diff --git a/dsp_permissions_scripts/ap/ap_get.py b/dsp_permissions_scripts/ap/ap_get.py
index 80e9e19f..60cabb7d 100644
--- a/dsp_permissions_scripts/ap/ap_get.py
+++ b/dsp_permissions_scripts/ap/ap_get.py
@@ -5,7 +5,9 @@
 from dsp_permissions_scripts.models.errors import ApiError
 from dsp_permissions_scripts.utils.dsp_client import DspClient
 from dsp_permissions_scripts.utils.get_logger import get_logger
-from dsp_permissions_scripts.utils.project import get_project_iri_by_shortcode
+from dsp_permissions_scripts.utils.project import (
+    get_project_iri_and_onto_iris_by_shortcode,
+)
 
 logger = get_logger(__name__)
 
@@ -50,7 +52,7 @@ def _get_all_aps_of_project(project_iri: str, dsp_client: DspClient) -> list[Ap]
 def get_aps_of_project(shortcode: str, dsp_client: DspClient) -> list[Ap]:
     """Returns the Administrative Permissions for a project."""
     logger.info("****** Retrieving all Administrative Permissions... ******")
-    project_iri = get_project_iri_by_shortcode(shortcode, dsp_client)
+    project_iri, _ = get_project_iri_and_onto_iris_by_shortcode(shortcode, dsp_client)
     aps = _get_all_aps_of_project(project_iri, dsp_client)
     logger.info(f"Retrieved {len(aps)} Administrative Permissions")
     return aps
diff --git a/dsp_permissions_scripts/doap/doap_get.py b/dsp_permissions_scripts/doap/doap_get.py
index 54f946d6..76949354 100644
--- a/dsp_permissions_scripts/doap/doap_get.py
+++ b/dsp_permissions_scripts/doap/doap_get.py
@@ -5,7 +5,9 @@
 from dsp_permissions_scripts.models.errors import ApiError
 from dsp_permissions_scripts.utils.dsp_client import DspClient
 from dsp_permissions_scripts.utils.get_logger import get_logger
-from dsp_permissions_scripts.utils.project import get_project_iri_by_shortcode
+from dsp_permissions_scripts.utils.project import (
+    get_project_iri_and_onto_iris_by_shortcode,
+)
 from dsp_permissions_scripts.utils.scope_serialization import (
     create_scope_from_admin_route_object,
 )
@@ -72,7 +74,7 @@ def get_doaps_of_project(
     By default, all DOAPs are returned, regardless of their target (target=all).
     """
     logger.info("****** Retrieving all DOAPs... ******")
-    project_iri = get_project_iri_by_shortcode(shortcode, dsp_client)
+    project_iri, _ = get_project_iri_and_onto_iris_by_shortcode(shortcode, dsp_client)
     doaps = _get_all_doaps_of_project(project_iri, dsp_client)
     filtered_doaps = _filter_doaps_by_target(
         doaps=doaps,
diff --git a/dsp_permissions_scripts/oap/oap_get.py b/dsp_permissions_scripts/oap/oap_get.py
index bb5820f6..3523d4f6 100644
--- a/dsp_permissions_scripts/oap/oap_get.py
+++ b/dsp_permissions_scripts/oap/oap_get.py
@@ -7,7 +7,7 @@
 from dsp_permissions_scripts.utils.get_logger import get_logger
 from dsp_permissions_scripts.utils.project import (
     get_all_resource_class_iris_of_project,
-    get_project_iri_by_shortcode,
+    get_project_iri_and_onto_iris_by_shortcode,
 )
 from dsp_permissions_scripts.utils.scope_serialization import create_scope_from_string
 
@@ -99,9 +99,9 @@ def get_all_resource_oaps_of_project(
     excluded_class_iris: Iterable[str] = (),
 ) -> list[Oap]:
     logger.info("******* Retrieving all resource OAPs... *******")
-    project_iri = get_project_iri_by_shortcode(shortcode, dsp_client)
+    project_iri, onto_iris = get_project_iri_and_onto_iris_by_shortcode(shortcode, dsp_client)
     all_resource_oaps = []
-    resclass_iris = get_all_resource_class_iris_of_project(project_iri, dsp_client)
+    resclass_iris = get_all_resource_class_iris_of_project(onto_iris, dsp_client)
     resclass_iris = [x for x in resclass_iris if x not in excluded_class_iris]
     for resclass_iri in resclass_iris:
         resource_oaps = _get_all_resource_oaps_of_resclass(resclass_iri, project_iri, dsp_client)
diff --git a/dsp_permissions_scripts/utils/dsp_client.py b/dsp_permissions_scripts/utils/dsp_client.py
index 442d0586..8619787a 100644
--- a/dsp_permissions_scripts/utils/dsp_client.py
+++ b/dsp_permissions_scripts/utils/dsp_client.py
@@ -2,7 +2,6 @@
 import re
 import time
 from dataclasses import dataclass, field
-from datetime import datetime
 from functools import partial
 from importlib.metadata import version
 from typing import Any, Literal, Optional, cast
diff --git a/dsp_permissions_scripts/utils/project.py b/dsp_permissions_scripts/utils/project.py
index dca3eccb..8c53e68c 100644
--- a/dsp_permissions_scripts/utils/project.py
+++ b/dsp_permissions_scripts/utils/project.py
@@ -8,17 +8,6 @@
 logger = get_logger(__name__)
 
 
-def _get_onto_iris_of_project(project_iri: str, dsp_client: DspClient) -> list[str]:
-    try:
-        response = dsp_client.get("/v2/ontologies/metadata")
-    except ApiError as err:
-        err.message = f"Could not get onto IRIs of project {project_iri}"
-        raise err from None
-    all_ontologies = response["@graph"]
-    project_onto_iris = [o["@id"] for o in all_ontologies if o["knora-api:attachedToProject"]["@id"] == project_iri]
-    return project_onto_iris
-
-
 def _get_class_iris_of_onto(onto_iri: str, dsp_client: DspClient) -> list[str]:
     try:
         response = dsp_client.get(f"/v2/ontologies/allentities/{quote_plus(onto_iri)}")
@@ -32,21 +21,21 @@ def _get_class_iris_of_onto(onto_iri: str, dsp_client: DspClient) -> list[str]:
     return class_iris
 
 
-def get_all_resource_class_iris_of_project(project_iri: str, dsp_client: DspClient) -> list[str]:
-    project_onto_iris = _get_onto_iris_of_project(project_iri, dsp_client)
+def get_all_resource_class_iris_of_project(onto_iris: list[str], dsp_client: DspClient) -> list[str]:
     all_class_iris = []
-    for onto_iri in project_onto_iris:
+    for onto_iri in onto_iris:
         class_iris = _get_class_iris_of_onto(onto_iri, dsp_client)
         all_class_iris.extend(class_iris)
         logger.info(f"Found {len(class_iris)} resource classes in onto {onto_iri}.")
     return all_class_iris
 
 
-def get_project_iri_by_shortcode(shortcode: str, dsp_client: DspClient) -> str:
+def get_project_iri_and_onto_iris_by_shortcode(shortcode: str, dsp_client: DspClient) -> tuple[str, list[str]]:
     try:
         response = dsp_client.get(f"/admin/projects/shortcode/{shortcode}")
     except ApiError as err:
         err.message = f"Could not get project IRI by shortcode {shortcode}"
         raise err from None
-    iri: str = response["project"]["id"]
-    return iri
+    project_iri: str = response["project"]["id"]
+    onto_iris: list[str] = response["project"]["ontologies"]
+    return project_iri, onto_iris