> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://contentful.com/developers/docs/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://contentful.com/_mcp/server.

# Extensibility

## Docs

- [App Framework](https://contentful.com/developers/docs/extensibility/app-framework/overview.md): An introduction to building apps with Contentful's App Framework | Managing and distributing through custom and marketplace apps
- [Create a custom app](https://contentful.com/developers/docs/extensibility/app-framework/tutorial.md): An introduction to building apps for Contentful | Install an app to a space | Choose content types for your app to interact with
- [Building a backend app](https://contentful.com/developers/docs/extensibility/app-framework/app-identities-and-events.md): How to use app identities and events to allow an app to act outside the context of the web app. App interaction with Contentful's Content Management API.
- [Request verification](https://contentful.com/developers/docs/extensibility/app-framework/request-verification.md): Verify requests to your backend are coming from your app | Establishing a signing secret | Signing requests | Key rotation
- [Create a configuration screen](https://contentful.com/developers/docs/extensibility/app-framework/app-configuration.md): Learn how to create a configuration screen for your custom app.
- [Create an app to support Custom External References](https://contentful.com/developers/docs/extensibility/app-framework/custom-external-references-example-tutorial.md): An introduction to building Functions to support Custom External References for Contentful
- [Create an app to support Native external references](https://contentful.com/developers/docs/extensibility/app-framework/native-external-references-example-tutorial.md): A tutorial on how to create an app supporting Native external references
- [Recommendations for AI app building](https://contentful.com/developers/docs/extensibility/app-framework/ai-recommendations.md): General best practices for AI-assisted App building that apply to any AI tool, including limitations and restrictions.
- [Strategies and prompting](https://contentful.com/developers/docs/extensibility/app-framework/ai-strategies-and-prompting.md): AI strategies and prompting for app development, including feature planning, UI prototyping, and test generation.
- [Deploy a custom app](https://contentful.com/developers/docs/extensibility/app-framework/deploy-app.md): An introduction to deploying apps for Contentful.
- [Hosting an app](https://contentful.com/developers/docs/extensibility/app-framework/hosting-an-app.md): Learn more about the different options of how to host an app | Hosting an app with Contentful or externally | Static site hosting
- [Converting an extension into an app](https://contentful.com/developers/docs/extensibility/app-framework/migrating-extension-to-app.md): Learn about the benefits of apps and migrate your existing UI extension in a few steps to an app. Publishing an app to the marketplace.
- [Publishing an app](https://contentful.com/developers/docs/extensibility/app-framework/publishing-an-app.md): How to get your app listed on the Contentful Marketplace | Maintenance and support | Best practices in development | Security | Legal terms
- [Customize the location field editor](https://contentful.com/developers/docs/extensibility/app-framework/customizing-location-field.md): Learn how to customize the appearance of the location field editor in the web app via Contentful apps | Creating a custom location field
- [Customizing sidebar](https://contentful.com/developers/docs/extensibility/app-framework/customizing-sidebar.md): Learn how to customize the appearance of the sidebar next to an entry in the web app and Contentful apps | Creating a custom sidebar
- [Working with Functions](https://contentful.com/developers/docs/extensibility/app-framework/working-with-functions.md): Learn how to create, update, delete, view, and manage Contentful Functions.
- [Work with apps in Release context](https://contentful.com/developers/docs/extensibility/app-framework/working-with-releases.md): Learn how to make your apps compatible with Contentful Timelines and implement opt-out mechanisms for release-scoped entries.
- [App SDK Reference](https://contentful.com/developers/docs/extensibility/app-framework/sdk.md): The SDK reference guide for Apps and UI Extensions | Inclusion | Initialization | Locations | Fields and Entries | Content types
- [Create Contentful App](https://contentful.com/developers/docs/extensibility/app-framework/create-contentful-app.md): Creating a new app with create-contentful-app | AppDefinition | Local development | Deploying with Contentful | Programmatic app management
- [GitHub Action](https://contentful.com/developers/docs/extensibility/app-framework/github-action.md): GitHub Action to deploy Contentful apps
- [Libraries](https://contentful.com/developers/docs/extensibility/app-framework/libraries.md): Speed up the development of apps using our libraries | Node.js apps toolkit | DAM app base | E-commerce app base
- [Field Editors](https://contentful.com/developers/docs/extensibility/app-framework/field-editors.md): All editorial components that you can find in the Contentful Web application | Field editors | Documentation | Contribution guide
- [Forma 36](https://contentful.com/developers/docs/extensibility/app-framework/forma-36.md): Forma 36 - The Contentful Design System | An open source design system by Contentful created with the intent to reduce developer overhead
- [React Apps Toolkit](https://contentful.com/developers/docs/extensibility/app-framework/react-apps-toolkit.md): React hooks to simplify building your next React based app for Contentful | Installation and available features
- [App Actions](https://contentful.com/developers/docs/extensibility/app-framework/app-actions.md): App actions allow apps to securely communicate with each other and easily extend the user interface.
