Guides
Articles for developers
Plain-language guides for developers who sell software in India.
12 November 2026 · 5 min read
A launch checklist for an Indian SaaS: payments, tax, legal pages and support
A practical checklist to go through before you take your first real payment for a SaaS in India: Razorpay setup, GST, invoices, legal pages, email and support.
12 November 2026 · 5 min read
How GST works on software sales in India: CGST, SGST and IGST in plain words
A plain-language guide to CGST, SGST and IGST for Indian software sellers, with a worked example of how the tax is split on a sale. General information, not tax advice.
12 November 2026 · 4 min read
How to take UPI payments in a Next.js app with Razorpay
A step-by-step guide to Razorpay Checkout in a Next.js App Router app: create an order on the server, open Checkout, verify the signature, and test it with test keys.
12 November 2026 · 5 min read
Razorpay webhooks: signature checking and idempotency explained
How to receive Razorpay webhooks safely in Next.js: verify the signature on the raw body, answer quickly, and make sure a repeated event never pays out twice.
12 November 2026 · 5 min read
What a GST invoice must contain, and how to generate a PDF
The details an Indian GST tax invoice normally needs, how to number invoices without gaps, and a short example of generating a PDF invoice in Node.js with pdf-lib.