Many platforms offer similar quality to Suno but are much less troublesome for automation:

• Riffusion: Good quality, no official API but the GUI can be automated with selenium if you know what you're doing.
• Mureka: Quality matching Suno, the official API starts at $1000/month at a rate of 3 cents/song. You can get 1600 songs for $30/month using the GUI but you'll have to automate it yourself or pay extra 10$/month to use an unofficial API.
• TemPolor: Less quality than Suno but quite cheap, for $30/month, you get unlimited number of songs. The official API starts at $300/month for 10,000 songs.

Feel free to share other working solutions.

Also if you need help integrating any of these solutions feel free to reach out at towardautomation@gmail.com.