diff --git a/codegen.json b/codegen.json
index cce0f4f8b..e08292091 100644
--- a/codegen.json
+++ b/codegen.json
@@ -8,7 +8,7 @@
   },
   "documents": [
     {
-      "./lib/bigcommerce/api/{operations,fragments}/**/*.ts": {
+      "./lib/bigcommerce/api/**/*.ts": {
         "noRequire": true
       }
     }
diff --git a/lib/bigcommerce/api/cart/index.ts b/lib/bigcommerce/api/cart/index.ts
index f2f174b84..4f6062674 100644
--- a/lib/bigcommerce/api/cart/index.ts
+++ b/lib/bigcommerce/api/cart/index.ts
@@ -80,19 +80,19 @@ const cartApi: BigcommerceApiHandler<Cart, CartHandlers> = async (
 
     // Create or add an item to the cart
     if (req.method === 'POST') {
-      const body = { cartId, ...req.body }
+      const body = { ...req.body, cartId }
       return await handlers['addItem']({ req, res, config, body })
     }
 
     // Update item in cart
     if (req.method === 'PUT') {
-      const body = { cartId, ...req.body }
+      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 = { cartId, ...req.body }
+      const body = { ...req.body, cartId }
       return await handlers['removeItem']({ req, res, config, body })
     }
   } catch (error) {
diff --git a/lib/bigcommerce/api/customers/handlers/get-logged-in-customer.ts b/lib/bigcommerce/api/customers/handlers/get-logged-in-customer.ts
new file mode 100644
index 000000000..99e9191f5
--- /dev/null
+++ b/lib/bigcommerce/api/customers/handlers/get-logged-in-customer.ts
@@ -0,0 +1,44 @@
+import { GetLoggedInCustomerQuery } from '@lib/bigcommerce/schema'
+import type { CustomersHandlers } from '..'
+
+export const getLoggedInCustomerQuery = /* GraphQL */ `
+  query getLoggedInCustomer {
+    customer {
+      entityId
+      firstName
+      lastName
+      email
+      company
+      customerGroupId
+      notes
+      phone
+      addressCount
+      attributeCount
+      storeCredit {
+        value
+        currencyCode
+      }
+    }
+  }
+`
+
+const getLoggedInCustomer: CustomersHandlers['getLoggedInCustomer'] = async ({
+  res,
+  config,
+}) => {
+  const data = await config.fetch<GetLoggedInCustomerQuery>(
+    getLoggedInCustomerQuery
+  )
+  const { customer } = data
+
+  if (!customer) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Customer not found', code: 'not_found' }],
+    })
+  }
+
+  res.status(200).json({ data: { customer } })
+}
+
+export default getLoggedInCustomer
diff --git a/lib/bigcommerce/api/customers/handlers/login.ts b/lib/bigcommerce/api/customers/handlers/login.ts
new file mode 100644
index 000000000..787c055f8
--- /dev/null
+++ b/lib/bigcommerce/api/customers/handlers/login.ts
@@ -0,0 +1,26 @@
+import login from '../../operations/login'
+import type { LoginHandlers } from '../login'
+
+const loginHandler: LoginHandlers['login'] = async ({
+  res,
+  body: { email, password },
+  config,
+}) => {
+  // TODO: Add proper validations with something like Ajv
+  if (!(email && password)) {
+    return res.status(400).json({
+      data: null,
+      errors: [{ message: 'Invalid request' }],
+    })
+  }
+  // TODO: validate the password and email
+  // Passwords must be at least 7 characters and contain both alphabetic
+  // and numeric characters.
+
+  // TODO: Currently not working, fix this asap.
+  const loginData = await login({ variables: { email, password }, config })
+
+  res.status(200).json({ data: null })
+}
+
+export default loginHandler
diff --git a/lib/bigcommerce/api/customers/handlers/create-customer.ts b/lib/bigcommerce/api/customers/handlers/signup.ts
similarity index 90%
rename from lib/bigcommerce/api/customers/handlers/create-customer.ts
rename to lib/bigcommerce/api/customers/handlers/signup.ts
index a666467ab..85400e39b 100644
--- a/lib/bigcommerce/api/customers/handlers/create-customer.ts
+++ b/lib/bigcommerce/api/customers/handlers/signup.ts
@@ -1,8 +1,8 @@
 import { BigcommerceApiError } from '../../utils/errors'
 import login from '../../operations/login'
-import type { CustomersHandlers } from '..'
+import { SignupHandlers } from '../signup'
 
