Flow Music API

June 3, 2026 (October 21, 2026)

This is a third-party API for Google Flow Music (formerly Producer AI, originally Riffusion) by Google Labs. It uses your Flow Music subscription: Free, Starter $8, Plus $24 or Member $64 a month (as of October 2026). Through a REST API and a hosted MCP server, it makes full songs with vocals or instrumentals on Lyria 3.5 and Lyria 3 Pro, then covers, remixes, extends and splits them into stems.

Models

Model	What it makes	Notes
Lyria 3.5 `lyria-3.5`	Songs from a prompt, sung with lyrics the model writes or your own, or instrumental	Google’s current flagship, songs up to about 3 minutes, one or two songs (an A/B pair) per request
Lyria 3 Pro `lyria-3-pro`	Songs from a prompt, sung or instrumental	The default when `model` is left out, so older integrations sound the same, at the same credits per song
Song edits	Cover, remix, extend and replace on either model	Restyle a song, re-sing it with new lyrics, add 1 to 300 seconds (songs of 5 minutes and more) or redo one section
Effects and stems	Audio effects and stems from any song	Trim, fade, gain, reverb, pan and equalizer, and four stems: drums, bass, vocals and other
Lyrics	Verse and chorus lyrics with a matching style prompt, no audio	Shape the layout with `structure`, then sing them with a song request
More	Cover art, image and audio uploads as style hints, your song list, mp3 downloads and credit usage	Every song also comes with m4a and wav links

MCP server

The hosted Flow Music MCP server gives Claude Code, Cursor, VS Code and other AI assistants 18 tools for songs, lyrics, extends, section replacements, covers, lyric remixes, effects and stems, with your useapi.net API token and nothing to install. The flowmusic-api repo also adds it in one step as a Claude Code plugin or a Gemini CLI extension.

Pricing

What one song costs on Google’s Gemini API and on each Flow Music subscription (as of October 2026). Each subscription comes with a monthly number of credits, and each song uses 5 of them, so a song costs its share of the subscription.

Model	Official API	Starter $8/m 3,000 cr/mo	Plus $24/m 10,000 cr/mo	Member $64/m 30,000 cr/mo
Lyria 3.5 full song	$0.08 per song	$0.013 / 5 cr 600 songs/mo	$0.012 / 5 cr 2,000 songs/mo	$0.011 / 5 cr 6,000 songs/mo
Lyria 3 Pro full song	$0.08 per song, Preview	$0.013 / 5 cr 600 songs/mo	$0.012 / 5 cr 2,000 songs/mo	$0.011 / 5 cr 6,000 songs/mo
Downloads mp3, wav, m4a and stems	—	$0 / 0 cr included	$0 / 0 cr included	$0 / 0 cr included

A free Flow Music account makes songs too, from its daily top-up credits, with both Lyria models and every download. Flow Music has its own plans: a Google AI subscription doesn’t include Flow Music credits.
Covers, remixes, extends, section replacements, effects and stems spend credits from the same subscription.
Paid plans can also buy extra credits while the subscription is active, and yearly billing is 25% off.

Every plan, monthly and yearly

Each request returns one or two songs (an A/B pair) at 5 credits a song. Every plan also gets daily top-up credits, so even Free makes a few songs each day. Max at once is how many generations Flow Music runs at the same time on one account, which is also the default maxJobs for that account.

Plan	Price a month	Credits a month	Songs a month	Per song	Max at once
Free	$0	daily top-ups only	—	free daily credits	2
Starter, monthly	$8	3,000	about 600	$0.013	8
Plus, monthly	$24	10,000	about 2,000	$0.012	12
Member, monthly	$64	30,000	about 6,000	$0.011	16
Starter, yearly	$6	3,000	about 600	$0.010	8
Plus, yearly	$18	10,000	about 2,000	$0.009	12
Member, yearly	$48	30,000	about 6,000	$0.008	16

Yearly rows show the price per month when billed yearly, 25% off.

