diff --git a/src/mozilla_taskgraph/worker_types.py b/src/mozilla_taskgraph/worker_types.py
index bcfb5da..a030a7c 100644
--- a/src/mozilla_taskgraph/worker_types.py
+++ b/src/mozilla_taskgraph/worker_types.py
@@ -70,6 +70,11 @@
                     "tag", description="The tag of the commit running the build."
                 ): str,
             },
+            Optional(
+                "artifact_prefix",
+                description="Directory prefix to store artifacts. Set this to 'public' "
+                "to create public artifacts.",
+            ): str,
         },
         Extra: object,
     },
@@ -129,7 +134,9 @@ def normref(ref, type="heads"):
                 "branch_dest_repo_owner", config.params["base_repository"]
             )
 
-    task_def["payload"] = {"build_params": build_params}
+    payload = task_def["payload"] = {"build_params": build_params}
+    if bitrise.get("artifact_prefix"):
+        payload["artifact_prefix"] = bitrise["artifact_prefix"]
 
 
 @payload_builder(
diff --git a/test/test_worker_types.py b/test/test_worker_types.py
index cbaaba4..3d74ab0 100644
--- a/test/test_worker_types.py
+++ b/test/test_worker_types.py
@@ -160,6 +160,32 @@
             },
             id="environments",
         ),
+        pytest.param(
+            {
+                "bitrise": {
+                    "artifact_prefix": "public",
+                    "app": "some-app",
+                    "workflows": ["bar"],
+                }
+            },
+            {},
+            {
+                "payload": {
+                    "artifact_prefix": "public",
+                    "build_params": {
+                        "branch": "default",
+                        "branch_repo_owner": "http://example.com/head/repo",
+                        "commit_hash": "abcdef",
+                    },
+                },
+                "scopes": [
+                    "foo:bitrise:app:some-app",
+                    "foo:bitrise:workflow:bar",
+                ],
+                "tags": {"worker-implementation": "scriptworker"},
+            },
+            id="artifact prefix",
+        ),
     ),
 )
 def test_build_bitrise_payload(