/lovable-integrations

Lovable and Stripe integration: Step-by-Step Guide 2025

Learn how to integrate Lovable with Stripe in simple, step-by-step instructions. Set up secure, seamless payments to boost your business efficiency.

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How to integrate Lovable with Stripe?

 

Setting Up Your Stripe API Keys

 
  • Create a new file named config.ts in your project’s root directory.
  • Insert your Stripe API keys into this file. Replace the placeholders with your actual keys.
  • 
export const STRIPESECRETKEY = 'YOURSTRIPESECRET_KEY';
export const STRIPEPUBLISHABLEKEY = 'YOURSTRIPEPUBLISHABLE_KEY';
  • This file will be used by all other files that need access to your Stripe keys.

 

Adding the Stripe Library (Dependency) Without a Terminal

 
  • Since Lovable doesn’t have a terminal for installing dependencies, manually add the Stripe library via a script tag.
  • Open your main HTML file (usually index.html).
  • Add the following script tag inside the <head> or just before the closing </body> tag:
  •
  • This script loads Stripe’s JavaScript library that you can use for client-side integration.

 

Creating the Stripe Integration File

 
  • Create a new file named stripeIntegration.ts in your project’s source directory.
  • Add the following TypeScript code which initializes Stripe using your secret key from the configuration file:
  • 
import Stripe from 'stripe';
import { STRIPESECRETKEY } from './config';


    const stripe = new Stripe(STRIPESECRETKEY, {
      apiVersion: '2020-08-27',
    });
    

    export default stripe;


  • This file sets up the Stripe instance for server-side operations.

 

Creating a Checkout Session API Endpoint

 
  • Create a new file named createCheckoutSession.ts in your source directory.
  • Add the following code to create a checkout session using the Stripe instance. This endpoint will be called by your application to start a payment session:
  • 
import type { Request, Response } from 'express';
import stripe from './stripeIntegration';


    export const createCheckoutSession = async (req: Request, res: Response) => {
      try {
        const session = await stripe.checkout.sessions.create({
          paymentmethodtypes: ['card'],
          mode: 'payment',
          line_items: [{
            price_data: {
              currency: 'usd',
              product_data: {
                name: 'Test Product',
              },
              unit_amount: 2000,
            },
            quantity: 1,
          }],
          success_url: 'https://your-success-url.com/success',
          cancel_url: 'https://your-cancel-url.com/cancel',
        });
        res.status(200).json({ sessionId: session.id });
      } catch (error: any) {
        res.status(500).json({ error: error.message });
      }
    };


  • This file defines an API endpoint that will create and return a Stripe checkout session.

 

Connecting the API Endpoint to Your Application Router

 
  • Locate your project’s routing file (often named router.ts or similar) where you define your API endpoints.
  • Add a new route for the checkout session endpoint. Insert the following code snippet:
  • 
import express from 'express';
import { createCheckoutSession } from './createCheckoutSession';


    const router = express.Router();
    

    router.post('/create-checkout-session', createCheckoutSession);
    

    export default router;


  • This code integrates the new API endpoint into your application so that requests to /create-checkout-session are handled accordingly.

 

Implementing Client-Side Integration (Optional)

 
  • If you wish to use Stripe’s client library for handling the checkout process on the front end, add the following JavaScript code to your client-side TypeScript file.
  • The code below uses the publishable key from the configuration and triggers the checkout redirect:
  • 
import { loadStripe } from '@stripe/stripe-js';
import { STRIPEPUBLISHABLEKEY } from './config';


    const stripePromise = loadStripe(STRIPEPUBLISHABLEKEY);
    

    export const redirectToCheckout = async () => {
      const stripe = await stripePromise;
      if (!stripe) {
        console.error('Stripe failed to load.');
        return;
      }
    

      const response = await fetch('/create-checkout-session', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
      });
    

      const { sessionId } = await response.json();
    

      const { error } = await stripe.redirectToCheckout({ sessionId });
      if (error) {
        console.error('Stripe Checkout error', error);
      }
    };


  • Attach this function to a button or an event in your UI to initiate the checkout process when needed.

 

Testing Your Stripe Integration

 
  • When your project runs, trigger the client-side function (or send a POST request to the API endpoint) to generate a checkout session.
  • Upon successful session creation, Stripe will handle the payment process and redirect the user accordingly.
  • Ensure your success and cancel URLs are correctly set to receive Stripe’s callbacks.

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