diff --git a/fern/apis/fai/openapi.json b/fern/apis/fai/openapi.json
index 8d582538a..9d91493ea 100644
--- a/fern/apis/fai/openapi.json
+++ b/fern/apis/fai/openapi.json
@@ -2067,6 +2067,16 @@
               "type": "string",
               "title": "Org Name"
             }
+          },
+          {
+            "name": "preview",
+            "in": "query",
+            "required": false,
+            "schema": {
+              "type": "boolean",
+              "default": false,
+              "title": "Preview"
+            }
           }
         ],
         "responses": {
@@ -2202,6 +2212,45 @@
         ]
       }
     },
+    "/settings/reindex-preview-callback": {
+      "post": {
+        "tags": ["Settings"],
+        "summary": "Reindex Preview Callback",
+        "description": "Handle callback from Upstash QStash when preview reindex completes.",
+        "operationId": "reindex_preview_callback",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/UpstashCallbackRequest"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "Successful Response",
+            "content": {
+              "application/json": {
+                "schema": {}
+              }
+            }
+          },
+          "422": {
+            "description": "Validation Error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/HTTPValidationError"
+                }
+              }
+            }
+          }
+        },
+        "x-fern-audiences": ["internal"]
+      }
+    },
     "/slack/integrations": {
       "post": {
         "tags": ["Slack"],
@@ -3880,6 +3929,116 @@
         "required": ["guidance"],
         "title": "UpdateGuidanceResponse"
       },
+      "UpstashCallbackRequest": {
+        "properties": {
+          "status": {
+            "type": "integer",
+            "title": "Status"
+          },
+          "sourceMessageId": {
+            "type": "string",
+            "title": "Sourcemessageid"
+          },
+          "url": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Url"
+          },
+          "method": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Method"
+          },
+          "sourceHeader": {
+            "anyOf": [
+              {
+                "additionalProperties": {
+                  "items": {
+                    "type": "string"
+                  },
+                  "type": "array"
+                },
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Sourceheader"
+          },
+          "sourceBody": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Sourcebody"
+          },
+          "notBefore": {
+            "anyOf": [
+              {
+                "type": "integer"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Notbefore"
+          },
+          "createdAt": {
+            "anyOf": [
+              {
+                "type": "integer"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Createdat"
+          },
+          "scheduleId": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Scheduleid"
+          },
+          "callerIP": {
+            "anyOf": [
+              {
+                "type": "string"
+              },
+              {
+                "type": "null"
+              }
+            ],
+            "title": "Callerip"
+          }
+        },
+        "type": "object",
+        "required": ["status", "sourceMessageId"],
+        "title": "UpstashCallbackRequest",
+        "description": "Callback payload from Upstash QStash when a queued job completes."
+      },
       "ValidationError": {
         "properties": {
           "loc": {