Yes. The Icons8 API lets your users search and obtain assets and create projects with them. Plans are structured based on the volume of asset downloads and API calls. There is no free API tier — all plans are paid.
The API covers icons, illustrations, and photos. For music and sound effects, see the music API docs.
Pricing options are available on the Icons8 developers portal. Quick-start guides are available for integration support.
For free icon access without the API, you can download icons individually or as collections.