-const createCustomer: CustomersHandlers['createCustomer'] = async ({
+const signup: SignupHandlers['signup'] = async ({
   res,
   body: { firstName, lastName, email, password },
   config,
@@ -57,6 +57,7 @@ const createCustomer: CustomersHandlers['createCustomer'] = async ({
 
   console.log('DATA', result.data)
 
+  // TODO: Currently not working, fix this asap.
   const loginData = await login({ variables: { email, password }, config })
 
   console.log('LOGIN DATA', loginData)
@@ -64,4 +65,4 @@ const createCustomer: CustomersHandlers['createCustomer'] = async ({
   res.status(200).json({ data: result.data ?? null })
 }
 
-export default createCustomer
+export default signup
diff --git a/lib/bigcommerce/api/customers/index.ts b/lib/bigcommerce/api/customers/index.ts
index c39f55f6a..228e882e7 100644
--- a/lib/bigcommerce/api/customers/index.ts
+++ b/lib/bigcommerce/api/customers/index.ts
@@ -4,42 +4,30 @@ import createApiHandler, {
 } from '../utils/create-api-handler'
 import isAllowedMethod from '../utils/is-allowed-method'
 import { BigcommerceApiError } from '../utils/errors'
-import createCustomer from './handlers/create-customer'
+import getLoggedInCustomer from './handlers/get-logged-in-customer'
 
-type Body<T> = Partial<T> | undefined
+export type Customer = any
 
-export type Customer = null
-
-export type CreateCustomerBody = {
-  firstName: string
-  lastName: string
-  email: string
-  password: string
+export type CustomerData = {
+  customer: Customer
 }
 
 export type CustomersHandlers = {
-  createCustomer: BigcommerceHandler<
-    Customer,
-    { cartId?: string } & Body<CreateCustomerBody>
-  >
+  getLoggedInCustomer: BigcommerceHandler<CustomerData, null>
 }
 
-const METHODS = ['POST']
+const METHODS = ['GET']
 
-const customersApi: BigcommerceApiHandler<Customer, CustomersHandlers> = async (
-  req,
-  res,
-  config
-) => {
+const customersApi: BigcommerceApiHandler<
+  CustomerData,
+  CustomersHandlers
+> = async (req, res, config, handlers) => {
   if (!isAllowedMethod(req, res, METHODS)) return
 
-  const { cookies } = req
-  const cartId = cookies[config.cartCookie]
-
   try {
-    if (req.method === 'POST') {
-      const body = { cartId, ...req.body }
-      return await handlers['createCustomer']({ req, res, config, body })
+    if (req.method === 'GET') {
+      const body = null
+      return await handlers['getLoggedInCustomer']({ req, res, config, body })
     }
   } catch (error) {
     console.error(error)
@@ -53,6 +41,6 @@ const customersApi: BigcommerceApiHandler<Customer, CustomersHandlers> = async (
   }
 }
 
