Plan & API Key Guide

With or without an API key

Pro and Studio users bring their own API keys for Anthropic (prompt generation), Mureka (Audio Studio), and Runway (Reel Forge). Each service bills you directly — AMPA adds no markup. Starter users get prompts through Library Mode with no API key required.

How it works
🔑
BYOK — Bring Your Own Key (Pro & Studio)

Pro and Studio plans use BYOK across all three AI services: Anthropic for prompt generation (all 7 modules), Mureka for Audio Studio (track generation), and Runway for Reel Forge (image-to-video). Each key is configured once in Account Settings → API Keys. Each provider bills you directly at their own rates — AMPA adds zero markup.

✓ 3 services, 3 keys  ·  Full module access  ·  You control every budget

📚
Library Mode (Starter)

No API account needed. Starter plan users get 300 professional prompts per month through a smart combinatorial engine — genre descriptors, mood profiles, instrument palettes, and structure templates assembled without any external API call. Fixed cost, instant output.

✓ No API key  ·  300 prompts/month  ·  Predictable fixed cost

Plan comparison
Feature Starter Library Mode Pro Your Key Studio Your Key · Team
Monthly price €6.99/mo No API key €14.99/mo BYOK required €39.99/mo BYOK required
Annual price billed once/year €69.90/yr
save €13.98
€149.90/yr
save €29.98
€399.90/yr
save €79.98
Modules & Features
Monthly generations300 library promptsUnlimited (BYOK)Unlimited (BYOK)
API key requiredNot needed✓ Required✓ Required
🎵 Music Prompt Generator
🎲 Surprise Me!
🖼 Image Analysis
🎭 Morph Your Song
🔥 Album Forge up to 20 tracks✓ unlimited
🧬 Lyric Alchemy 8-step wizard
🔍 Style Explorer
📡 Daily Mood
🎵 Audio Studio BYOK Mureka key + credits✓ BYOK Mureka✓ BYOK Mureka
🎬 Reel Forge BYOK Runway key✓ BYOK Runway✓ BYOK Runway
Studio Exclusives
Team seats up to 3 members××
Priority API queue××
Direct support channel××
Early feature access××
Real cost estimator (BYOK plans)

With BYOK (Pro or Studio), your actual API cost depends on how many tracks you generate per month. Here's what you'd pay Anthropic directly at current Sonnet 4.6 pricing. Starter users have a fixed cost of €6.99/month regardless of volume.

Generations per month: 100
Anthropic API cost (Sonnet 4.6): ~€4.65
Pro plan fee (BYOK): €14.99
Total monthly cost (Pro BYOK): ~€19.64

Estimate based on ~€0.0465 per generation (Sonnet 4.6 avg: 500 input + 3000 output tokens). Actual cost varies by prompt complexity. Anthropic bills in USD; EUR conversion approximate. Starter Library Mode costs exactly €6.99/month for up to 300 prompts — no API cost at all.

How to get your Anthropic API key
1

Create an Anthropic account

Go to console.anthropic.com and sign up with your email. The account is free to create — you only pay for what you use.

2

Generate your API key

In the Console: API KeysCreate Key. Give it a name (e.g. "AMPA"). Your key starts with sk-ant-. Copy it immediately — Anthropic shows it only once.

3

Paste it into AMPA

In the app, find the 🔑 API Key bar just below the module tabs. Paste your key and press SAVE. The badge turns green: ✅ BYOK Active. Done.

4

Add credit to your Anthropic account

Go to Billing in the Console and add a payment method. You can start with $5 — at Sonnet 4.6 pricing that's roughly 100 generations. Anthropic offers auto-recharge above a threshold so you never run dry mid-session.

How to get your Mureka API key (Audio Studio)
5

Create a Mureka account

Go to platform.mureka.ai and sign up. Mureka is the AI music generation engine behind Audio Studio.

6

Generate your Mureka API key

In the Mureka dashboard: API KeysCreate Key. Copy the key immediately.

7

Add it in AMPA

In AMPA: Account Settings → API Keys → Mureka. Paste your key and save. Then buy AMPA audio credits to start generating tracks.

How to get your Runway API key (Reel Forge)
8

Create a Runway account

Go to app.runwayml.com/account/api. Runway Gen-4 is the image-to-video engine behind Reel Forge.

9

Generate your Runway API key

In the Runway dashboard under API: click Create Key. Copy it immediately.

10

Add it in AMPA and add Runway credits

In AMPA: Account Settings → API Keys → Runway. Paste your key and save. Add Runway credits directly in the Runway dashboard — Reel Forge consumes Runway credits at their standard rates (5s clip: ~25 credits, 10s clip: ~50 credits).

Frequently asked questions
Is my API key stored on AMPA's servers?
No. Your key lives exclusively in your browser's localStorage — it never leaves your device to AMPA servers. It's transmitted directly to the Anthropic API in the request header, encrypted by HTTPS. Clearing your browser data removes it.
What if I have a BYOK plan but don't set a key?
If you subscribe to Pro or Studio (BYOK plans) without setting a key, generations won't complete — the app will prompt you to add your key. The BYOK bar in the app makes this immediately visible.
Can I switch between Starter and Pro later?
Yes. You can upgrade from Starter to Pro at any time from Account Settings. The change takes effect from the next billing cycle. When upgrading you'll need to add an Anthropic API key — see the setup steps above. Downgrading to Starter follows the same process and takes effect at the next cycle.
Does the launch coupon AMPA30 work on all plans?
Yes — the coupon AMPA30 gives 30% off the first payment on any paid plan: Starter, Pro, and Studio. Valid until June 2026. Apply at checkout.
What model does AMPA use for BYOK generations?
All BYOK generations (Pro and Studio) use Claude Sonnet 4.6 by Anthropic — the current optimal balance of quality, speed and cost. Starter Library Mode generates prompts without any external AI model — the combinatorial engine runs entirely on our infrastructure.
With Starter, do unused monthly credits roll over?
No. Starter credits reset every 30 days from your billing date — regardless of how many you used. Annual billing locks the monthly price, it doesn't accumulate unused credits across months. 300 prompts per cycle, every cycle.
Do I need all three API keys to use AMPA?
No. The Anthropic key is required for all AI-powered generations (Pro and Studio plans). The Mureka key is only needed if you want to use Audio Studio. The Runway key is only needed if you want to use Reel Forge. You can add each key independently whenever you decide to use that feature.
How much do Mureka and Runway cost on top of AMPA?
Mureka charges per generation — Audio Studio also consumes AMPA audio credits (separate wallet, never expire). Runway charges per second of video: Gen-4 Turbo ~25 credits for 5s, ~50 for 10s; Gen-4 ~60 for 5s, ~120 for 10s. Both providers offer pay-as-you-go with no subscription required beyond your AMPA plan.

Ready to choose your plan?

Start with Starter if you want zero setup and a predictable flat cost. Go Pro or Studio if you want full AI access and unlimited generations.