Convert a Substack post into a podcast
Substack already supports voice-overs you record yourself; the API offers an alternative for writers who would rather publish than record. Drop a post URL and ship an audio version alongside the email — same content, different format, zero studio time.
How it works
- Step 1Submit your Substack post
Send the Substack post to the AutoContent API as a URL, file upload, or pasted text. The API accepts most public sources directly and supports authenticated uploads for private content.
- Step 2Pick your tone and voices
Choose from 50+ AI voices and a handful of presets that shape pacing, formality, and length. Defaults work for most use cases — tweak when the AI podcast is heading somewhere brand-sensitive.
- Step 3Receive your AI podcast
Generation typically completes in under five minutes. The API returns the finished AI podcast plus a transcript, share URL, and metadata you can plug into your existing distribution stack.
Frequently asked questions
Does this conflict with Substack's own voice-over feature?
No — Substack accepts external mp3 uploads. Generate via the API and upload to the Substack post like any other voice-over.
Can I keep my voice-over feed on Apple/Spotify in sync?
Yes. The mp3 plus metadata produced by the API drops into the same RSS feed Substack publishes for podcast platforms.
Will paid-subscriber-only posts work?
You need to submit the post body. For paid posts, paste the content from your own subscribed view of the email.
Ready to convert your Substack post?
Generate AI podcasts programmatically via the AutoContent API. Per-request pricing — pay only for what you generate.