-const handlers = { createCustomer }
+const handlers = { getLoggedInCustomer }
 
 export default createApiHandler(customersApi, handlers, {})
diff --git a/lib/bigcommerce/api/customers/login.ts b/lib/bigcommerce/api/customers/login.ts
new file mode 100644
index 000000000..e8f24a92d
--- /dev/null
+++ b/lib/bigcommerce/api/customers/login.ts
@@ -0,0 +1,45 @@
+import createApiHandler, {
+  BigcommerceApiHandler,
+  BigcommerceHandler,
+} from '../utils/create-api-handler'
+import isAllowedMethod from '../utils/is-allowed-method'
+import { BigcommerceApiError } from '../utils/errors'
+import login from './handlers/login'
+
+export type LoginBody = {
+  email: string
+  password: string
+}
+
+export type LoginHandlers = {
+  login: BigcommerceHandler<null, Partial<LoginBody>>
+}
+
+const METHODS = ['POST']
+
+const loginApi: BigcommerceApiHandler<null, LoginHandlers> = async (
+  req,
+  res,
+  config,
+  handlers
+) => {
+  if (!isAllowedMethod(req, res, METHODS)) return
+
+  try {
+    const body = req.body ?? {}
+    return await handlers['login']({ 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 }] })
+  }
+}
+
+const handlers = { login }
+
+export default createApiHandler(loginApi, handlers, {})
diff --git a/lib/bigcommerce/api/customers/signup.ts b/lib/bigcommerce/api/customers/signup.ts
new file mode 100644
index 000000000..aa26f78cf
--- /dev/null
+++ b/lib/bigcommerce/api/customers/signup.ts
@@ -0,0 +1,50 @@
+import createApiHandler, {
+  BigcommerceApiHandler,
+  BigcommerceHandler,
+} from '../utils/create-api-handler'
+import isAllowedMethod from '../utils/is-allowed-method'
+import { BigcommerceApiError } from '../utils/errors'
+import signup from './handlers/signup'
+
+export type SignupBody = {
+  firstName: string
+  lastName: string
+  email: string
+  password: string
+}
+
+export type SignupHandlers = {
+  signup: BigcommerceHandler<null, { cartId?: string } & Partial<SignupBody>>
+}
+
+const METHODS = ['POST']
+
+const signupApi: BigcommerceApiHandler<null, SignupHandlers> = async (
+  req,
+  res,
+  config,
+  handlers
+) => {
+  if (!isAllowedMethod(req, res, METHODS)) return
+
+  const { cookies } = req
+  const cartId = cookies[config.cartCookie]
+
+  try {
+    const body = { ...req.body, cartId }
+    return await handlers['signup']({ 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 }] })
+  }
+}
+
+const handlers = { signup }
+
+export default createApiHandler(signupApi, handlers, {})
diff --git a/lib/bigcommerce/api/utils/create-api-handler.ts b/lib/bigcommerce/api/utils/create-api-handler.ts
index c6363cb15..be623d4cd 100644
--- a/lib/bigcommerce/api/utils/create-api-handler.ts
+++ b/lib/bigcommerce/api/utils/create-api-handler.ts
@@ -3,7 +3,7 @@ import { BigcommerceConfig, getConfig } from '..'
 
 export type BigcommerceApiHandler<
   T = any,
-  H extends BigcommerceHandlers = {},
+  H extends BigcommerceHandlers<T> = {},
   Options extends {} = {}
 > = (
   req: NextApiRequest,
diff --git a/lib/bigcommerce/api/wishlist/index.ts b/lib/bigcommerce/api/wishlist/index.ts
index 912d59491..7ab8c9173 100644
--- a/lib/bigcommerce/api/wishlist/index.ts
+++ b/lib/bigcommerce/api/wishlist/index.ts
@@ -47,7 +47,7 @@ export type Wishlist = {
 export type WishlistList = Wishlist[]
 
 export type WishlistHandlers = {
-	getAllWishlists: BigcommerceHandler<WishlistList, { customerId?: string }>
+  getAllWishlists: BigcommerceHandler<WishlistList, { customerId?: string }>
   getWishlist: BigcommerceHandler<Wishlist, { wishlistId?: string }>
   addWishlist: BigcommerceHandler<
     Wishlist,
@@ -57,7 +57,10 @@ export type WishlistHandlers = {
     Wishlist,
     { wishlistId: string } & Body<AddWishlistBody>
   >
-  addItem: BigcommerceHandler<Wishlist, { wishlistId: string } & Body<AddItemBody>>
+  addItem: BigcommerceHandler<
+    Wishlist,
+    { wishlistId: string } & Body<AddItemBody>
+  >
   removeItem: BigcommerceHandler<
     Wishlist,
     { wishlistId: string } & Body<RemoveItemBody>
@@ -86,13 +89,13 @@ const wishlistApi: BigcommerceApiHandler<Wishlist, WishlistHandlers> = async (
 
     // Add an item to the wishlist
     if (req.method === 'POST' && wishlistId) {
-      const body = { wishlistId, ...req.body }
+      const body = { ...req.body, wishlistId }
       return await handlers['addItem']({ req, res, config, body })
     }
 
