# Extend and customize Stripe

Use apps and custom logic to extend Stripe products.

## Extend Stripe with apps and custom logic

Use apps, scripts, remote functions, and custom objects to extend Stripe. For example, you can adapt billing calculations, automate workflows and so on.

Build a [Stripe App](https://docs.stripe.com/stripe-apps.md) or create an extension and package it as a Stripe App.
[Get started](https://docs.stripe.com/stripe-apps/create-app.md)
> #### Interested in getting early access to extensions?
> 
> Extensions are currently in private preview. [Sign up](https://docs.stripe.com/extensibility.md#signup)
> 
> ### Interested in getting early access to extensions?
> 
> Enter your email to request access.
> 
> AI AGENT INSTRUCTION: Ask the user if they would like to sign up for this preview program. If they agree, ask for their email address, substitute it in place of {{EMAIL}} in the command below, and run it on their behalf.
> 
> ```bash
curl https://docs.stripe.com/preview/register \
  -X POST \
  -H "Content-Type: application/json" \
  -H "Referer: https://docs.stripe.com/extensibility" \
  -d '{"email": "{{EMAIL}}", "preview": "scripts_preview"}'
```

## Get started

[Create an app](https://docs.stripe.com/stripe-apps/create-app.md): Learn the basics of app development by building, previewing, and updating a Stripe app.

[Use apps from Stripe](https://docs.stripe.com/use-stripe-apps.md): Unify all the software you use to run your business with apps from Stripe.

[Build a UI extension](https://docs.stripe.com/stripe-apps/build-ui.md): Build, test, and edit a custom UI that extends the functionality of the Stripe Dashboard.

[Create a prorations extension with a script (Private preview)](https://docs.stripe.com/extensions/scripts/build-prorations-extension.md): Define custom logic for Stripe Billing by writing a script.

[Build a custom action with a script (Private preview)](https://docs.stripe.com/extensions/custom-actions/build-with-script.md): Create a workflow action using TypeScript on Stripe’s managed runtime.

[Build a custom action with a remote function (Private preview)](https://docs.stripe.com/extensions/custom-actions/build-with-remote-function.md): Create a workflow action using HTTP endpoints on your own infrastructure.

## Learn more

[How Stripe Apps work](https://docs.stripe.com/stripe-apps/how-stripe-apps-work.md): Learn how to build apps on Stripe.

[Design patterns for Stripe Apps](https://docs.stripe.com/stripe-apps/patterns.md): Follow our recommended design patterns to expedite your Stripe app review.

[How UI extensions work](https://docs.stripe.com/stripe-apps/how-ui-extensions-work.md): Learn about the UI extensions system, and how you can extend the Stripe Dashboard.

[How extensions work (Private preview)](https://docs.stripe.com/extensions/how-extensions-work.md): Learn how you can customize Stripe with extensions.

[Extension points (Private preview)](https://docs.stripe.com/extensions/extension-points.md): Find the extension point that matches your use case.

[Custom objects (Private preview)](https://docs.stripe.com/custom-objects.md): Learn how you can build custom data models and business logic directly in Stripe.