---
title: "Serve Audio Mp3"
method: GET
path: "/v1/audio/{key}.mp3"
---

# Serve Audio Mp3

`GET /v1/audio/{key}.mp3`

## Request

- Base URL: `https://api.storyflo.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.storyflo.com/v1/audio/{key}.mp3`
- Auth: none declared

Sibling of ``/v1/audio/{key}.wav`` for the MP3 encoding.

MP3 is the canonical R2 upload format for new renders as of 2026-06-10,
replacing the WAV master to free ~95% of R2 bucket space (WAV was 96%
of the 10 GB free-tier cap). Apple Podcasts / Spotify ingest both accept
audio/mpeg (MP3); Opus is the web-player format for Chrome/Firefox/Safari 17+.

Filesystem backend (dev): streams the local .mp3 file if present.
R2 backend: 302-redirects to the R2 object (public bucket URL or
1-hour presigned URL, same as the .wav and .opus routes).

## Path parameters

- `key` string, required

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/storyflo/apis/storyflo-inference-router.md) · [All operations](https://skmtc.dev/storyflo/apis/storyflo-inference-router/llms.txt) · [OpenAPI document](https://skmtc.dev/storyflo/apis/storyflo-inference-router/revisions/c3a1a735ac7a?raw)