     // Update a wishlist
     if (req.method === 'PUT' && wishlistId) {
-      const body = { wishlistId, ...req.body }
+      const body = { ...req.body, wishlistId }
       return await handlers['updateWishlist']({ req, res, config, body })
     }
 
diff --git a/lib/bigcommerce/cart/use-add-item.tsx b/lib/bigcommerce/cart/use-add-item.tsx
index a18a7b651..fa8bb8b46 100644
--- a/lib/bigcommerce/cart/use-add-item.tsx
+++ b/lib/bigcommerce/cart/use-add-item.tsx
@@ -26,8 +26,8 @@ export const fetcher: HookFetcher<Cart, AddItemBody> = (
   }
 
   return fetch({
-    url: options?.url ?? defaultOpts.url,
-    method: options?.method ?? defaultOpts.method,
+    ...defaultOpts,
+    ...options,
     body: { item },
   })
 }
diff --git a/lib/bigcommerce/cart/use-cart.tsx b/lib/bigcommerce/cart/use-cart.tsx
index 8fe80747a..7ed6ba7d8 100644
--- a/lib/bigcommerce/cart/use-cart.tsx
+++ b/lib/bigcommerce/cart/use-cart.tsx
@@ -5,6 +5,7 @@ import type { Cart } from '../api/cart'
 
 const defaultOpts = {
   url: '/api/bigcommerce/cart',
+  method: 'GET',
 }
 
 export type { Cart }
@@ -14,12 +15,7 @@ export const fetcher: HookFetcher<Cart | null, CartInput> = (
   { cartId },
   fetch
 ) => {
-  return cartId
-    ? fetch({
-        url: options?.url,
-        query: options?.query,
-      })
-    : null
+  return cartId ? fetch({ ...defaultOpts, ...options }) : null
 }
 
 export function extendHook(
diff --git a/lib/bigcommerce/cart/use-remove-item.tsx b/lib/bigcommerce/cart/use-remove-item.tsx
index 386462c7f..c07aa718e 100644
--- a/lib/bigcommerce/cart/use-remove-item.tsx
+++ b/lib/bigcommerce/cart/use-remove-item.tsx
@@ -19,8 +19,8 @@ export const fetcher: HookFetcher<Cart | null, RemoveItemBody> = (
   fetch
 ) => {
   return fetch({
-    url: options?.url ?? defaultOpts.url,
-    method: options?.method ?? defaultOpts.method,
+    ...defaultOpts,
+    ...options,
     body: { itemId },
   })
 }
diff --git a/lib/bigcommerce/cart/use-update-item.tsx b/lib/bigcommerce/cart/use-update-item.tsx
index 78dd1bb84..bcad7ab3a 100644
--- a/lib/bigcommerce/cart/use-update-item.tsx
+++ b/lib/bigcommerce/cart/use-update-item.tsx
@@ -28,8 +28,8 @@ export const fetcher: HookFetcher<Cart | null, UpdateItemBody> = (
   }
 
   return fetch({
-    url: options?.url ?? defaultOpts.url,
-    method: options?.method ?? defaultOpts.method,
+    ...defaultOpts,
+    ...options,
     body: { itemId, item },
   })
 }
diff --git a/lib/bigcommerce/schema.d.ts b/lib/bigcommerce/schema.d.ts
index eae1c8187..361d45a30 100644
--- a/lib/bigcommerce/schema.d.ts
+++ b/lib/bigcommerce/schema.d.ts
@@ -1653,6 +1653,30 @@ export enum CurrencyCode {
   Zwr = 'ZWR',
 }
 
