Nextjs /api routing to /unknown only on render

I’ve deployed a nextjs app on render. When attempt to use /api, it instead routes to /undefined. why is this?
Here is my code:

  const checkout = async () => {
    try {
      const totalCost = cartItems.reduce((total, item) => total + item.product.price, 0);
      const items=stringifyCart()
      const response = await'/api',{cartItems: items, totalCost: totalCost},
        { headers: {'Content-Type': 'application/json'}},
        { withCredentials: true });
      window.location.href =;
    } catch (error) {
      console.error("error in cart async: ", error);
      alert('Something went wrong during checkout');


import express, { request } from 'express';
import bodyParser from 'body-parser';
import { Client, Environment } from 'square';
import {NextRequest, NextResponse} from 'next/server'
import axios from 'axios'

console.log("entered API")

const client = new Client({
  accessToken: process.env.SQUARE_ACCESS_TOKEN,
  environment: Environment.Production

export async function POST(req, res) {
  console.log("POST request received");
  try {
    const { cartItems, totalCost} = await req.json();
    const response = await client.checkoutApi.createPaymentLink({
      idempotencyKey: new Date().getTime().toString(),
      quickPay: {
        name: cartItems,
        priceMoney: {
          amount: totalCost * 100,
          currency: 'USD'
        locationId: process.env.SQUARE_LOCATION_ID
      checkoutOptions: {
        askForShippingAddress: true,
        acceptedPaymentMethods: {
          applePay: true,
          googlePay: true,
          cashAppPay: true,
          afterpayClearpay: true

    return NextResponse.json({ url: response.result.paymentLink.url }, { status: 200 });
  } catch (error) {
    return NextResponse.json({ error: error.message }, { status: 500 });

It may be worth noting that i did not follow this guide Deploy a Next.js App | Render Docs to deploy my nextjs app, i simply grapped it from a github repo. This issue only occurs on render

Hi Baxter,

Can you confirm you’re running this NextJS service as a web service and not a static site? You would need the web service if you’re serving API routes.



It was a static site. Now, deploying a web service, I get the a deploy failed and the following issue I did not receive before:

Error: Could not find a production build in the 'dist' directory. Try building your app with 'next build' before starting the production server.

Jun 26 07:32:24 PM

Hi Baxter,

Did you add a build command (i.e. npm run build) to your web service that builds to the dist directory?