> 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.

# JavaScript client libraries

> Our JavaScript client library gives you access to the Contentful APIs and their features | Access to the Content Delivery and Management API for JavaScript

Our JavaScript SDK client libraries give you access to our [APIs](/references/api-basics) and their features.

### Content Delivery API client library

This JavaScript SDK client library interacts with the Content Delivery API, a read-only API for retrieving content from Contentful. All content, both JSON and binary, is fetched from the server closest to a user's location using our global CDN.

* [View JavaScript SDK on GitHub](https://github.com/contentful/contentful.js)
* [Client library reference](https://contentful.github.io/contentful.js)
* [Try out the browser client library with JSFiddle](https://jsfiddle.net/contentful/kefaj4s8/)

### Content Management API client library

This JavaScript SDK client library interacts with the Content Management API, and allows you to create, edit, manage, and publish content. The API also offers tools for managing editorial teams and cooperation.

* [View JavaScript SDK on GitHub](https://github.com/contentful/contentful-management.js)
* [Client library reference](https://contentful.github.io/contentful-management.js)

### Support and maintenance

We follow a structured support policy for our JavaScript SDK client libraries (`contentful`, `contentful-management`).

**Active support** — The latest major version of each SDK receives full active support, including new features, bug fixes, security patches, and performance improvements. We recommend always using the latest major version in production.

**Maintenance period** — When a new major version is released, the previous major version enters a **6-month maintenance period**. During this time, only the following updates are provided:

* **Critical bug fixes** — issues that prevent core functionality from working as expected
* **Security patches** — fixes for known security vulnerabilities

No new features or minor improvements will be backported to previous versions.

**End of life** — After the 6-month maintenance window, previous major versions are no longer supported. Existing installations will continue to work, but no further updates will be released. We strongly recommend upgrading before the maintenance period ends.

For the full policy, see the [support policy in the contentful-management.js repo](https://github.com/contentful/contentful-management.js/blob/master/SUPPORT.md).

> Our JavaScript client library gives you access to the Contentful APIs and their features | Access to the Content Delivery and Management API for JavaScript