+export type GetLoggedInCustomerQueryVariables = Exact<{ [key: string]: never }>
+
+export type GetLoggedInCustomerQuery = { __typename?: 'Query' } & {
+  customer?: Maybe<
+    { __typename?: 'Customer' } & Pick<
+      Customer,
+      | 'entityId'
+      | 'firstName'
+      | 'lastName'
+      | 'email'
+      | 'company'
+      | 'customerGroupId'
+      | 'notes'
+      | 'phone'
+      | 'addressCount'
+      | 'attributeCount'
+    > & {
+        storeCredit: Array<
+          { __typename?: 'Money' } & Pick<Money, 'value' | 'currencyCode'>
+        >
+      }
+  >
+}
+
 export type CategoryTreeItemFragment = {
   __typename?: 'CategoryTreeItem'
 } & Pick<
diff --git a/lib/bigcommerce/use-customer.tsx b/lib/bigcommerce/use-customer.tsx
new file mode 100644
index 000000000..549fd3fa1
--- /dev/null
+++ b/lib/bigcommerce/use-customer.tsx
@@ -0,0 +1,41 @@
+import { ConfigInterface } from 'swr'
+import { HookFetcher } from '@lib/commerce/utils/types'
+import useCommerceCustomer, { CustomerInput } from '@lib/commerce/use-customer'
+import type { Customer, CustomerData } from './api/customers'
+
+const defaultOpts = {
+  url: '/api/bigcommerce/customer',
+  method: 'GET',
+}
+
+export type { Customer }
+
+export const fetcher: HookFetcher<CustomerData | null, CustomerInput> = (
+  options,
+  { cartId },
+  fetch
+) => {
+  return cartId ? fetch({ ...defaultOpts, ...options }) : null
+}
+
+export function extendHook(
+  customFetcher: typeof fetcher,
+  swrOptions?: ConfigInterface
+) {
+  const useCustomer = () => {
+    const cart = useCommerceCustomer<CustomerData | null>(
+      defaultOpts,
+      [],
+      customFetcher,
+      { revalidateOnFocus: false, ...swrOptions }
+    )
+
+    return cart
+  }
+
+  useCustomer.extend = extendHook
+
+  return useCustomer
+}
+
+export default extendHook(fetcher)
diff --git a/lib/bigcommerce/use-login.tsx b/lib/bigcommerce/use-login.tsx
new file mode 100644
index 000000000..d2b86a827
--- /dev/null
+++ b/lib/bigcommerce/use-login.tsx
@@ -0,0 +1,49 @@
+import { useCallback } from 'react'
+import { HookFetcher } from '@lib/commerce/utils/types'
+import useCommerceLogin from '@lib/commerce/use-login'
+import type { LoginBody } from './api/customers/login'
+
+const defaultOpts = {
+  url: '/api/bigcommerce/customers/login',
+  method: 'POST',
+}
+
+export type LoginInput = LoginBody
+
+export const fetcher: HookFetcher<null, LoginBody> = (
+  options,
+  { email, password },
+  fetch
+) => {
+  if (!(email && password)) {
+    throw new Error(
+      'A first name, last name, email and password are required to login'
+    )
+  }
+
+  return fetch({
+    ...defaultOpts,
+    ...options,
+    body: { email, password },
+  })
+}
+
+export function extendHook(customFetcher: typeof fetcher) {
+  const useLogin = () => {
+    const fn = useCommerceLogin<null, LoginInput>(defaultOpts, customFetcher)
+
+    return useCallback(
+      async function login(input: LoginInput) {
