Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
demonodojo
commented
7 years ago
This should be very similar to paypal express integration
Mercado pago API documentation can be found here https://www.mercadopago.com.co/developers/es/api-docs/
There is a ruby SDK, that should be worthy to look at, though last commit is from Oct 2015 https://github.com/mercadopago/sdk-ruby