- [App Bundle](https://contentful.com/developers/docs/extensibility/app-framework/app-bundle.md): An App Bundle belongs to an AppDefinition and is an entity that is used when hosting an app on the Contentful App Framework.
- [App Definition](https://contentful.com/developers/docs/extensibility/app-framework/app-definition.md): An AppDefinition is the entity that represents an app in Contentful. Containing general app information for visibility, installation and settings enablement.
- [App Events](https://contentful.com/developers/docs/extensibility/app-framework/app-events.md): App events allow you to define HTTP endpoints that should be called in response to changes to your entries, content types, or assets.
- [App Locations](https://contentful.com/developers/docs/extensibility/app-framework/locations.md): Understanding where your app can be rendered in Contentful | Locations | App Configuration | Page locations | Dialog | Entries
- [App Installation](https://contentful.com/developers/docs/extensibility/app-framework/app-installation.md): An App Installation is an entity type that indicates if an app described by an App Definition is installed in a space environment.
- [App Identity](https://contentful.com/developers/docs/extensibility/app-framework/app-identity.md): App identities allow apps to interact with the Contentful as an independent entity, similar to a user.
- [App Keys](https://contentful.com/developers/docs/extensibility/app-framework/app-keys.md): An App Key is an entity that represents a key pair, which can be used by an app to make a signed request to Contentful.
- [App Parameters](https://contentful.com/developers/docs/extensibility/app-framework/app-parameters.md): Use app parameters to separate code from configuration | What are parameters | Definitions
- [Editor Interfaces](https://contentful.com/developers/docs/extensibility/app-framework/editor-interfaces.md): An editor interface represents the look and feel of content type fields in the web app | Settings | Custom widgets | Sidebar | Default configuration
- [Target State](https://contentful.com/developers/docs/extensibility/app-framework/target-state.md): Target State is the understanding of where your app is rendered. It is responsible specific fields, sidebars and editors in the web app.
- [Access Grant](https://contentful.com/developers/docs/extensibility/app-framework/access-grant.md): Access Grant is an entity that is used to manage which organization can install an App from the App Framework.
- [Functions](https://contentful.com/developers/docs/extensibility/app-framework/functions.md): Functions are serverless workloads that run on Contentful's infrastructure to provide enhanced flexibility and customization.
- [Resource Entities](https://contentful.com/developers/docs/extensibility/app-framework/resource-entities.md): Learn how to use Resource Entities to extend Contentful with native external references. Understand how resource providers and resource types work together to connect your app with external services.
- [Field editors](https://contentful.com/developers/docs/extensibility/field-editors/overview.md): Understanding what is a field editor and how to use our field editor components to create a custom entry editor.
- [Example - Customize a field editor](https://contentful.com/developers/docs/extensibility/field-editors/example-customize-field-editor.md): An example how to customize an individual field editor | Get the editor you need and use it as a base for your own custom development
- [OAuth](https://contentful.com/developers/docs/extensibility/oauth.md): Creating an OAuth 2.0 application in the case of building a public integration that requests access to other Contentful user's data | Requesting access tokens
- [Overview](https://contentful.com/developers/docs/concepts/webhooks.md): Webhooks are HTTP callbacks which can be used to send notifications when data in Contentful is changed.
- [Webhook headers](https://contentful.com/developers/docs/extensibility/webhooks/headers.md): An introduction to webhook headers.
- [Webhook filters](https://contentful.com/developers/docs/extensibility/webhooks/filters.md): An introduction to webhook filters.
- [Webhook transformations](https://contentful.com/developers/docs/extensibility/webhooks/transformations.md): An introduction to webhook transformations.
- [Webhook signing secrets](https://contentful.com/developers/docs/extensibility/webhooks/secrets.md): An introduction to webhook signing secrets.
- [AWS Webhook configuration](https://contentful.com/developers/docs/extensibility/webhooks/aws-webhook-configuration.md): An introduction to integrating a webhook with AWS.
- [Content events](https://contentful.com/developers/docs/extensibility/webhooks/content-events.md): Reference for content events which trigger webhooks.
- [Action events](https://contentful.com/developers/docs/extensibility/webhooks/action-events.md): Reference for action events which trigger webhooks.
- [Configure a webhook](https://contentful.com/developers/docs/extensibility/webhooks/configure-webhook.md): An introduction to creating and configuring a Webhook.
- [Activity log](https://contentful.com/developers/docs/extensibility/webhooks/activity-log.md): An introduction to the Activity Log for Webhook observability.
- [Webhook templates](https://contentful.com/developers/docs/extensibility/webhooks/webhook-templates.md): Using Contentful Webhook Templates
- [Request Verification](https://contentful.com/developers/docs/extensibility/webhooks/request-verification.md): Configuring a webhook signing secret and verifying incoming signed webhook requests.
- [List webhooks in a space](https://contentful.com/developers/docs/extensibility/webhooks/list-webhooks.md): An introduction to viewing webhooks configured in a space.