diff --git a/framework/bigcommerce/api/endpoints/cart/handlers/add-item.ts b/framework/bigcommerce/api/endpoints/cart/handlers/add-item.ts
new file mode 100644
index 000000000..c47e72cdb
--- /dev/null
+++ b/framework/bigcommerce/api/endpoints/cart/handlers/add-item.ts
@@ -0,0 +1,45 @@
+import { parseCartItem } from '../../utils/parse-item'
+import getCartCookie from '../../utils/get-cart-cookie'
+import type { CartHandlers } from '..'
+
+const addItem: CartHandlers['addItem'] = async ({
+  res,
+  body: { cartId, item },
+  config,
+}) => {
+  if (!item) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Missing item' }],
+    })
+  }
+  if (!item.quantity) item.quantity = 1
+
+  const options = {
+    method: 'POST',
+    body: JSON.stringify({
+      line_items: [parseCartItem(item)],
+      ...(!cartId && config.storeChannelId
+        ? { channel_id: config.storeChannelId }
+        : {}),
+    }),
+  }
+  const { data } = cartId
+    ? await config.storeApiFetch(
+        `/v3/carts/${cartId}/items?include=line_items.physical_items.options`,
+        options
+      )
+    : await config.storeApiFetch(
+        '/v3/carts?include=line_items.physical_items.options',
+        options
+      )
+
+  // Create or update the cart cookie
+  res.setHeader(
+    'Set-Cookie',
+    getCartCookie(config.cartCookie, data.id, config.cartCookieMaxAge)
+  )
+  res.status(200).json({ data })
+}
+
+export default addItem
diff --git a/framework/bigcommerce/api/endpoints/cart/handlers/get-cart.ts b/framework/bigcommerce/api/endpoints/cart/handlers/get-cart.ts
new file mode 100644
index 000000000..890ac9997
--- /dev/null
+++ b/framework/bigcommerce/api/endpoints/cart/handlers/get-cart.ts
@@ -0,0 +1,32 @@
+import type { BigcommerceCart } from '../../../types'
+import { BigcommerceApiError } from '../../utils/errors'
+import getCartCookie from '../../utils/get-cart-cookie'
+import type { CartHandlers } from '../'
+
+// Return current cart info
+const getCart: CartHandlers['getCart'] = async ({
+  res,
+  body: { cartId },
+  config,
+}) => {
+  let result: { data?: BigcommerceCart } = {}
+
+  if (cartId) {
+    try {
+      result = await config.storeApiFetch(
+        `/v3/carts/${cartId}?include=line_items.physical_items.options`
+      )
+    } catch (error) {
+      if (error instanceof BigcommerceApiError && error.status === 404) {
+        // Remove the cookie if it exists but the cart wasn't found
+        res.setHeader('Set-Cookie', getCartCookie(config.cartCookie))
+      } else {
+        throw error
+      }
+    }
+  }
+
+  res.status(200).json({ data: result.data ?? null })
+}
+
+export default getCart
diff --git a/framework/bigcommerce/api/endpoints/cart/handlers/remove-item.ts b/framework/bigcommerce/api/endpoints/cart/handlers/remove-item.ts
new file mode 100644
index 000000000..c09848948
--- /dev/null
+++ b/framework/bigcommerce/api/endpoints/cart/handlers/remove-item.ts
@@ -0,0 +1,33 @@
+import getCartCookie from '../../utils/get-cart-cookie'
+import type { CartHandlers } from '..'
