diff --git a/src/mcp_server_qdrant/mcp_server.py b/src/mcp_server_qdrant/mcp_server.py
index 58a7cc0..7d08beb 100644
--- a/src/mcp_server_qdrant/mcp_server.py
+++ b/src/mcp_server_qdrant/mcp_server.py
@@ -98,6 +98,13 @@ class QdrantMCPServer(FastMCP):
             collection_name: Annotated[
                 str, Field(description="The collection to store the information in")
             ],
+            project: Annotated[
+                str,
+                Field(
+                    description="Project name, e.g. devops, stereo-hysteria, voice-assistant. "
+                    "Use 'global' for cross-project knowledge (servers, network, user preferences)."
+                ),
+            ] = "global",
             # The `metadata` parameter is defined as non-optional, but it can be None.
             # If we set it to be optional, some of the MCP clients, like Cursor, cannot
             # handle the optional parameter correctly.
@@ -112,12 +119,17 @@ class QdrantMCPServer(FastMCP):
             Store some information in Qdrant.
             :param ctx: The context for the request.
             :param information: The information to store.
+            :param project: The project name to tag this memory with.
             :param metadata: JSON metadata to store with the information, optional.
             :param collection_name: The name of the collection to store the information in, optional. If not provided,
                                     the default collection is used.
             :return: A message indicating that the information was stored.
             """
-            await ctx.debug(f"Storing information {information} in Qdrant")
+            await ctx.debug(f"Storing information {information} in Qdrant (project={project})")
+
+            if metadata is None:
+                metadata = {}
+            metadata["project"] = project
 
             entry = Entry(content=information, metadata=metadata)
 
diff --git a/src/mcp_server_qdrant/qdrant.py b/src/mcp_server_qdrant/qdrant.py
index 0030cac..5d64061 100644
--- a/src/mcp_server_qdrant/qdrant.py
+++ b/src/mcp_server_qdrant/qdrant.py
@@ -211,8 +211,14 @@ class QdrantConnector:
                 sparse_vectors_config=sparse_config,
             )
 
-            # Create payload indexes if configured
+            # Always index metadata.project for efficient filtering
+            await self._client.create_payload_index(
+                collection_name=collection_name,
+                field_name="metadata.project",
+                field_schema=models.PayloadSchemaType.KEYWORD,
+            )
 
+            # Create payload indexes if configured
             if self._field_indexes:
                 for field_name, field_type in self._field_indexes.items():
                     await self._client.create_payload_index(