> For the complete documentation index, see [llms.txt](https://symphony-1.gitbook.io/cloud9/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://symphony-1.gitbook.io/cloud9/master.md).

# Introduction to Cloud9 APIs

Cloud9 provides a suite of standardized APIs that supports a wide array of functionalities and integrates with best-of-breed apps and services to provide our customers a variety of solutions that fit their needs. Take these simple steps to integrate Cloud9 into other apps and services and streamline your workflows.

### REST API Authentication

To learn more about how Cloud9 securely interacts with other apps and services and authenticates API requests, continue onto the REST API Authentication guide below:

{% content-ref url="/pages/upSGdjn3C0ViVCJyJ87o" %}
[REST API Authentication](/cloud9/rest-api-authentication.md)
{% endcontent-ref %}

### Role- Based Access Control for Cloud9 API keys

To learn more about how Cloud9 restricts access to resources for individual API keys, continue onto the Role- Based Access Control guide below:

{% content-ref url="/pages/sE2RC5O7RHeZRxIzcpG8" %}
[Role-Based Access Control for Cloud9 API keys](/cloud9/role-based-access-control-for-cloud9-api-keys.md)
{% endcontent-ref %}

### Cloud9 API Suite

To learn more about all the publicly available Cloud9 APIs and endpoints, continue onto the Cloud9 API Suite guide below:

{% content-ref url="/pages/7WZ9MNnV3FShazZm2sLU" %}
[Cloud9 API Suite](/cloud9/cloud9-api-suite.md)
{% endcontent-ref %}