+
+const removeItem: CartHandlers['removeItem'] = async ({
+  res,
+  body: { cartId, itemId },
+  config,
+}) => {
+  if (!cartId || !itemId) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Invalid request' }],
+    })
+  }
+
+  const result = await config.storeApiFetch<{ data: any } | null>(
+    `/v3/carts/${cartId}/items/${itemId}?include=line_items.physical_items.options`,
+    { method: 'DELETE' }
+  )
+  const data = result?.data ?? null
+
+  res.setHeader(
+    'Set-Cookie',
+    data
+      ? // Update the cart cookie
+        getCartCookie(config.cartCookie, cartId, config.cartCookieMaxAge)
+      : // Remove the cart cookie if the cart was removed (empty items)
+        getCartCookie(config.cartCookie)
+  )
+  res.status(200).json({ data })
+}
+
+export default removeItem
diff --git a/framework/bigcommerce/api/endpoints/cart/handlers/update-item.ts b/framework/bigcommerce/api/endpoints/cart/handlers/update-item.ts
new file mode 100644
index 000000000..27b74ca20
--- /dev/null
+++ b/framework/bigcommerce/api/endpoints/cart/handlers/update-item.ts
@@ -0,0 +1,35 @@
+import { parseCartItem } from '../../utils/parse-item'
+import getCartCookie from '../../utils/get-cart-cookie'
+import type { CartHandlers } from '..'
+
+const updateItem: CartHandlers['updateItem'] = async ({
+  res,
+  body: { cartId, itemId, item },
+  config,
+}) => {
+  if (!cartId || !itemId || !item) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Invalid request' }],
+    })
+  }
+
+  const { data } = await config.storeApiFetch(
+    `/v3/carts/${cartId}/items/${itemId}?include=line_items.physical_items.options`,
+    {
+      method: 'PUT',
+      body: JSON.stringify({
+        line_item: parseCartItem(item),
+      }),
+    }
+  )
+
+  // Update the cart cookie
+  res.setHeader(
+    'Set-Cookie',
+    getCartCookie(config.cartCookie, cartId, config.cartCookieMaxAge)
+  )
+  res.status(200).json({ data })
+}
+
+export default updateItem
diff --git a/framework/bigcommerce/api/endpoints/cart/index.ts b/framework/bigcommerce/api/endpoints/cart/index.ts
new file mode 100644
index 000000000..4ee668895
--- /dev/null
+++ b/framework/bigcommerce/api/endpoints/cart/index.ts
@@ -0,0 +1,78 @@
+import isAllowedMethod from '../utils/is-allowed-method'
+import createApiHandler, {
+  BigcommerceApiHandler,
+  BigcommerceHandler,
+} from '../utils/create-api-handler'
+import { BigcommerceApiError } from '../utils/errors'
+import getCart from './handlers/get-cart'
+import addItem from './handlers/add-item'
+import updateItem from './handlers/update-item'
+import removeItem from './handlers/remove-item'
+import type {
+  BigcommerceCart,
+  GetCartHandlerBody,
+  AddCartItemHandlerBody,
+  UpdateCartItemHandlerBody,
+  RemoveCartItemHandlerBody,
+} from '../../types'
+
+export type CartHandlers = {
+  getCart: BigcommerceHandler<BigcommerceCart, GetCartHandlerBody>
+  addItem: BigcommerceHandler<BigcommerceCart, AddCartItemHandlerBody>
+  updateItem: BigcommerceHandler<BigcommerceCart, UpdateCartItemHandlerBody>
+  removeItem: BigcommerceHandler<BigcommerceCart, RemoveCartItemHandlerBody>
+}
+
+const METHODS = ['GET', 'POST', 'PUT', 'DELETE']
+
+// TODO: a complete implementation should have schema validation for `req.body`
+const cartApi: BigcommerceApiHandler<BigcommerceCart, CartHandlers> = async (
+  req,
+  res,
+  config,
+  handlers
+) => {
+  if (!isAllowedMethod(req, res, METHODS)) return
+
+  const { cookies } = req
+  const cartId = cookies[config.cartCookie]
+
+  try {
+    // Return current cart info
+    if (req.method === 'GET') {
+      const body = { cartId }
