AppleScript (JXA) that fetches a list of channels from SomaFM and plays the selected channel.

Play_SomaFM.scpt

class SomaFM {
  constructor(app) {
    const jsonStr = app.doShellScript('curl https://somafm.com/channels.json');
    const { channels } = JSON.parse(jsonStr);
    this._opts = channels.map(c => ({ name: c.title, url: c.playlists[0].url}));
    this._names = this._opts.map(opt => opt.name);
  }

  get names() { return [ ...this._names]; }

  getURL(name) {
    const idx = this._names.indexOf(selection);
    return this._opts[idx].url;
  }
}

const app = Application.currentApplication();
app.includeStandardAdditions = true;

const somaFM = new SomaFM(app);
const selection = app.chooseFromList(somaFM.names, { withTitle: 'SomaFM', withPrompt: 'Choose a Station' })[0];

if (selection != null) {
  const url = somaFM.getURL(selection);
  const qt = Application('QuickTime Player');
  qt.openURL(url);
}