Developer Doc- https://developer.paytm.com/docs/opencart/
Github Repo - https://github.com/paytm/Paytm_Opencart_Plugin

Welcome to the official Paytm Payment Gateway extention for Opencart. Paytm Payment Gateway is ideal for Opencart.it allows them to give their customers a seamless, super-fast checkout experience backed by cutting-edge payments technology that powers India’s largest payments platform. Accept payments from over 100+ payment sources including credit cards, debit cards, netbanking from 50+ banks (including HDFC & SBI), UPI, wallets and Buy-now-pay-later options. Here are a few reasons why Opencart merchants should choose Paytm Payment Gateway.

- Largest scale: Preferred by 330M+ consumers in India.
- India’s most reliable PG: Trusted by India’s biggest online brands such as Uber, Flipkart, Zomato, Airtel, IRCTC, LIC and many more.
- Industry best prices guaranteed: 2x more affordable than other payment gateways with 0% transaction fees on UPI & Rupay payments.
- Boost conversions: Affordability options like EMI and Paytm Postpaid to boost conversions.
- Superior technology: Industry best success rates & 99.99% Up-time, Capable of supporting 3x more transactions per second than other payment gateways.
- Superfast next day settlements, even on holidays and weekends.
- Powerful dashboard: Get payment analytics at your fingerprints. Get insights by payment source and customer cohorts.
- Instant refunds: Initiate refunds seamlessly with just a click right from your Paytm for business dashboard.