> 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 The prod environment URL will be shared on request. ## Authentication & Authorization Before consuming the related service APIs, you must get access tokens. Token X follows standard OAuth2.0 protocol. To authenticate your Application Token, share API credentials with you by mail. With API credentials, you must get access and refresh the token for Token X to authorize your Application securely. {% embed url="" %} The API for getting access token {% endembed %} ## ## --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://developer.tokeninc.com/token-developer-portal-1/x-platform/integration-via-backend-old/common.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.