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Implementing Subscription Logic in Your SaaS App

An in-depth look at logics in subscription

GV

Gopal Verma

April 20, 2025 (3mo ago)

5 min read
Implementing Subscription Logic in Your SaaS App

Monetizing your SaaS product means you need a robust subscription system. Let's explore how to integrate one using Stripe.

⚙️ What You’ll Need

  • Stripe account
  • Stripe Node.js SDK
  • Webhooks for status sync

🛠️ Backend Code (Express.js)

const stripe = require('stripe')(process.env.STRIPE_SECRET);
 
app.post('/create-checkout-session', async (req, res) => {
  const session = await stripe.checkout.sessions.create({
    payment_method_types: ['card'],
    line_items: [{ price: 'price_123', quantity: 1 }],
    mode: 'subscription',
    success_url: `${YOUR_DOMAIN}/success`,
    cancel_url: `${YOUR_DOMAIN}/cancel`,
  });
 
  res.json({ id: session.id });
});

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