diff --git a/src/flowrep/api/tools.py b/src/flowrep/api/tools.py
index 8268cd07..3844c52f 100644
--- a/src/flowrep/api/tools.py
+++ b/src/flowrep/api/tools.py
@@ -5,6 +5,8 @@
 for downstream library developers.
 """
 
+from flowrep.base_models import is_valid_label as is_valid_label
+from flowrep.base_models import validate_label as validate_label
 from flowrep.compiler.source import flowrep2python as flowrep2python
 from flowrep.converters.python_workflow_definition import (
     OutputContractError as OutputContractError,
@@ -15,6 +17,7 @@
 from flowrep.parsers.atomic_parser import atomic as atomic
 from flowrep.parsers.atomic_parser import parse_atomic as parse_atomic
 from flowrep.parsers.dataclass_parser import dataclass as dataclass
+from flowrep.parsers.label_helpers import unique_suffix as unique_suffix
 from flowrep.parsers.workflow_parser import parse_workflow as parse_workflow
 from flowrep.parsers.workflow_parser import workflow as workflow
 from flowrep.prospective.constant_recipe import is_jsonable as is_jsonable
diff --git a/src/flowrep/base_models.py b/src/flowrep/base_models.py
index 9003f494..8000bb5a 100644
--- a/src/flowrep/base_models.py
+++ b/src/flowrep/base_models.py
@@ -42,7 +42,7 @@ def is_valid_label(label: str) -> bool:
     )
 
 
-def _validate_label(v: str) -> str:
+def validate_label(v: str) -> str:
     if not isinstance(v, str) or not is_valid_label(v):
         raise ValueError(
             f"Label must be a valid Python identifier and not in "
@@ -51,7 +51,7 @@ def _validate_label(v: str) -> str:
     return v
 
 
-Label = Annotated[str, pydantic.BeforeValidator(_validate_label)]
+Label = Annotated[str, pydantic.BeforeValidator(validate_label)]
 
 
 T = TypeVar("T", bound=Hashable)