diff --git a/api/src/database/collection.py b/api/src/database/collection.py
index f645396..e3e24aa 100644
--- a/api/src/database/collection.py
+++ b/api/src/database/collection.py
@@ -1,6 +1,7 @@
 from src.database.document import Document
 from src.database.models.user_models import UserModel
 from src.database.models.project_models import ProjectModel
+from src.database.models.case_models import CaseModel
 
 
 def project_document() -> Document:
@@ -8,6 +9,11 @@ def project_document() -> Document:
     return Document(collection="projects", model=ProjectModel, unique_field="name")
 
 
+def case_document() -> Document:
+    """Get case document."""
+    return Document(collection="cases", model=CaseModel, unique_field="name")
+
+
 def user_document() -> Document:
     """Get user document."""
     return Document(collection="users", model=UserModel, unique_field="email")
diff --git a/api/src/database/models/case_models.py b/api/src/database/models/case_models.py
new file mode 100644
index 0000000..5d3d001
--- /dev/null
+++ b/api/src/database/models/case_models.py
@@ -0,0 +1,10 @@
+from typing import Any
+from src.database.models import BaseDBModel
+
+
+class CaseModel(BaseDBModel):
+    """Case Model."""
+
+    name: str
+    project_id: str
+    diagram_data: dict[Any, Any]
diff --git a/api/src/routes/payload_models/case_ models.py b/api/src/routes/payload_models/case_ models.py
new file mode 100644
index 0000000..fecb3b0
--- /dev/null
+++ b/api/src/routes/payload_models/case_ models.py	
@@ -0,0 +1,7 @@
+from pydantic import BaseModel
+
+
+class CaseModel(BaseModel):
+    """Case model."""
+
+    name: str