Does Instamojo support Magento?
Instamojo has a plugin for Magento. You can find the installation steps on the link mentioned below
https://www.magentocommerce.com/magento-connect/instamojo-payment-gateway.html
https://github.com/Instamojo/instamojo-magento-2
If you're facing some issue with plugin integration, please drop an email to support@instamojo.com stating the issue.
We have not mentioned the installation steps here since we constantly update the plugin in order to add features and ensure a seamless experience for our merchants.