+      return await handlers['getCart']({ req, res, config, body })
+    }
+
+    // Create or add an item to the cart
+    if (req.method === 'POST') {
+      const body = { ...req.body, cartId }
+      return await handlers['addItem']({ req, res, config, body })
+    }
+
+    // Update item in cart
+    if (req.method === 'PUT') {
+      const body = { ...req.body, cartId }
+      return await handlers['updateItem']({ req, res, config, body })
+    }
+
+    // Remove an item from the cart
+    if (req.method === 'DELETE') {
+      const body = { ...req.body, cartId }
+      return await handlers['removeItem']({ req, res, config, body })
+    }
+  } catch (error) {
+    console.error(error)
+
+    const message =
+      error instanceof BigcommerceApiError
+        ? 'An unexpected error ocurred with the Bigcommerce API'
+        : 'An unexpected error ocurred'
+
+    res.status(500).json({ data: null, errors: [{ message }] })
+  }
+}
+
+export const handlers = { getCart, addItem, updateItem, removeItem }
+
+export default createApiHandler(cartApi, handlers, {})
diff --git a/framework/bigcommerce/api/index.ts b/framework/bigcommerce/api/index.ts
index 0216fe61b..96ac92477 100644
--- a/framework/bigcommerce/api/index.ts
+++ b/framework/bigcommerce/api/index.ts
@@ -1,5 +1,5 @@
 import type { RequestInit } from '@vercel/fetch'
-import type { CommerceAPIConfig } from '@commerce/api'
+import { CommerceAPIConfig, createAPIProvider } from '@commerce/api'
 import fetchGraphqlApi from './utils/fetch-graphql-api'
 import fetchStoreApi from './utils/fetch-store-api'
 
@@ -79,6 +79,24 @@ const config = new Config({
   storeApiFetch: fetchStoreApi,
 })
 
+const config2: BigcommerceConfig = {
+  commerceUrl: API_URL,
+  apiToken: API_TOKEN,
+  customerCookie: 'SHOP_TOKEN',
+  cartCookie: process.env.BIGCOMMERCE_CART_COOKIE ?? 'bc_cartId',
+  cartCookieMaxAge: ONE_DAY * 30,
+  fetch: fetchGraphqlApi,
+  applyLocale: true,
+  // REST API only
+  storeApiUrl: STORE_API_URL,
+  storeApiToken: STORE_API_TOKEN,
+  storeApiClientId: STORE_API_CLIENT_ID,
+  storeChannelId: STORE_CHANNEL_ID,
+  storeApiFetch: fetchStoreApi,
+}
+
+export const commerce = createAPIProvider({ config: config2 })
+
 export function getConfig(userConfig?: Partial<BigcommerceConfig>) {
   return config.getConfig(userConfig)
 }
diff --git a/framework/bigcommerce/api/provider.ts b/framework/bigcommerce/api/provider.ts
new file mode 100644
index 000000000..e69de29bb
diff --git a/framework/bigcommerce/api/utils/create-api-handler.ts b/framework/bigcommerce/api/utils/create-api-handler.ts
index 315ec464b..c1d651d9b 100644
--- a/framework/bigcommerce/api/utils/create-api-handler.ts
+++ b/framework/bigcommerce/api/utils/create-api-handler.ts
@@ -48,7 +48,7 @@ export default function createApiHandler<
     operations?: Partial<H>
     options?: Options extends {} ? Partial<Options> : never
   } = {}): NextApiHandler {
-    const ops = { ...operations, ...handlers }
+    const ops = { ...handlers, ...operations }
     const opts = { ...defaultOptions, ...options }
 
     return function apiHandler(req, res) {
diff --git a/framework/commerce/api/endpoints/cart.ts b/framework/commerce/api/endpoints/cart.ts
new file mode 100644
index 000000000..e7570c34c
--- /dev/null
+++ b/framework/commerce/api/endpoints/cart.ts
@@ -0,0 +1,58 @@
+import type { APIEndpoint, APIHandler } from '../utils/types'
+import isAllowedMethod from '../utils/is-allowed-method'
+
+import cn from 'classnames'
+import isAllowedOperation from '../utils/is-allowed-operation'
+import type { APIProvider, CartHandlers } from '..'
