diff --git a/src/endpoints/cart.js b/src/endpoints/cart.js
index 7c69bbb..2a058f2 100644
--- a/src/endpoints/cart.js
+++ b/src/endpoints/cart.js
@@ -7,9 +7,14 @@ import {
 } from '../utils/helpers'
 
 class CartEndpoint extends BaseExtend {
+  /**
+   * @param {import('../factories/request').default} request - The RequestFactory instance
+   * @param {string} id - The cart ID
+   */
   constructor(request, id) {
     super(...arguments)
 
+    /** @type {import('../factories/request').default} */
     this.request = request
     this.cartId = id
     this.endpoint = 'carts'
@@ -88,6 +93,38 @@ class CartEndpoint extends BaseExtend {
     )
   }
 
+  AddProducts(products, options, token = null, additionalHeaders = {}) {
+    const items = products.map(product => {
+      const { id, sku, quantity = 1, ...rest } = product
+      const item = {
+        type: 'cart_item',
+        quantity,
+        ...rest
+      }
+      
+      if (id) {
+        item.id = id
+      } else if (sku) {
+        item.sku = sku
+      }
+      
+      return item
+    })
+
+    const body = options ? { data: items, options } : { data: items }
+
+    return this.request.send(
+      `${this.endpoint}/${this.cartId}/items`,
+      'POST',
+      body,
+      token,
+      null,
+      false,
+      null,
+      additionalHeaders
+    )
+  }
+
   AddCustomItem(body) {
     const itemObject = Object.assign(body, {
       type: 'custom_item'
@@ -176,6 +213,13 @@ class CartEndpoint extends BaseExtend {
     )
   }
 
+  RemovePromotion(promoCode) {
+    return this.request.send(
+      `${this.endpoint}/${this.cartId}/discounts/${promoCode}`,
+      'DELETE'
+    )
+  }
+
   BulkAdd(body, options) {
     return this.request.send(`${this.endpoint}/${this.cartId}/items`, 'POST', {
       data: body,
diff --git a/src/types/cart.d.ts b/src/types/cart.d.ts
index 3002d33..78a71fd 100644
--- a/src/types/cart.d.ts
+++ b/src/types/cart.d.ts
@@ -15,6 +15,7 @@ import { Address } from './address'
 import { Price, FormattedPrice } from './price'
 import { Order } from './order'
 import { PcmProductResponse } from './pcm'
+import { Promotion } from './promotions'
 
 export interface CheckoutCustomer {
   id: string
@@ -58,6 +59,7 @@ export interface Cart {
   links?: {}
   meta?: {
     display_price?: {
+      discount?: FormattedPrice
       with_tax?: FormattedPrice
       without_tax?: FormattedPrice
       tax?: FormattedPrice
@@ -165,6 +167,11 @@ export interface BulkAddOptions {
   add_all_or_nothing: boolean
 }
 
+export type AddProductsItem = {
+  quantity?: number
+  [key: string]: any
+} & ({ id: string; sku?: never } | { sku: string; id?: never })
+
 export interface BulkCustomDiscountOptions {
   add_all_or_nothing: boolean
 }
@@ -199,7 +206,7 @@ export interface CartTaxItemObject {
   }
 }
 
-export type CartInclude = 'items' | 'tax_items'
+export type CartInclude = 'items' | 'tax_items' | 'promotions'
 
 interface CartQueryableResource<R, F, S>
   extends QueryableResource<Cart, F, S, CartInclude> {
@@ -208,6 +215,7 @@ interface CartQueryableResource<R, F, S>
 
 export interface CartIncluded {
   items: CartItem[]
+  promotions: Promotion[]
 }
 
 export interface CartAdditionalHeaders {
@@ -385,6 +393,21 @@ export interface CartEndpoint
     additionalHeaders?: CartAdditionalHeaders
   ): Promise<CartItemsResponse>
 
+  /**
+   * Add Multiple Products to Cart
+   * Description: Add multiple products to cart in a single request. Each product can be identified by either ID or SKU.
+   * @param products Array of products to add, each with either an id or sku field
+   * @param options Optional bulk add options
+   * @param token Optional customer token
+   * @param additionalHeaders Optional additional headers
+   */
+  AddProducts(
+    products: AddProductsItem[],
+    options?: BulkAddOptions,
+    token?: string,
+    additionalHeaders?: CartAdditionalHeaders
+  ): Promise<CartItemsResponse>
+
   RemoveAllItems(): Promise<CartItemsResponse>
 
   /**
@@ -418,6 +441,14 @@ export interface CartEndpoint
    */
   AddPromotion(code: string): Promise<CartItemsResponse>
 
+  /**
+   * Remove promotion from Cart
+   * Description: Removes a manually applied promotion code from a cart. Does not work if the promotion is applied automatically.
+   * DOCS: https://developer.elasticpath.com/docs/api/carts/delete-a-promotion-via-promotion-code
+   * @param promoCode the promotion code to remove.
+   */
+  RemovePromotion(promoCode: string): Promise<{}>
+
   /**
    * Bulk Update Items to Cart
    * Description: When you enable the bulk update feature, a shopper can update an array of items to their cart in one action, rather than updating each item one at a time.