diff --git a/workers/aragorn_lookup/worker.py b/workers/aragorn_lookup/worker.py
index 4b1492b..56e7c38 100644
--- a/workers/aragorn_lookup/worker.py
+++ b/workers/aragorn_lookup/worker.py
@@ -120,6 +120,14 @@ async def aragorn_lookup(task, logger: logging.Logger):
     parameters["tiers"] = parameters.get("tiers") or [settings.default_data_tier]
     use_gandalf = parameters.get("gandalf", False)
     message["parameters"] = parameters
+    if "submitter" not in message:
+        message["submitter"] = (
+            "infores:shepherd-aragorn:{maturity}@{location}@{url}".format(
+                maturity=settings.server_maturity,
+                location=settings.server_location,
+                url=settings.server_url,
+            )
+        )
     try:
         infer, question_qnode, answer_qnode, pathfinder = examine_query(message)
     except Exception as e:
@@ -166,6 +174,7 @@ async def aragorn_lookup(task, logger: logging.Logger):
         if use_gandalf:
             for expanded_message in expanded_messages:
                 callback_id = str(uuid.uuid4())[:8]
+
                 # Put callback UID and query ID in postgres
                 await add_callback_id(query_id, callback_id, logger)
                 logger.debug("""Sending lookup query to gandalf.""")
@@ -345,6 +354,7 @@ def expand_aragorn_query(input_message, logger: logging.Logger):
         {
             "message": {"query_graph": qg},
             "parameters": input_message["parameters"],
+            "submitter": input_message["submitter"],
         }
     ]
     # If we don't have any AMIE expansions, this will just generate the direct query
@@ -371,6 +381,7 @@ def expand_aragorn_query(input_message, logger: logging.Logger):
         if "log_level" in input_message:
             message["log_level"] = input_message["log_level"]
         message["parameters"] = input_message["parameters"]
+        message["submitter"] = input_message["submitter"]
         messages.append(message)
     return messages
 
diff --git a/workers/aragorn_pathfinder/worker.py b/workers/aragorn_pathfinder/worker.py
index 361a5b7..9afe88c 100644
--- a/workers/aragorn_pathfinder/worker.py
+++ b/workers/aragorn_pathfinder/worker.py
@@ -119,7 +119,7 @@ async def shadowfax(task, logger: logging.Logger):
                             "biolink:translates_to",
                             "biolink:translation_of",
                             "biolink:has_gene_product",
-                            "biolink:gene_product_of"
+                            "biolink:gene_product_of",
                         ],
                     },
                     "e1": {
@@ -146,7 +146,7 @@ async def shadowfax(task, logger: logging.Logger):
                             "biolink:translates_to",
                             "biolink:translation_of",
                             "biolink:has_gene_product",
-                            "biolink:gene_product_of"
+                            "biolink:gene_product_of",
                         ],
                     },
                     "e2": {
@@ -173,7 +173,7 @@ async def shadowfax(task, logger: logging.Logger):
                             "biolink:translates_to",
                             "biolink:translation_of",
                             "biolink:has_gene_product",
-                            "biolink:gene_product_of"
+                            "biolink:gene_product_of",
                         ],
                     },
                 },
diff --git a/workers/arax/inject_shepherd_arax_provenance.py b/workers/arax/inject_shepherd_arax_provenance.py
index 62e5077..9a2a3ed 100644
--- a/workers/arax/inject_shepherd_arax_provenance.py
+++ b/workers/arax/inject_shepherd_arax_provenance.py
@@ -2,7 +2,6 @@
 
 from typing import Any, Dict
 
-
 SHEPHERD_ARAX_SOURCE = {
     "resource_id": "infores:shepherd-arax",
     "resource_role": "aggregator_knowledge_source",
diff --git a/workers/bte_lookup/worker.py b/workers/bte_lookup/worker.py
index 84cabf0..7cceab6 100644
--- a/workers/bte_lookup/worker.py
+++ b/workers/bte_lookup/worker.py
@@ -118,6 +118,14 @@ async def bte_lookup(task, logger: logging.Logger):
     parameters["timeout"] = parameters.get("timeout", settings.lookup_timeout)
     parameters["tiers"] = parameters.get("tiers") or [settings.default_data_tier]
     message["parameters"] = parameters
+    if "submitter" not in message:
+        message["submitter"] = (
+            "infores:shepherd-bte:{maturity}@{location}@{url}".format(
+                maturity=settings.server_maturity,
+                location=settings.server_location,
+                url=settings.server_url,
+            )
+        )
     try:
         infer, question_qnode, answer_qnode, pathfinder = examine_query(message)
     except Exception as e:
@@ -354,6 +362,7 @@ def fill_templates(
             del message["message"]["knowledge_graph"]
         message["parameters"] = query_body["parameters"]
         message["workflow"] = [{"id": "lookup"}]
+        message["submitter"] = query_body["submitter"]
         filled_templates.append(message)
 
     return filled_templates
@@ -404,6 +413,7 @@ def expand_bte_query(query_dict: dict[str, Any], logger: logging.Logger) -> list
         {
             "message": {"query_graph": query_graph},
             "parameters": query_dict["parameters"],
+            "submitter": query_dict["submitter"],
         }
     ]
     expanded_queries.extend(filled_templates)
diff --git a/workers/merge_message/worker.py b/workers/merge_message/worker.py
index d4e63ff..9c551b1 100644
--- a/workers/merge_message/worker.py
+++ b/workers/merge_message/worker.py
@@ -327,7 +327,9 @@ def filter_repeated_nodes(response, logger: logging.Logger):
     original_result_count = len(response["message"].get("results", []))
     if original_result_count == 0:
         return
-    results = list(filter(lambda x: has_unique_nodes(x), response["message"]["results"]))
+    results = list(
+        filter(lambda x: has_unique_nodes(x), response["message"]["results"])
+    )
     response["message"]["results"] = results
     if len(results) != original_result_count:
         filter_kgraph_orphans(response, logger)