Book-to-audiobook API

Spec sheet

Privacy

Sats4AI says it does not create customer accounts or sell usage data, and describes keeping operational records needed to deliver and protect the service.Read 7 Oct 2026 · sats4ai.com

Support

The company says it can be reached through its contact page and Nostr.Read 7 Oct 2026 · sats4ai.com

API job handling

Audiobook jobs run asynchronously and can be checked through a status URL or an optional callback webhook.Read 7 Oct 2026 · sats4ai.com

Book conversion

The service turns EPUB, PDF, or TXT files into chaptered M4B audiobooks.Read 7 Oct 2026 · sats4ai.com

Chapter markers

Completed audiobooks are downloadable as M4B files with chapter markers.Read 7 Oct 2026 · sats4ai.com

Developer integrations

Sats4AI documents L402 over HTTP, MCP, and WebLN as integration options for its services.Read 7 Oct 2026 · sats4ai.com

File handling

Uploaded files are kept for 72 hours to address conversion faults, then deleted.Read 7 Oct 2026 · sats4ai.com

Input limits

The upload form accepts EPUB, PDF, or TXT files up to 50 MB and recommends EPUB because PDF and TXT results vary.Read 7 Oct 2026 · sats4ai.com

Language coverage

The product page says audiobooks can be narrated in 602 languages.Read 7 Oct 2026 · sats4ai.com

Payment and access

The service charges per use in Bitcoin Lightning sats and requires no account or card.Read 7 Oct 2026 · sats4ai.com

Voice cloning

The product page offers audiobook narration in the user's own cloned voice.Read 7 Oct 2026 · sats4ai.com

Voice options

Users choose among three quality tiers and select a voice before generation.Read 7 Oct 2026 · sats4ai.com

Plans and prices

Every Book-to-audiobook API plan and price →

Where Specifiction places it

• AI audiobook generators#24 of 257.0