Mention Swagger UI

Rewritten-docs.md

@@ -3082,15 +3082,6 @@ The REST API is a PHP application run in an HTTP server. Its purpose is
 providing controlled access to the evaluation backend and storing the state of
 the application.
 
-@todo: what to mention
-	- basic - GET, POST, JSON, Header, ...
-	- endpoint structure, Swager UI
-	- handling requests, preflight, checking roles with annotation
-	- Uploading files and file storage - one by one upload endpoint. Explain
-	  different types of the Uploaded files.
-	- Automatic detection of the runtime environment - users must submit
-	  correctly named files, assuming the RTE from the extensions
-
 ### Used Technologies
 
 We chose to use PHP in version 7.0, which was the most recent version at the
@@ -3326,6 +3317,20 @@ the `/login` endpoint group.
 An advantage of this approach is being able control the authentication process
 completely instead of just receiving session data through a global variable.
 
+### Accessing Endpoints
+
+The REST API has a [generated documentation](https://recodex.github.io/api/)
+describing detailed format of input values as well as response structures
+including samples.
+
+Knowing the exact format of the endpoints allows interacting directly with the
+API using any REST client available, for example `curl` or `Postman` Chrome
+extension. However, there is a generated [REST
+client](https://recodex.github.io/api/ui.html) directly for the ReCodEx API
+structure using Swagger UI tool. For each endpoint there is a form with boxes
+for all the input parameters including description and data type. The responses
+are shown as highlighted JSON. The authorization can be set for whole session at
+once using "Authorize" button at the top of the page.
 
 ### Permissions
 
@@ -3434,10 +3439,6 @@ validates the file and gives us access to all of the information through
 an interface of a class and not only using associative arrays. This is very
 similar to how the job configuration files are processed.
 
-## API Endpoints
-
-@todo: Tell the user about the generated API reference and how the
-Swagger UI can be used to access the API directly.
 
 ## Web Application