3): Promise<APIResponseV3<any>> {
     return this.postPrivate('/spot/v3/private/order', params);
   }
 
@@ -147,7 +173,7 @@ export class SpotV3Client extends BaseRestClient {
    * If startTime is not specified, you can only query for records in the last 7 days.
    * If you want to query for records older than 7 days, startTime is required.
    */
-  getMyTrades(params?: unknown): Promise<APIResponseV3<any>> {
+  getMyTrades(params?: SpotMyTradesRequest): Promise<APIResponseV3<any>> {
     return this.getPrivate('/spot/v3/private/my-trades', params);
   }
 
@@ -215,7 +241,9 @@ export class SpotV3Client extends BaseRestClient {
   }
 
   /** Get leveraged token purchase/redemption history */
-  getLeveragedTokenPRHistory(params: unknown): Promise<APIResponseV3<any>> {
+  getLeveragedTokenPRHistory(
+    params?: SpotLeveragedTokenPRHistoryRequest
+  ): Promise<APIResponseV3<any>> {
     return this.getPrivate('/spot/v3/private/record', params);
   }
 
@@ -245,7 +273,9 @@ export class SpotV3Client extends BaseRestClient {
   }
 
   /** Query borrowing info */
-  getCrossMarginBorrowingInfo(params?: unknown): Promise<APIResponseV3<any>> {
+  getCrossMarginBorrowingInfo(
+    params?: SpotCrossMarginBorrowingInfoRequest
+  ): Promise<APIResponseV3<any>> {
     return this.getPrivate('/spot/v3/private/cross-margin-orders', params);
   }
 
@@ -261,7 +291,7 @@ export class SpotV3Client extends BaseRestClient {
 
   /** Query repayment history */
   getCrossMarginRepaymentHistory(
-    params?: unknown
+    params?: SpotCrossMarginRepaymentHistoryRequest
   ): Promise<APIResponseV3<any>> {
     return this.getPrivate(
       '/spot/v3/private/cross-margin-repay-history',
diff --git a/src/types/index.ts b/src/types/index.ts
index 78f54db..145ac98 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -1,4 +1,3 @@
 export * from './response';
 export * from './request';
 export * from './shared';
-export * from './spot';
diff --git a/src/types/request/index.ts b/src/types/request/index.ts
index e80dc2f..77aaef5 100644
--- a/src/types/request/index.ts
+++ b/src/types/request/index.ts
@@ -1,5 +1,6 @@
 export * from './account-asset';
 export * from './copy-trading';
+export * from './spot';
 export * from './usdt-perp';
 export * from './usdc-perp';
 export * from './usdc-options';
diff --git a/src/types/request/spot.ts b/src/types/request/spot.ts
new file mode 100644
index 0000000..fc589ea
--- /dev/null
+++ b/src/types/request/spot.ts
@@ -0,0 +1,81 @@
+import { numberInString, OrderSide } from '../shared';
+
+export type OrderTypeSpot = 'LIMIT' | 'MARKET' | 'LIMIT_MAKER';
+export type OrderTimeInForce = 'GTC' | 'FOK' | 'IOC';
+
+export interface NewSpotOrder {
+  symbol: string;
+  qty: number;
+  side: OrderSide;
+  type: OrderTypeSpot;
+  timeInForce?: OrderTimeInForce;
+  price?: number;
+  orderLinkId?: string;
+}
+
+export interface NewSpotOrderV3 {
+  symbol: string;
+  orderQty: string;
+  side: OrderSide;
+  orderType: OrderTypeSpot;
+  timeInForce?: OrderTimeInForce;
+  orderPrice?: string;
+  orderLinkId?: string;
+  orderCategory?: 0 | 1;
+  triggerPrice?: string;
+}
+
+export interface SpotOrderQueryById {
+  orderId?: string;
+  orderLinkId?: string;
+}
+
+export interface SpotSymbolInfo {
+  name: string;
+  alias: string;
+  baseCurrency: string;
+  quoteCurrency: string;
+  basePrecision: numberInString;
+  quotePrecision: numberInString;
+  minTradeQuantity: numberInString;
+  minTradeAmount: numberInString;
+  minPricePrecision: numberInString;
+  maxTradeQuantity: numberInString;
+  maxTradeAmount: numberInString;
+  category: numberInString;
+}
+
+export interface SpotMyTradesRequest {
+  symbol?: string;
+  orderId?: string;
+  limit?: string;
+  startTime?: number;
+  endTime?: number;
+  fromTradeId?: string;
+  toTradeId?: string;
+}
+
+export interface SpotLeveragedTokenPRHistoryRequest {
+  ltCode?: string;
+  orderId?: string;
+  startTime?: number;
+  endTime?: number;
+  limit?: number;
+  orderType?: 1 | 2;
+  serialNo?: string;
+}
+
+export interface SpotCrossMarginBorrowingInfoRequest {
+  startTime?: number;
+  endTime?: number;
+  coin?: string;
+  status?: 0 | 1 | 2;
+  limit?: number;
+}
+
+export interface SpotCrossMarginRepaymentHistoryRequest {
+  startTime?: number;
+  endTime?: number;
+  coin?: string;
+  limit?: number;
+}
diff --git a/src/types/spot.ts b/src/types/spot.ts
deleted file mode 100644
index 24a581d..0000000
--- a/src/types/spot.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { numberInString, OrderSide } from './shared';
-
-export type OrderTypeSpot = 'LIMIT' | 'MARKET' | 'LIMIT_MAKER';
-export type OrderTimeInForce = 'GTC' | 'FOK' | 'IOC';
-
-export interface NewSpotOrder {
-  symbol: string;
-  qty: number;
-  side: OrderSide;
-  type: OrderTypeSpot;
-  timeInForce?: OrderTimeInForce;
-  price?: number;
-  orderLinkId?: string;
-}
-
-export interface SpotOrderQueryById {
-  orderId?: string;
-  orderLinkId?: string;
-}
-
-export interface SpotSymbolInfo {
-  name: string;
-  alias: string;
-  baseCurrency: string;
-  quoteCurrency: string;
-  basePrecision: numberInString;
-  quotePrecision: numberInString;
-  minTradeQuantity: numberInString;
-  minTradeAmount: numberInString;
-  minPricePrecision: numberInString;
-  maxTradeQuantity: numberInString;
-  maxTradeAmount: numberInString;
-  category: numberInString;
-}