# Set Up Online & Mobile Payment Gateway Integration

## Build an online and mobile payments solution using the PayPal JavaScript SDK and REST APIs.

### Checkout
Scalable checkout solutions for web and mobile

### Subscriptions
Add billing or recurring payments to your checkout

### Invoicing
Set up and send custom invoices

## Regional Solutions
Explore payment solutions targeted for specific countries/regions.

| [![Brazil](https://www.paypalobjects.com/devdoc/brazil.svg)](/docs/regional/br/) | [![Mexico](https://www.paypalobjects.com/devdoc/mexico.svg)](/docs/regional/mx/) |

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