---
title: "Concatenate ready chapter MP3s into one M4B audiobook"
method: POST
path: "/books/{bookId}/audiobook"
---

# Concatenate ready chapter MP3s into one M4B audiobook

`POST /books/{bookId}/audiobook`

## Request

- Base URL: `https://anthra.com/api/v1`
- URL: `https://anthra.com/api/v1/books/{bookId}/audiobook`
- Auth: HTTP bearer

Requires every chapter to be narrated first. Uploads to Blob and returns the URL.

## Response `200`

OK

---

[API](https://skmtc.dev/anthra/apis/anthra-api.md) · [All operations](https://skmtc.dev/anthra/apis/anthra-api/llms.txt) · [OpenAPI document](https://skmtc.dev/anthra/apis/anthra-api/revisions/d21f87c435bf?raw)