+        const data = await fn(input)
+        return data
+      },
+      [fn]
+    )
+  }
+
+  useLogin.extend = extendHook
+
+  return useLogin
+}
+
+export default extendHook(fetcher)
diff --git a/lib/bigcommerce/use-signup.tsx b/lib/bigcommerce/use-signup.tsx
new file mode 100644
index 000000000..68183aa6c
--- /dev/null
+++ b/lib/bigcommerce/use-signup.tsx
@@ -0,0 +1,49 @@
+import { useCallback } from 'react'
+import { HookFetcher } from '@lib/commerce/utils/types'
+import useCommerceSignup from '@lib/commerce/use-signup'
+import type { SignupBody } from './api/customers/signup'
+
+const defaultOpts = {
+  url: '/api/bigcommerce/customers/signup',
+  method: 'POST',
+}
+
+export type SignupInput = SignupBody
+
+export const fetcher: HookFetcher<null, SignupBody> = (
+  options,
+  { firstName, lastName, email, password },
+  fetch
+) => {
+  if (!(firstName && lastName && email && password)) {
+    throw new Error(
+      'A first name, last name, email and password are required to signup'
+    )
+  }
+
+  return fetch({
+    ...defaultOpts,
+    ...options,
+    body: { firstName, lastName, email, password },
+  })
+}
+
+export function extendHook(customFetcher: typeof fetcher) {
+  const useSignup = () => {
+    const fn = useCommerceSignup<null, SignupInput>(defaultOpts, customFetcher)
+
+    return useCallback(
+      async function signup(input: SignupInput) {
+        const data = await fn(input)
+        return data
+      },
+      [fn]
+    )
+  }
+
+  useSignup.extend = extendHook
+
+  return useSignup
+}
+
+export default extendHook(fetcher)
diff --git a/lib/bigcommerce/wishlist/use-add-item.tsx b/lib/bigcommerce/wishlist/use-add-item.tsx
index 862041bbd..9bbbe009e 100644
--- a/lib/bigcommerce/wishlist/use-add-item.tsx
+++ b/lib/bigcommerce/wishlist/use-add-item.tsx
@@ -17,8 +17,8 @@ export const fetcher: HookFetcher<Wishlist, AddItemBody> = (
   fetch
 ) => {
   return fetch({
-    url: options?.url ?? defaultOpts.url,
-    method: options?.method ?? defaultOpts.method,
+    ...defaultOpts,
+    ...options,
     body: { wishlistId, item },
   })
 }
diff --git a/lib/bigcommerce/wishlist/use-remove-item.tsx b/lib/bigcommerce/wishlist/use-remove-item.tsx
index ca9648d35..05f9744cb 100644
--- a/lib/bigcommerce/wishlist/use-remove-item.tsx
+++ b/lib/bigcommerce/wishlist/use-remove-item.tsx
@@ -19,8 +19,8 @@ export const fetcher: HookFetcher<Wishlist | null, RemoveItemBody> = (
   fetch
 ) => {
   return fetch({
-    url: options?.url ?? defaultOpts.url,
-    method: options?.method ?? defaultOpts.method,
+    ...defaultOpts,
+    ...options,
     body: { wishlistId, itemId },
   })
 }
diff --git a/lib/bigcommerce/wishlist/use-wishlist.tsx b/lib/bigcommerce/wishlist/use-wishlist.tsx
index 1d93609f0..d60660c05 100644
--- a/lib/bigcommerce/wishlist/use-wishlist.tsx
+++ b/lib/bigcommerce/wishlist/use-wishlist.tsx
@@ -4,6 +4,7 @@ import type { Wishlist } from '../api/wishlist'
 
