diff --git a/docs/dev/rest-api/endpoints.md b/docs/dev/rest-api/endpoints.md
index 1f04afd9..10963597 100644
--- a/docs/dev/rest-api/endpoints.md
+++ b/docs/dev/rest-api/endpoints.md
@@ -397,6 +397,8 @@ Create a download job. Requires `service` and `title_id`; every other field is a
 | `proxy` / `no_proxy` / `no_proxy_download` | string / bool / bool | `null` / `false` / `false` | Proxy controls. |
 | `no_folder` / `no_source` / `no_mux` | boolean | `false` | Output/mux controls. |
 | `workers` | int | `null` | Threads per track. |
+| `adaptive_workers` | boolean | `false` | Scale segment workers to measured CDN throughput, up to the `workers` cap. |
+| `download_processes` | int | `1` | Split a track's segments across this many processes. Only engages for large batches. |
 | `downloads` | int | `1` | Concurrent tracks. |
 | `worst` | boolean | `false` | Lowest bitrate within quality. |
 | `best_available` | boolean | `false` | Fall back to best available. |
diff --git a/unshackle/core/api/download_manager.py b/unshackle/core/api/download_manager.py
index 147133fa..5a614ad2 100644
--- a/unshackle/core/api/download_manager.py
+++ b/unshackle/core/api/download_manager.py
@@ -586,6 +586,8 @@ def perform_download(
                 no_source=params.get("no_source", False),
                 no_mux=params.get("no_mux", False),
                 workers=params.get("workers"),
+                adaptive_workers=params.get("adaptive_workers", False),
+                download_processes=params.get("download_processes", 1),
                 downloads=params.get("downloads", 1),
                 worst=params.get("worst", False),
                 best_available=params.get("best_available", False),
diff --git a/unshackle/core/api/handlers.py b/unshackle/core/api/handlers.py
index 771c2bc6..9e2db1c2 100644
--- a/unshackle/core/api/handlers.py
+++ b/unshackle/core/api/handlers.py
@@ -70,6 +70,8 @@ DEFAULT_DOWNLOAD_PARAMS = {
     "no_source": False,
     "no_mux": False,
     "workers": None,
+    "adaptive_workers": False,
+    "download_processes": 1,
     "downloads": 1,
     "worst": False,
     "best_available": False,
@@ -984,6 +986,10 @@ def validate_download_parameters(data: Dict[str, Any]) -> Optional[str]:
         if not isinstance(data["workers"], int) or data["workers"] <= 0:
             return "workers must be a positive integer"
 
+    if "download_processes" in data and data["download_processes"] is not None:
+        if not isinstance(data["download_processes"], int) or data["download_processes"] <= 0:
+            return "download_processes must be a positive integer"
+
     if "downloads" in data and data["downloads"] is not None:
         if not isinstance(data["downloads"], int) or data["downloads"] <= 0:
             return "downloads must be a positive integer"
diff --git a/unshackle/core/api/routes.py b/unshackle/core/api/routes.py
index 9a841931..9a2606a3 100644
--- a/unshackle/core/api/routes.py
+++ b/unshackle/core/api/routes.py
@@ -781,6 +781,12 @@ async def download(request: web.Request) -> web.Response:
               workers:
                 type: integer
                 description: Max workers/threads per track download (default - None)
+              adaptive_workers:
+                type: boolean
+                description: Scale per-track segment workers to measured CDN throughput, up to the workers cap (default - false)
+              download_processes:
+                type: integer
+                description: Split a track's segments across this many processes; only engages for large batches (default - 1)
               downloads:
                 type: integer
                 description: Amount of tracks to download concurrently (default - 1)