Book-to-audiobook API
Book-to-audiobook API: A multilingual audiobook API with chapter controls, voice cloning, and M4B export. Ranked #9 of 25 in AI Audiobook Generators by our editors (7.0/10); pricing: Paid; best for developers needing multilingual audiobook APIs.
At a glance
- Editor score7.0 / 10
- PricingPaid
- Best forDevelopers needing multilingual audiobook APIs
- Free planNo
- Chapter handlingYes
- Facts checked20 Sep 2026
Where it wins
- Handles EPUB, PDF, and TXT files with automatic chapter extraction
- Supports translation, voice cloning, playback-speed control, and 602 languages
- Exports M4B audiobooks with chapter markers and asynchronous job polling
Where it doesn't
- No free plan is available
- Pricing varies by character count, voice tier, and optional translation
- Bitcoin satoshi payments may not suit teams requiring fiat billing
Our verdict on Book-to-audiobook API
Book-to-audiobook API converts EPUB, PDF, and TXT files into full audiobooks through web and API access. It is aimed at developers building multilingual audiobook workflows that need more than basic text-to-speech. The service extracts and detects chapters, allows selected chapters and front or back matter to be filtered, and returns completed work as M4B files with chapter markers. It also supports voice selection, playback-speed control, optional translation before narration, and asynchronous job status with polling.
The pricing structure is organized around three paid plans. Wide-coverage multilingual provides multilingual narration at 100 characters per sat. Premium emotion-control adds emotion-control narration at 50 characters per sat. Voice clone supports narration from a supplied voice sample at 10 characters per sat. Pricing is denominated in Bitcoin satoshis, and the minimum charge is 500 sats per job. The exact charge varies with character count, voice tier, and optional translation, so the most suitable tier depends on the required voice capabilities and language workflow.
Its strongest differentiators are chapter-aware processing, translation before narration, voice cloning, and broad language coverage stated at 602 languages. HTTP and MCP interfaces support API-oriented implementations, while integrations include MCP, Lightning Network, and WebLN. Bitcoin Lightning payments are part of the service model, and an account or API key is not required. Choose it when chapter filtering, multilingual output, asynchronous processing, or M4B delivery matter. A conventional text-to-speech service may be a better fit for teams seeking a free plan, fiat-denominated pricing, or a narrower voice-generation workflow.
Book-to-audiobook API pricing
All 3 Book-to-audiobook API plans and prices →
Book-to-audiobook API fact sheet
| Free plan | No |
|---|---|
| Paid from | Not verified |
| Chapter handling | Yes |
| Audiobook export | Yes |
| Voice cloning | Yes |
| Commercial rights | Not verified |
| Monthly character allowance | Not verified |
| Voice languages | 602 languages |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 3 integrations: MCP, Lightning Network, WebLN See all → |
| Pricing | Paid (source) |
| Website | sats4ai.com |
| Facts checked | 20 Sep 2026 |
Book-to-audiobook API integrations
Book-to-audiobook API lists 3 integrations on its own site.
- MCP
- Lightning Network
- WebLN
See all Book-to-audiobook API integrations →
Alternatives to Book-to-audiobook API
- SpokenA full-cast audiobook studio with voice cloning, editing, mastering, and distribution integrations.9.6
- AudibloomA flexible audiobook generator for authors who want guided creation at accessible monthly prices.9.0
- StoryVoxA budget-friendly web tool with cloning, mastering, and chapter-level controls.8.5
See all Book-to-audiobook API alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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