diff --git a/api/src/processing/request.js b/api/src/processing/request.js
index 7add3006..4287267c 100644
--- a/api/src/processing/request.js
+++ b/api/src/processing/request.js
@@ -38,19 +38,22 @@ export function createResponse(responseType, responseData) {
             case "redirect":
                 response = {
                     url: responseData?.u,
+                    filename: responseData?.filename
                 }
                 break;
 
             case "tunnel":
                 response = {
                     url: createStream(responseData),
+                    filename: responseData?.filename
                 }
                 break;
 
             case "picker":
                 response = {
                     picker: responseData?.picker,
-                    audio: responseData?.u
+                    audio: responseData?.u,
+                    audioFilename: responseData?.filename
                 }
                 break;
 
diff --git a/docs/api.md b/docs/api.md
index 2e7958ac..44186527 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -46,12 +46,15 @@ the response will always be a JSON object containing the `status` key, which wil
 |:-------------|:---------|:------------------------------------------------------------|
 | `status`     | `string` | `tunnel / redirect`                                         |
 | `url`        | `string` | url for the cobalt tunnel, or redirect to an external link  |
+| `filename`   | `string` | cobalt-generated filename for the file being downloaded     |
 
 ### picker response
-| key          | type     | values                                                      |
-|:-------------|:---------|:------------------------------------------------------------|
-| `status`     | `string` | `picker`                                                    |
-| `picker`     | `array`  | array of objects containing the individual media            |
+| key             | type     | values                                                                                           |
+|:----------------|:---------|:-------------------------------------------------------------------------------------------------|
+| `status`        | `string` | `picker`                                                                                         |
+| `audio`         | `string` | **optional** returned when an image slideshow (such as on tiktok) has a general background audio |
+| `audioFilename` | `string` | **optional** cobalt-generated filename, returned if `audio` exists                               |
+| `picker`        | `array`  | array of objects containing the individual media                                                 |
 
 #### picker object
 | key          | type      | values                                                      |
diff --git a/web/src/lib/types/api.ts b/web/src/lib/types/api.ts
index c7823639..4df054aa 100644
--- a/web/src/lib/types/api.ts
+++ b/web/src/lib/types/api.ts
@@ -18,6 +18,7 @@ export type CobaltErrorResponse = {
 
 type CobaltPartialURLResponse = {
     url: string,
+    filename: string,
 }
 
 type CobaltPickerResponse = {
@@ -28,6 +29,7 @@ type CobaltPickerResponse = {
         thumb?: string,
     }[];
     audio?: string,
+    audioFilename?: string,
 };
 
 type CobaltRedirectResponse = {