+
+cn({ yo: true })
+
+const METHODS = ['GET', 'POST', 'PUT', 'DELETE']
+
+const cartApi: APIEndpoint<APIProvider, CartHandlers> = async (ctx) => {
+  if (
+    !isAllowedOperation(ctx.req, ctx.res, {
+      GET: ctx.handlers['getCart'],
+    })
+  ) {
+    return
+  }
+
+  const { cookies } = req
+  const cartId = cookies[config.cartCookie]
+
+  try {
+    // Return current cart info
+    if (req.method === 'GET') {
+      const body = { cartId }
+      return await handlers['getCart']({ req, res, config, body })
+    }
+
+    // Create or add an item to the cart
+    if (req.method === 'POST') {
+      const body = { ...req.body, cartId }
+      return await handlers['addItem']({ req, res, config, body })
+    }
+
+    // Update item in cart
+    if (req.method === 'PUT') {
+      const body = { ...req.body, cartId }
+      return await handlers['updateItem']({ req, res, config, body })
+    }
+
+    // Remove an item from the cart
+    if (req.method === 'DELETE') {
+      const body = { ...req.body, cartId }
+      return await handlers['removeItem']({ req, res, config, body })
+    }
+  } catch (error) {
+    console.error(error)
+
+    const message =
+      error instanceof BigcommerceApiError
+        ? 'An unexpected error ocurred with the Bigcommerce API'
+        : 'An unexpected error ocurred'
+
+    res.status(500).json({ data: null, errors: [{ message }] })
+  }
+}
diff --git a/framework/commerce/api/index.ts b/framework/commerce/api/index.ts
index 77b2eeb7e..61c9c89d2 100644
--- a/framework/commerce/api/index.ts
+++ b/framework/commerce/api/index.ts
@@ -1,4 +1,44 @@
 import type { RequestInit, Response } from '@vercel/fetch'
+import type { APIEndpoint, APIHandler } from './utils/types'
+
+export type CartHandlers = {
+  getCart: APIHandler<any>
+  addItem: APIHandler<any>
+  updateItem: APIHandler<any>
+  removeItem: APIHandler<any>
+}
+
+export type CoreAPIProvider = {
+  config: CommerceAPIConfig
+  endpoints?: {
+    cart?: {
+      handler: APIEndpoint<any, any, CartHandlers, any>
+      handlers: CartHandlers
+    }
+  }
+}
+
+export type APIProvider<P extends CoreAPIProvider = CoreAPIProvider> = P & {
+  getConfig(userConfig?: Partial<P['config']>): P['config']
+  setConfig(newConfig: Partial<P['config']>): void
+}
+
+export function createAPIProvider<P extends CoreAPIProvider>(
+  provider: P
+): APIProvider<P> {
+  return {
+    ...provider,
+    getConfig(userConfig = {}) {
+      return Object.entries(userConfig).reduce(
+        (cfg, [key, value]) => Object.assign(cfg, { [key]: value }),
+        { ...this.config }
+      )
+    },
+    setConfig(newConfig) {
+      Object.assign(this.config, newConfig)
+    },
+  }
+}
 
 export interface CommerceAPIConfig {
   locale?: string
diff --git a/framework/commerce/api/utils/is-allowed-method.ts b/framework/commerce/api/utils/is-allowed-method.ts
new file mode 100644
index 000000000..51c37e221
--- /dev/null
+++ b/framework/commerce/api/utils/is-allowed-method.ts
@@ -0,0 +1,30 @@
+import type { NextApiRequest, NextApiResponse } from 'next'
+
+export type HTTP_METHODS = 'OPTIONS' | 'GET' | 'POST' | 'PUT' | 'DELETE'
+
+export default function isAllowedMethod(
+  req: NextApiRequest,
+  res: NextApiResponse,
+  allowedMethods: HTTP_METHODS[]
+) {
+  const methods = allowedMethods.includes('OPTIONS')
