# API Documentation An OpenApi spec of the SSO Authorization API. See subpages for individual endpoints. *** Endpoints are divided into two categories: * **OAuth v2.0**: Authorizatio server endpoints, supporting the OAuth flow * **Authorization**: Resource server endpoint, where clients can download user data, in our case a `vp_token` --- # Agent Instructions: 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://docs.teranode.group/tng-identity-documentation/tng-identity-sso/sso-api/api-documentation.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.