> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

# [Build Apps](https://dev.wix.com/docs/api/get-menu-content?url=https%3A%2F%2Fdev.wix.com%2Fdocs%2Fbuild-apps&format=markdown.md)

## [Develop Your App](https://dev.wix.com/docs/build-apps/develop-your-app.md)


### [Auth](https://dev.wix.com/docs/build-apps/develop-your-app/auth.md)


- [About Authentication](https://dev.wix.com/docs/build-apps/develop-your-app/auth/about-authentication.md)

- [Authenticate Using OAuth](https://dev.wix.com/docs/build-apps/develop-your-app/auth/authenticate-using-oauth.md)

- [Authenticate on Behalf of a Wix User](https://dev.wix.com/docs/build-apps/develop-your-app/auth/authenticate-on-behalf-of-a-wix-user.md)

- [Verify Requests Received from Wix](https://dev.wix.com/docs/build-apps/develop-your-app/auth/verify-requests-received-from-wix.md)

- [Extract Identities From Backend Requests](https://dev.wix.com/docs/build-apps/develop-your-app/auth/extract-identities-from-backend-requests.md)

- [Custom Authentication (deprecated)](https://dev.wix.com/docs/build-apps/develop-your-app/auth/custom-authentication-deprecated.md)

#### [App Instances](https://dev.wix.com/docs/build-apps/develop-your-app/auth/app-instances.md)


- [About App Instances](https://dev.wix.com/docs/build-apps/develop-your-app/auth/app-instances/about-app-instances.md)

- [Identify the App Instance in Frontend Environments](https://dev.wix.com/docs/build-apps/develop-your-app/auth/app-instances/identify-the-app-instance-in-frontend-environments.md)

- [Identify the App Instance in Backend Environments](https://dev.wix.com/docs/build-apps/develop-your-app/auth/app-instances/identify-the-app-instance-in-backend-environments.md)

- [Parse the App Instance Query Parameter](https://dev.wix.com/docs/build-apps/develop-your-app/auth/app-instances/parse-the-app-instance-query-parameter.md)


#### [Permissions](https://dev.wix.com/docs/build-apps/develop-your-app/auth/permissions.md)


- [About Permissions](https://dev.wix.com/docs/build-apps/develop-your-app/auth/permissions/about-permissions.md)

- [Configure Permissions for Your App](https://dev.wix.com/docs/build-apps/develop-your-app/auth/permissions/configure-permissions-for-your-app.md)