diff --git a/.gitignore b/.gitignore
index ee3811e..ec09171 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ node_modules
 dist
 coverage/
 .idea/
+tsconfig.tsbuildinfo
diff --git a/src/index.ts b/src/index.ts
index 7331747..ddb16cb 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,5 @@
 import shopifyAuth from "./auth";
+import {authenticateShopifyPage, authenticateShopifyAPI, NextShopifyApiRequest} from "./requireAuthentication";
 
 export default shopifyAuth;
 
@@ -7,5 +8,4 @@ export * from "./auth";
 export * from "./types";
 
 export { default as verifyRequest } from "./verify-request";
-
-export { default as authenticateShopifyPage } from "./requireAuthentication";
+export {authenticateShopifyPage, authenticateShopifyAPI, NextShopifyApiRequest};
diff --git a/src/requireAuthentication.ts b/src/requireAuthentication.ts
index 5bb56db..fbf42cc 100644
--- a/src/requireAuthentication.ts
+++ b/src/requireAuthentication.ts
@@ -1,32 +1,22 @@
-import {
-  GetServerSidePropsContext,
-} from "next";
+import { GetServerSidePropsContext } from "next";
 import { parseCookies } from "nookies";
 import verifyRequest from "./verify-request/verify-request";
+import type { NextApiRequest, NextApiResponse } from 'next';
 
 // Overwrite ServerResponse to allow `shopOrigin`
 interface GetServerSideShopifyPropsContext extends GetServerSidePropsContext {
   shopOrigin?: string;
 }
 
-
-export type GetServerSideProps<
-  P extends { [key: string]: any } = { [key: string]: any }
-> = (context: GetServerSideShopifyPropsContext) => Promise<{ props: P }>;
-
-const authenticateShopifyPage = async (
-  getServerSidePropsInner: GetServerSideProps = async () => ({ props: {} })
-) => {
-  const getServerSideProps: GetServerSideProps = async (ctx) => {
-    const pathname = new URL(ctx.resolvedUrl).pathname;
-
+export function authenticateShopifyPage(getServerSidePropsFunc?: Function) {
+  return async (ctx: GetServerSideShopifyPropsContext) => {
     const authRoute = "/api/shopify/auth";
     const fallbackRoute = "/login";
     const verifyTokenUrl = `${process.env.HOST}/api/shopify/verify-token`;
     const cookies = parseCookies(ctx);
     const shopOrigin = ctx.query.shop ?? cookies.shopOrigin;
 
-    if (pathname !== fallbackRoute) {
+    if (ctx.resolvedUrl !== fallbackRoute) {
       await verifyRequest({
         query: ctx.query,
         cookies,
@@ -36,17 +26,44 @@ const authenticateShopifyPage = async (
     }
 
     ctx.shopOrigin = shopOrigin as string;
+    if (getServerSidePropsFunc) {
+      const result = await getServerSidePropsFunc(ctx);
 
-    const result = await getServerSidePropsInner(ctx);
-
-    return {
-      props: {
-        shopOrigin,
-        ...result.props,
-      },
-    };
+      return {
+        props: {
+          shopOrigin,
+          ...result.props,
+        },
+      };
+    }
+    return { props: { shopOrigin } };
   };
-  return getServerSideProps;
+}
+
+export type NextShopifyApiRequest = NextApiRequest & {
+  shopOrigin?: string;
+  shopifyToken?: string;
+  shopifyAssociatedUser?: string;
+}
+
+export const authenticateShopifyAPI = (handler: (req: NextShopifyApiRequest, res: NextApiResponse) => Promise<void>) => async (req: NextShopifyApiRequest, res: NextApiResponse) => {
+  if (!req) {
+    throw new Error('Request is not available');
+  }
+
+  if (!res) {
+    throw new Error('Response is not available');
+  }
+
+  const authRoute = "/api/shopify/auth";
+  const fallbackRoute = "/login";
+  const verifyTokenUrl = `${process.env.HOST}/api/shopify/verify-token`;
+  await verifyRequest({ query: req.query, cookies: req.cookies, res, options: { authRoute, fallbackRoute, verifyTokenUrl } });
+
+  req.shopOrigin = req.cookies.shopOrigin;
+  req.shopifyToken = req.cookies.shopifyToken;
+  req.shopifyAssociatedUser = req.cookies.shopifyAssociatedUser;
+
+  return handler(req, res);
 };
 
-export default authenticateShopifyPage;
diff --git a/tsconfig.json b/tsconfig.json
index fb651d7..55986e3 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -21,7 +21,7 @@
     "declaration": true,
     "declarationMap": true,
     "skipLibCheck": true,
-    "downlevelIteration": true,
+    "downlevelIteration": true
   },
   "exclude": ["node_modules", "dist"]
 }