diff --git a/src/rst_package_refs/registry/npm.py b/src/rst_package_refs/registry/npm.py
index d156051..fd73737 100644
--- a/src/rst_package_refs/registry/npm.py
+++ b/src/rst_package_refs/registry/npm.py
@@ -1,26 +1,16 @@
 """NPM registry refecence module."""
-from typing import List, Optional
-
-from docutils import nodes
 from docutils.parsers.rst import roles
-from docutils.parsers.rst.states import Inliner
 
+from .. import toolkit
+
+
+class Package(toolkit.Package):
+    """Python package published on PyPI."""
 
-def reference_role(
-    role: str,
-    rawtext: str,
-    text: str,
-    lineno: int,
-    inliner: Inliner,
-    options: Optional[dict] = None,
-    content: Optional[List[str]] = None,
-):
-    """Parser."""
-    options = roles.normalized_role_options(options)
-    messages = []
-    url = f"https://www.npmjs.com/package/{text}"
-    return [nodes.reference(rawtext, text, refuri=url, **options)], messages
+    @property
+    def url(self):  # noqa: D102
+        return f"https://www.npmjs.com/package/{self.name}"
 
 
 def setup():  # noqa: D103
-    roles.register_canonical_role("npm", reference_role)
+    roles.register_canonical_role("npm", toolkit.create_reference_role(Package))
diff --git a/src/rst_package_refs/registry/pypi.py b/src/rst_package_refs/registry/pypi.py
index 927d25c..8df2ca7 100644
--- a/src/rst_package_refs/registry/pypi.py
+++ b/src/rst_package_refs/registry/pypi.py
@@ -1,26 +1,16 @@
 """PyPI registry refecence module."""
-from typing import List, Optional
-
-from docutils import nodes
 from docutils.parsers.rst import roles
-from docutils.parsers.rst.states import Inliner
 
+from .. import toolkit
+
+
+class Package(toolkit.Package):
+    """Python package published on PyPI."""
 
-def reference_role(
-    role: str,
-    rawtext: str,
-    text: str,
-    lineno: int,
-    inliner: Inliner,
-    options: Optional[dict] = None,
-    content: Optional[List[str]] = None,
-):
-    """Parser."""
-    options = roles.normalized_role_options(options)
-    messages = []
-    url = f"https://pypi.org/project/{text}"
-    return [nodes.reference(rawtext, text, refuri=url, **options)], messages
+    @property
+    def url(self):  # noqa: D102
+        return f"https://pypi.org/project/{self.name}"
 
 
 def setup():  # noqa: D103
-    roles.register_canonical_role("pypi", reference_role)
+    roles.register_canonical_role("pypi", toolkit.create_reference_role(Package))
diff --git a/src/rst_package_refs/toolkit.py b/src/rst_package_refs/toolkit.py
index 726f2be..d1e2b23 100644
--- a/src/rst_package_refs/toolkit.py
+++ b/src/rst_package_refs/toolkit.py
@@ -2,7 +2,11 @@
 import abc
 import re
 from dataclasses import dataclass
-from typing import Tuple
+from typing import List, Optional, Tuple, Type
+
+from docutils import nodes
+from docutils.parsers.rst import roles
+from docutils.parsers.rst.states import Inliner
 
 
 @dataclass
@@ -26,6 +30,26 @@ def parse(cls, target) -> "Package":
         return cls(name=target)
 
 
+def create_reference_role(package_class: Type[Package]) -> callable:
+    """Create custom-role function for assigned package type."""
+
+    def _reference_role(
+        role: str,
+        rawtext: str,
+        text: str,
+        lineno: int,
+        inliner: Inliner,
+        options: Optional[dict] = None,
+        content: Optional[List[str]] = None,
+    ):
+        options = roles.normalized_role_options(options)
+        messages = []
+        package = package_class.parse(text)
+        return [nodes.reference(rawtext, text, refuri=package.url, **options)], messages
+
+    return _reference_role
+
+
 def split_text(source: str) -> Tuple[str, str]:
     """Split from content to displaying text and target text.