https://developer.mapquest.com/documentation/api/icons/
Icons API | MapQuest Developer Documentation
The portal for developers to use MapQuest APIs. Find documentation to use our geo-spatial APIs and make maps using our mobile and javascript SDKs.
icons apideveloper documentationmapquest
https://developers.icons8.com/
Icon API Icons8 - Access Icons via REST API | Production-Ready Design Resources
design resourcesiconapiaccessvia
https://favicon.is/
Favicon.is - Fast & Free Favicon API for Developers | Get Website Icons
Quickly retrieve website favicons with our free API. Simple integration for developers, designers and webmasters to access any website's icon.
api for developersfaviconfastfreeget