Get list of related tracks HTTP API SoundCloud - soundcloud

Question

I wasn't able to find anything fitting in HTTP API documentation.
As I know, there's some tracks popping out in SC widget after current track is finished, therefore there is some related tracks functionality in SC itself, yet can we access it via API?
I.e get a list of tracks, related to given track's id.

Answer 1

Disclaimer: This is an undocumented endpoint and is subject to change at anytime by SoundCloud.
There is an undocumented endpoint that allows you to access a track's related sounds:
HTTP GET: https://api.soundcloud.com/tracks/[TRACK_ID]/related?client_id=[YOUR_CLIENT_ID]
You didn't specify a language, so i'm just going to give a high-level overview on how to use the endpoint.
First, get your track URL. I'll use this one as an example: https://soundcloud.com/msmrsounds/ms-mr-hurricane-chvrches-remix
Then hit the resolve endpoint to get the track_id.
HTTP GET: https://api.soundcloud.com/resolve.json?url=https%3A%2F%2Fsoundcloud.com%2Fmsmrsounds%2Fms-mr-hurricane-chvrches-remix&client_id=[YOUR_CLIENT_ID]
Response:
{
"status": "302 - Found",
"location": "https://api.soundcloud.com/tracks/90787841.json?client_id=[YOUR_CLIENT_ID]"
}
Next, hit the related endpoint with your track_id.
HTTP GET: https://api.soundcloud.com/tracks/90787841/related?client_id=[YOUR_ClIENT_ID]
The full response will give you up to 50 related tracks. The response is too large to post, but it's just an array of tracks.
[
{
"kind": "track",
"id": 112741336,
"created_at": "2013/09/27 09:40:29 +0000",
"user_id": 59817646,
"duration": 215896,
"commentable": true,
"state": "finished",
"original_content_size": 38068298,
"last_modified": "2015/04/04 20:17:24 +0000",
"sharing": "public",
"tag_list": "CHVRCHES Whitney Houston Zane Lowe",
"permalink": "chvrches-its-not-right-but-its",
"streamable": true,
"embeddable_by": "all",
"downloadable": false,
"purchase_url": null,
"label_id": null,
"purchase_title": null,
"genre": "Electronic",
"title": "CHVRCHES - It's Not Right But It's Okay (Whitney Houston Cover)",
"description": "CHVRCHES - It's Not Right But It's OK (Whitney Houston Cover) from Zane's Live Sessions",
"label_name": "",
"release": "",
"track_type": "recording",
"key_signature": "",
"isrc": "",
"video_url": null,
"bpm": null,
"release_year": null,
"release_month": null,
"release_day": null,
"original_format": "wav",
"license": "all-rights-reserved",
"uri": "https://api.soundcloud.com/tracks/112741336",
"user": {
"id": 59817646,
"kind": "user",
"permalink": "uknewmusic",
"username": "UKNewMusic",
"last_modified": "2013/09/27 09:38:04 +0000",
"uri": "https://api.soundcloud.com/users/59817646",
"permalink_url": "http://soundcloud.com/uknewmusic",
"avatar_url": "https://a1.sndcdn.com/images/default_avatar_large.png"
},
"permalink_url": "http://soundcloud.com/uknewmusic/chvrches-its-not-right-but-its",
"artwork_url": "https://i1.sndcdn.com/artworks-000058757165-6tnuep-large.jpg",
"waveform_url": "https://w1.sndcdn.com/XkEffI5hwjZ7_m.png",
"stream_url": "https://api.soundcloud.com/tracks/112741336/stream",
"playback_count": 680326,
"download_count": 0,
"favoritings_count": 9241,
"comment_count": 199,
"attachments_uri": "https://api.soundcloud.com/tracks/112741336/attachments",
"policy": "ALLOW"
},
{ ...
}
]