While working on this project, I couldn’t find the Spotify API calls I needed. At the time, I was looking for the following:
1) Search function that returns Artist Name, song name, song ID, external URL (handy for listening to the full song), explicit flag (True or False), preview (30-second clip), and a cover image for each song.
2) All of the above plus audio features for the searched songs. Audio features include acousticness, danceability, energy, instrumentalness, key, liveness, etc. These features can be used to create visualizations and predict similar songs.
3) I was also asked to create a prediction model to retrieve a desired number of similar songs. The model needed to use audio features to suggest similar songs.
All results needed to be in a readable JSON format for the backend team to use.
Register Spotify for Developers account
Before getting into the code you have to register an account at Spotify for Developer and create an app in order to get Client ID and Client Secret keys. In edit settings add Redirect URIs. I added http://127.0.0.1:5000/callback/ and https://sp-search.herokuapp.com/callback/.
Note: You need to change URIs to your own localhost and to the host you will deploy your APIs to.
By the end of the project, I created 3 APIs. The first searches for a track, the second searches for a track and returns 10 tracks with audio features, and the third returns the 4 most similar songs based on audio features using K-Nearest Neighbors. I deployed the APIs on Heroku and shared them with the backend team.
You can find the full code here