Here is a short video (link to guide included) explaining how to consume more than 25 ArcGIS basemaps using OpenLayers and a free ArcGIS Platform account.
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- Check out this long list of resources to help you with ArcGIS development, APIs, SDKs, tools, and location services.
- This post gives a short overview of how to get started with using ArcGIS location services, including retrieving basemap layers, geocoding, routing, content management, and more.
- If you have built a mapping application with an open source client API that uses the legacy ArcGIS Online tile services, then it's time to update to the new ArcGIS basemap layer service.