API/REST-API.md

@@ -348,3 +348,37 @@ true
 </details>
 
 ---
+
+### Fetch File
+
+> Returns submission file's data string.
+
+| Method | Route | Content type | Authentication |
+|--------|-------|--------------|----------------|
+| GET | /challenge/fetchfile/{fileName} | - | Bearer token |
+
+<details>
+<summary>Example Responses</summary>
+
+```
+file data in base64 format
+```
+
+```json
+{
+    "statusCode": 404,
+    "error": "Challenge file not found",
+    "message": "Challenge file fileId:edb8b406-55e4-43d8-ba4c-88f9062f428e not found"
+}
+```
+
+```json
+{
+    "statusCode": 415,
+    "error": "File type invalid",
+    "message": "Given file incorrect format {type}"
+}
+```
+</details>
+
+---
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