diff --git a/unit/api/application_resource.py b/unit/api/application_resource.py
index 683dfff6..29051e0f 100644
--- a/unit/api/application_resource.py
+++ b/unit/api/application_resource.py
@@ -61,3 +61,21 @@ def upload(self, request: UploadDocumentRequest):
             return UnitResponse[ApplicationDocumentDTO](DtoDecoder.decode(data), None)
         else:
             return UnitError.from_json_api(response.json())
+
+    def approve_sb(self, request: ApproveApplicationSBRequest):
+        url = f"sandbox/{self.resource}/{request.application_id}/approve"
+
+        payload = request.to_json_api()
+        response = super().post(url, payload)
+
+        if response.ok:
+            data = response.json().get("data")
+            included = response.json().get("included")
+            return UnitResponse(data, included)
+            # TODO need DTOs for this response
+            # if data["type"] == "individualApplication":
+            #     return UnitResponse[IndividualApplicationDTO](DtoDecoder.decode(data), DtoDecoder.decode(included))
+            # else:
+            #     return UnitResponse[BusinessApplicationDTO](DtoDecoder.decode(data), DtoDecoder.decode(included))
+        else:
+            return UnitError.from_json_api(response.json())
\ No newline at end of file
diff --git a/unit/models/application.py b/unit/models/application.py
index 60f5a5c9..98744681 100644
--- a/unit/models/application.py
+++ b/unit/models/application.py
@@ -258,3 +258,21 @@ def to_dict(self) -> Dict:
         if self.sort:
             parameters["sort"] = self.sort
         return parameters
+
+class ApproveApplicationSBRequest(UnitRequest):
+    def __init__(self, application_id: str):
+        self.application_id = application_id
+
+    def to_json_api(self) -> Dict:
+        payload = {
+            "data": {
+                "type": "applicationApprove",
+                "attributes": {
+                    "reason": "sandbox"
+                }
+            }
+        }
+        return payload
+
+    def __repr__(self):
+        json.dumps(self.to_json_api())