Pegar:
CLIENT_ID
CLIENT_SECRET

Argentina: https://www.mercadopago.com/mla/herramientas/aplicaciones
Brazil: https://www.mercadopago.com/mlb/ferramentas/aplicacoes
Mexico: https://www.mercadopago.com/mlm/herramientas/aplicaciones
Venezuela: https://www.mercadopago.com/mlv/herramientas/aplicaciones
Colombia: https://www.mercadopago.com/mco/herramientas/aplicaciones
Chile: https://www.mercadopago.com/mlc/herramientas/aplicaciones


Customized checkout

Configure your credentials

Get your ACCESS_TOKEN in the following address:
Argentina: https://www.mercadopago.com/mla/account/credentials
Brazil: https://www.mercadopago.com/mlb/account/credentials
Mexico: https://www.mercadopago.com/mlm/account/credentials
Venezuela: https://www.mercadopago.com/mlv/account/credentials
Colombia: https://www.mercadopago.com/mco/account/credentials