How to monetise AI features

01 / TWO MODELS

Two models

Choose based on what people pay for. If cost tracks how much someone uses the AI, charge for usage with credits, so people who use it more pay more. If the value is having the feature, charge for access with a plan. A common setup is a paid tier that includes a monthly credit allowance, which combines both.

Sell credits

Price each AI tool in credits and sell packs. Each person pays in proportion to what they run. Best for expensive or variable AI calls.

Sell a plan

Require access on premium tools and sell a subscription that grants it. People pay a fixed amount for access, so revenue is predictable. Best when the feature itself is the upgrade.

02 / SELLING CREDITS

Sell credit packs

Give each AI tool a credit price, then let people buy packs. Every call spends from their balance, and the purchase is a normal payment.

Buy a credit packJavaScript

await g.payments.buy("credits-500");        // a configured product
const { balance } = await g.credits.balance();

Credits sit on a grant, and credit packs never expire. See how charging credits works.

03 / SELLING A PLAN

Premium tools behind a subscription

Require access on your premium AI tools, then sell a plan that grants it. The person subscribes through Stripe, and their plan decides which tools they can run.

Subscribe, then check the planJavaScript

await g.subscriptions.checkout("pro");                 // start checkout
const sub = await g.subscriptions.mine();             // { plan, status } or null
// A tool that requires "access:pro" runs only when the plan grants it.

04 / HOW THE MONEY FLOWS

Where the money goes

Payments go to your own provider account. Stripe is built in, any provider that signs its webhooks to a supported standard connects through a relay, and App Store and Play purchases come through RevenueCat. Gemmein records who holds what, and who is on which plan, from the provider's signed webhook.

AI-written checkout code often grants access on the success redirect, which anyone can fake. Gemmein grants access and credits only when the signed webhook arrives, so they follow a completed payment. This is built in.

05 / FOR YOUR CODING AGENT

Prompt for your coding agent

Paste this into Cursor, Claude, Bolt or Lovable so your agent sets up payments correctly.

Prompt for your coding agentCopy and paste

Read https://docs.gemmein.com/llms.txt. I want to monetise the AI features in my app. Show me both models: selling credit packs that AI tools spend (g.payments.buy, g.credits.balance) and putting premium tools behind a paid plan (g.subscriptions.checkout, g.subscriptions.mine, requiring access). Explain that the money goes to my own payment provider account and that access is granted on the signed payment webhook and never on the redirect.

npx gemmein devRead the getting-started guide

06 / FAQ

Frequently asked questions

Does Gemmein take a cut of payments?

No. Gemmein never holds, moves or processes money.