+    ? allowedMethods
+    : [...allowedMethods, 'OPTIONS']
+
+  if (!req.method || !methods.includes(req.method)) {
+    res.status(405)
+    res.setHeader('Allow', methods.join(', '))
+    res.end()
+    return false
+  }
+
+  if (req.method === 'OPTIONS') {
+    res.status(200)
+    res.setHeader('Allow', methods.join(', '))
+    res.setHeader('Content-Length', '0')
+    res.end()
+    return false
+  }
+
+  return true
+}
diff --git a/framework/commerce/api/utils/is-allowed-operation.ts b/framework/commerce/api/utils/is-allowed-operation.ts
new file mode 100644
index 000000000..dd650c8f1
--- /dev/null
+++ b/framework/commerce/api/utils/is-allowed-operation.ts
@@ -0,0 +1,19 @@
+import type { NextApiRequest, NextApiResponse } from 'next'
+import isAllowedMethod, { HTTP_METHODS } from './is-allowed-method'
+import { APIHandler } from './types'
+
+export default function isAllowedOperation(
+  req: NextApiRequest,
+  res: NextApiResponse,
+  allowedHandlers: { [k in HTTP_METHODS]?: APIHandler<any> }
+) {
+  const methods = Object.keys(allowedHandlers) as HTTP_METHODS[]
+  const allowedMethods = methods.reduce<HTTP_METHODS[]>((arr, method) => {
+    if (allowedHandlers[method]) {
+      arr.push(method)
+    }
+    return arr
+  }, [])
+
+  return isAllowedMethod(req, res, allowedMethods)
+}
diff --git a/framework/commerce/api/utils/types.ts b/framework/commerce/api/utils/types.ts
new file mode 100644
index 000000000..fcf2057dd
--- /dev/null
+++ b/framework/commerce/api/utils/types.ts
@@ -0,0 +1,45 @@
+import type { NextApiHandler, NextApiRequest, NextApiResponse } from 'next'
+import type { APIProvider } from '..'
+
+export type APIResponse<Data = any> = {
+  data: Data
+  errors?: { message: string; code?: string }[]
+}
+
+export type APIHandlerContext<
+  P extends APIProvider,
+  H extends APIHandlers<P, Data> = {},
+  Data = any,
+  Options extends {} = {}
+> = {
+  req: NextApiRequest
+  res: NextApiResponse<APIResponse<Data>>
+  provider: P
+  config: P['config']
+  handlers: H
+  /**
+   * Custom configs that may be used by a particular handler
+   */
+  options: Options
+}
+
+export type APIHandler<
+  P extends APIProvider,
+  H extends APIHandlers<P, Data> = {},
+  Data = any,
+  Body = any,
+  Options extends {} = {}
+> = (
+  context: APIHandlerContext<P, H, Data, Options> & { body: Body }
+) => void | Promise<void>
+
+export type APIHandlers<P extends APIProvider, Data = any> = {
+  [k: string]: APIHandler<P, any, Data, any>
+}
+
+export type APIEndpoint<
+  P extends APIProvider = APIProvider,
+  H extends APIHandlers<P, Data> = {},
+  Data = any,
+  Options extends {} = {}
+> = (context: APIHandlerContext<P, H, Data, Options>) => void | Promise<void>
diff --git a/framework/commerce/types.ts b/framework/commerce/types.ts
index a398070ac..c48c66f2b 100644
--- a/framework/commerce/types.ts
+++ b/framework/commerce/types.ts
@@ -160,6 +160,19 @@ interface Entity {
   [prop: string]: any
 }
 
+export interface Product2 {
+  id: string
+  name: string
+  description: string
+  sku?: string
+  slug?: string
+  path?: string
+  images: ProductImage[]
+  variants: ProductVariant2[]
+  price: ProductPrice
+  options: ProductOption[]
+}
+
 export interface Product extends Entity {
   name: string
   description: string