One Google account, four APIs

The same Google AI plan powers several useapi.net APIs, each from its own allowance, so one Google account connected to all of them gets the most out of the plan:

Google Flow API: Veo 3.1 and Omni 1.1 Flash video, Nano Banana images up to 4K, from Flow credits.
Google Vids API: Omni 1.1 Flash video with avatars and voices, from the Vids allowance, which does not use Flow credits.
Gemini Notebook API (NotebookLM API): chat with sources, Deep Research and every Studio output, from the Gemini Notebook usage limits.
Flow Music API: full songs with Lyria in Google Flow Music, which signs in with a Google account too, on Flow Music’s own plans.

Each API is set up on its own setup page, and one useapi.net subscription covers all of them.

Start using the API

A single $15/month subscription covers every API on useapi.net — one token, all services. You connect up to 3 accounts per service, each with its own website subscription, and useapi.net handles the REST API, load balancing, and polling. Need more accounts? Each extra subscription is $10/month and adds 3 more accounts per service.

Subscribe — $15/month Pay with crypto

Pricing and volume options — full refund within the first 14 days if you have fewer than 50 successful generations. Already subscribed? Change the quantity in the Stripe Customer Portal instead of buying again.

Run several Flow Music accounts

Each useapi.net subscription connects 3 Flow Music accounts, up to 50 in total. Song requests don’t need email: each one goes to an account with a free slot within its maxJobs, which starts at the plan’s own limit (2 on Free, 8 on Starter, 12 on Plus, 16 on Member) and can be set from 1 to 16 with POST accounts. When every account is busy you get 429, so wait and send it again. Pass email to run a song on a specific account. Edits run on the account that holds the song, and uploaded references keep a song on the account they were uploaded to. GET /jobs shows the load on every account and GET /accounts/email its live credit balance.

Every song and edit can post its finished record to your webhook with replyUrl, or you poll GET /jobs/jobid in async mode, so a song that takes 40 to 150 seconds needs no open connection.

Questions

Is there a Google Flow Music API?

Through useapi.net, yes. Google offers Flow Music only as a website, with no public Flow Music API (as of October 2026), and the useapi.net Flow Music API runs it over REST on your Flow Music subscription: full songs with vocals on Lyria 3.5 and Lyria 3 Pro, and edits of them. Node.js examples are on GitHub at useapi/flowmusic-api.

How much does the Flow Music API cost?

Through useapi.net, a Lyria 3.5 song costs about $0.013 on Flow Music Starter at $8 a month and $0.011 on Member, against $0.08 a song on Google’s Gemini API (as of October 2026). Billed yearly, Member brings it to about $0.008. The Free plan’s daily credits work too. The price table shows every plan.

Do I need a Flow Music API key?

Through useapi.net, you call Flow Music with our API token, since Google issues no Flow Music API key. You connect the Google account you use at flowmusic.app once through Setup Flow Music, which signs in with Google in a guided browser, with no tokens to copy. You need no Google Cloud project and no Gemini API billing.

Is the Flow Music API the same as the Lyria 3 Gemini API?

Through useapi.net, you get more than the Lyria Gemini API: the Flow Music API drives the Flow Music app with your Google account and Flow Music subscription, and it edits the songs it makes, with covers, lyric remixes, extends, section replacements, effects and stems. Lyria on Google’s Gemini API makes each song in a single pass with no editing afterwards, and has no free tier (as of October 2026).

Setup Flow Music
LLM-friendly API spec Feed this to your LLM to build integrations
Claude Code skill A drop-in useapi.net skill for Claude Code, and a rule for Cursor
Postman collection (August 12, 2026)
MCP Server Make songs, edits and stems from Claude Code, Cursor, VS Code and other MCP clients
GitHub examples Node.js: full songs with Lyria 3.5 and Lyria 3 Pro, plus the Claude Code plugin and Gemini CLI extension