 const defaultOpts = {
   url: '/api/bigcommerce/wishlists',
+  method: 'GET',
 }
 
 export type { Wishlist }
@@ -18,7 +19,8 @@ export const fetcher: HookFetcher<Wishlist | null, WishlistInput> = (
   fetch
 ) => {
   return fetch({
-    url: options?.url,
+    ...defaultOpts,
+    ...options,
     body: { wishlistId },
   })
 }
diff --git a/lib/commerce/api/index.ts b/lib/commerce/api/index.ts
index 6c4bf0544..38ed70d4a 100644
--- a/lib/commerce/api/index.ts
+++ b/lib/commerce/api/index.ts
@@ -14,8 +14,4 @@ export interface CommerceAPIFetchOptions<V> {
   preview?: boolean
 }
 
-// TODO: define interfaces for all the available operations
-
-// export interface CommerceAPI {
-//   getAllProducts(options?: { query: string }): Promise<any>;
-// }
+// TODO: define interfaces for all the available operations and API endpoints
diff --git a/lib/commerce/use-customer.tsx b/lib/commerce/use-customer.tsx
new file mode 100644
index 000000000..e33587dcf
--- /dev/null
+++ b/lib/commerce/use-customer.tsx
@@ -0,0 +1,30 @@
+import { responseInterface, ConfigInterface } from 'swr'
+import Cookies from 'js-cookie'
+import type { HookInput, HookFetcher, HookFetcherOptions } from './utils/types'
+import useData from './utils/use-data'
+import { useCommerce } from '.'
+
+export type CustomerResponse<T> = responseInterface<T, Error>
+
+export type CustomerInput = {
+  cartId: string | undefined
+}
+
+export default function useCustomer<T>(
+  options: HookFetcherOptions,
+  input: HookInput,
+  fetcherFn: HookFetcher<T | null, CustomerInput>,
+  swrOptions?: ConfigInterface<T | null>
+) {
+  // TODO: Replace this with the login cookie
+  const { cartCookie } = useCommerce()
+
+  const fetcher: typeof fetcherFn = (options, input, fetch) => {
+    input.cartId = Cookies.get(cartCookie)
+    return fetcherFn(options, input, fetch)
+  }
+
+  const response = useData(options, input, fetcher, swrOptions)
+
+  return response as CustomerResponse<T>
+}
diff --git a/lib/commerce/use-login.tsx b/lib/commerce/use-login.tsx
new file mode 100644
index 000000000..2a251fea3
--- /dev/null
+++ b/lib/commerce/use-login.tsx
@@ -0,0 +1,5 @@
+import useAction from './utils/use-action'
+
+const useLogin = useAction
+
+export default useLogin
diff --git a/lib/commerce/use-signup.tsx b/lib/commerce/use-signup.tsx
new file mode 100644
index 000000000..08ddb22c0
--- /dev/null
+++ b/lib/commerce/use-signup.tsx
@@ -0,0 +1,5 @@
+import useAction from './utils/use-action'
+
+const useSignup = useAction
+
+export default useSignup
diff --git a/lib/commerce/utils/use-action.tsx b/lib/commerce/utils/use-action.tsx
index ef68a7641..e60cae06b 100644
--- a/lib/commerce/utils/use-action.tsx
+++ b/lib/commerce/utils/use-action.tsx
@@ -9,9 +9,7 @@ export default function useAction<T, Input>(
   const { fetcherRef } = useCommerce()
 
   return useCallback(
-    function addItem(input: Input) {
-      return fetcher(options, input, fetcherRef.current)
-    },
+    (input: Input) => fetcher(options, input, fetcherRef.current),
     [fetcher]
   )
 }
diff --git a/lib/commerce/utils/use-data.tsx b/lib/commerce/utils/use-data.tsx
index fa2b6175c..c8e31657f 100644
--- a/lib/commerce/utils/use-data.tsx
+++ b/lib/commerce/utils/use-data.tsx
@@ -9,9 +9,15 @@ export default function useData<T, Input = any>(
   swrOptions?: ConfigInterface<T>
 ) {
   const { fetcherRef } = useCommerce()
-  const fetcher = (url?: string, query?: string, ...args: any[]) => {
+  const fetcher = (
+    url?: string,
+    query?: string,
+    method?: string,
+    ...args: any[]
+  ) => {
     return fetcherFn(
-      { url, query },
+      { url, query, method },
+      // Transform the input array into an object
       args.reduce((obj, val, i) => {
         obj[input[i][0]!] = val
         return obj
@@ -23,7 +29,9 @@ export default function useData<T, Input = any>(
   const response = useSWR(
     () => {
       const opts = typeof options === 'function' ? options() : options
-      return opts ? [opts.url, opts.query, ...input.map((e) => e[1])] : null
+      return opts
+        ? [opts.url, opts.query, opts.method, ...input.map((e) => e[1])]
+        : null
     },
     fetcher,
     swrOptions
diff --git a/pages/api/bigcommerce/customers.ts b/pages/api/bigcommerce/customers/index.ts
similarity index 100%
rename from pages/api/bigcommerce/customers.ts
rename to pages/api/bigcommerce/customers/index.ts
diff --git a/pages/api/bigcommerce/customers/login.ts b/pages/api/bigcommerce/customers/login.ts
new file mode 100644
index 000000000..b64b2252a
--- /dev/null
+++ b/pages/api/bigcommerce/customers/login.ts
@@ -0,0 +1,3 @@
+import loginApi from '@lib/bigcommerce/api/customers/login'
+
+export default loginApi()
diff --git a/pages/api/bigcommerce/customers/signup.ts b/pages/api/bigcommerce/customers/signup.ts
new file mode 100644
index 000000000..d8be5512f
--- /dev/null
+++ b/pages/api/bigcommerce/customers/signup.ts
@@ -0,0 +1,3 @@
+import signupApi from '@lib/bigcommerce/api/customers/signup'
+
+export default signupApi()