diff --git a/offsets_db_api/geo.py b/offsets_db_api/geo.py
index d2ea101..49b3dc9 100644
--- a/offsets_db_api/geo.py
+++ b/offsets_db_api/geo.py
@@ -89,6 +89,19 @@ def get_bboxes_for_projects(project_ids: list[str]) -> dict[str, dict[str, float
     return {pid: bbox_lookup[pid] for pid in project_ids if pid in bbox_lookup}
 
 
+def get_projects_with_geometry() -> set[str]:
+    """
+    Get the set of project IDs that have geographic boundaries.
+
+    Returns
+    -------
+    set
+        Set of project IDs that have boundaries
+    """
+    bbox_lookup = load_project_bboxes()
+    return set(bbox_lookup.keys())
+
+
 def clear_bbox_cache():
     """Clear the cached bbox data to force a reload."""
     load_project_bboxes.cache_clear()
diff --git a/offsets_db_api/routers/credits.py b/offsets_db_api/routers/credits.py
index aec8329..2605dbf 100644
--- a/offsets_db_api/routers/credits.py
+++ b/offsets_db_api/routers/credits.py
@@ -5,6 +5,7 @@
 from offsets_db_api.cache import CACHE_NAMESPACE
 from offsets_db_api.common import build_filters
 from offsets_db_api.database import get_session
+from offsets_db_api.geo import get_projects_with_geometry
 from offsets_db_api.log import get_logger
 from offsets_db_api.models import Credit, PaginatedCredits, Project
 from offsets_db_api.schemas import (
@@ -36,6 +37,10 @@ async def get_credits(
     project_filters: ProjectFilters = Depends(get_project_filters),
     credit_filters: CreditFilters = Depends(get_credit_filters),
     beneficiary_filters: BeneficiaryFilters = Depends(get_beneficiary_filters),
+    geography: bool | None = Query(
+        None,
+        description='Filter by geographic boundaries. True = only credits from projects with boundaries, False = only credits from projects without boundaries, None = no filter.',
+    ),
     sort: list[str] = Query(
         default=['project_id'],
         description='List of sorting parameters in the format `field_name` or `+field_name` for ascending order or `-field_name` for descending order.',
@@ -59,6 +64,16 @@ async def get_credits(
     if project_id:
         filters.insert(0, ('project_id', project_id, '==', Project))
 
+    # Filter by geographic boundaries
+    if geography is not None:
+        projects_with_geo = get_projects_with_geometry()
+        if geography:
+            # Only credits from projects WITH boundaries
+            statement = statement.where(col(Project.project_id).in_(projects_with_geo))
+        else:
+            # Only credits from projects WITHOUT boundaries
+            statement = statement.where(~col(Project.project_id).in_(projects_with_geo))
+
     for attribute, values, operation, model in filters:
         statement = apply_filters(
             statement=statement,
diff --git a/offsets_db_api/routers/projects.py b/offsets_db_api/routers/projects.py
index 287c718..cf90284 100644
--- a/offsets_db_api/routers/projects.py
+++ b/offsets_db_api/routers/projects.py
@@ -9,7 +9,11 @@
 from offsets_db_api.cache import CACHE_NAMESPACE
 from offsets_db_api.common import build_filters
 from offsets_db_api.database import get_session
-from offsets_db_api.geo import get_bbox_for_project, get_bboxes_for_projects
+from offsets_db_api.geo import (
+    get_bbox_for_project,
+    get_bboxes_for_projects,
+    get_projects_with_geometry,
+)
 from offsets_db_api.log import get_logger
 from offsets_db_api.models import (
     Clip,
@@ -65,6 +69,10 @@ async def get_projects(
         description='Case insensitive search string. Currently searches on `project_id` and `name` fields only.',
     ),
     beneficiary_filters: BeneficiaryFilters = Depends(get_beneficiary_filters),
+    geography: bool | None = Query(
+        None,
+        description='Filter by geographic boundaries. True = only projects with boundaries, False = only projects without boundaries, None = no filter.',
+    ),
     current_page: int = Query(1, description='Page number', ge=1),
     per_page: int = Query(100, description='Items per page', le=200, ge=1),
     sort: list[str] = Query(
@@ -84,6 +92,20 @@ async def get_projects(
 
     filters = build_filters(project_filters=project_filters)
 
+    # Filter by geographic boundaries
+    if geography is not None:
+        projects_with_geo = get_projects_with_geometry()
+        if geography:
+            # Only projects WITH boundaries
+            matching_projects = matching_projects.where(
+                col(Project.project_id).in_(projects_with_geo)
+            )
+        else:
+            # Only projects WITHOUT boundaries
+            matching_projects = matching_projects.where(
+                ~col(Project.project_id).in_(projects_with_geo)
+            )
+
     if search:
         search_pattern = f'%{search}%'
         matching_projects = matching_projects.where(