@atomicpoet See my post here for clarification on the clients bit:
https://cyberplace.social/@pcottle/112231536503756161
That being said, ML-generated alt text should be available in the API now! Just verified on my end. Your feedback is heard :) We've always exposed user-provided alt text but that's not always provided.
Let me know if you have any theories on why this URL can't be rendered.