> For the complete documentation index, see [llms.txt](https://developer.tokeninc.com/token-developer-portal-1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.tokeninc.com/token-developer-portal-1/x-platform/integration-via-backend-old/common.md).

# Common

## API Environments 

Test environment base URL  <https://test-api.devtokeninc.com>&#x20;

The prod environment URL will be shared on request.&#x20;

## Authentication & Authorization &#x20;

Before consuming the related service APIs, you must get access tokens.&#x20;

Token X follows standard OAuth2.0 protocol. To authenticate your Application Token, share API credentials with you by mail.&#x20;

With API credentials, you must get access and refresh the token for Token X to authorize your Application securely.&#x20;

{% embed url="<https://sandbox.tokeninc.com/#b2a8bfe4-e92d-45ea-aa8a-5ce92edb1ed4>" %}
The API for getting access token
{% endembed %}

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