Mapbox comes with a free tier. Please refer to their pricing page to see if you'll fall under free usage of the API key - https://www.mapbox.com/pricing#maps
In order to use some of the features on our theme like the store locator you’ll need to create and update a Mapbox API key.
Visit Mapbox
Sign up for a new developer account
Create a new API key
Start by connecting your source repository and choosing the pages you want to publish.
You can then browse your documentation and ask questions about the content your team has shared.