Supported functions
NOTE: Functions are only available for Premium plans and Partners.
You can use the following types of Functions to extend Contentful:
App Event functions: These functions allow custom backend logic to be executed within the App Framework, ideal for various integrations and custom workflows.
App Action functions: These functions provide apps an easy way to expose generic capabilities to their own frontends as well as to other apps.
Functions on delivery (GraphQL): These functions are specifically designed to run in the path of GraphQL delivery requests, enabling dynamic content manipulations and real-time data integrations. See Custom external references and Native external references for more information.
Use cases
App Event functions
Integration with third-party services, complex workflow automation.
Allows apps to react to events in Contentful by filtering, transforming, or handling app events.
Replaces the need for a customer to build and support a backend service that would otherwise support these tasks.
App Action functions
Performing tasks often in response to a user interacting with some UI component in an app.
These tasks might include: custom backend business logic, Content Management API (CMA) interaction, or interaction with external systems.
Replaces the need for a customer to build and support a public API endpoint that would otherwise support these tasks.
Functions on delivery (GraphQL)
Real-time data integrations with:
Product Catalogs, E-commerce systems, Translation systems, Legacy CMS systems, Digital Asset Management platforms
Any other API
Content Enrichment: Enhance your content with additional information, metadata, or related data fetched from external sources to provide richer context.
Inline external media: Include images from third-party systems inline to reduce network requests.
Dynamic routing: Route your content requests to different sources or destinations based on conditions, enabling dynamic content delivery logic.
At a glance
Feature | Purpose | Execution context |
|---|---|---|
App Event functions | Custom backend logic and integrations | AppEvents / App Framework |
App Action functions | Custom backend logic and integrations | AppActions / App Framework |
Functions on delivery | Dynamic content integrations | GraphQL delivery path |
For more information and to get started, see our Developer Documentation for Functions. View our Example Apps and Function Templates on GitHub.
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