diff --git a/pkgs/development/python-modules/openapi-schema-validator/default.nix b/pkgs/development/python-modules/openapi-schema-validator/default.nix
new file mode 100644
index 00000000000..f09a42ddd69
--- /dev/null
+++ b/pkgs/development/python-modules/openapi-schema-validator/default.nix
@@ -0,0 +1,34 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytestCheckHook
+, isodate
+, jsonschema
+, pytest-flake8
+, pytestcov
+, rfc3339-validator
+, six
+, strict-rfc3339
+}:
+
+buildPythonPackage rec {
+  pname = "openapi-schema-validator";
+  version = "0.1.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "a4b2712020284cee880b4c55faa513fbc2f8f07f365deda6098f8ab943c9f0df";
+  };
+
+  propagatedBuildInputs = [ isodate jsonschema six strict-rfc3339 rfc3339-validator ];
+
+  checkInputs = [ pytestCheckHook pytestcov pytest-flake8 ];
+  pythonImportsCheck = [ "openapi_schema_validator" ];
+
+  meta = with lib; {
+    description = "Validates OpenAPI schema against the OpenAPI Schema Specification v3.0";
+    homepage = "https://github.com/p1c2u/openapi-schema-validator";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ AluisioASG ];
+  };
+}
diff --git a/pkgs/development/python-modules/openapi-spec-validator/default.nix b/pkgs/development/python-modules/openapi-spec-validator/default.nix
index 1cd95bcd6ab..88455e72610 100644
--- a/pkgs/development/python-modules/openapi-spec-validator/default.nix
+++ b/pkgs/development/python-modules/openapi-spec-validator/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, isPy27, fetchPypi
-, jsonschema, pyyaml, six, pathlib
+, jsonschema, openapi-schema-validator, pyyaml, six, pathlib
 , mock, pytest, pytestcov, pytest-flake8, tox, setuptools }:
 
 buildPythonPackage rec {
@@ -11,7 +11,7 @@ buildPythonPackage rec {
     sha256 = "53ba3d884e98ff2062d5ada025aa590541dcd665b8f81067dc82dd61c0923759";
   };
 
-  propagatedBuildInputs = [ jsonschema pyyaml six setuptools ]
+  propagatedBuildInputs = [ jsonschema openapi-schema-validator pyyaml six setuptools ]
     ++ (lib.optionals (isPy27) [ pathlib ]);
 
   checkInputs = [ mock pytest pytestcov pytest-flake8 tox ];
diff --git a/pkgs/development/python-modules/rfc3339-validator/default.nix b/pkgs/development/python-modules/rfc3339-validator/default.nix
new file mode 100644
index 00000000000..f51a232550b
--- /dev/null
+++ b/pkgs/development/python-modules/rfc3339-validator/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytestCheckHook
+, hypothesis
+, six
+, strict-rfc3339
+}:
+
+buildPythonPackage rec {
+  pname = "rfc3339-validator";
+  version = "0.1.3";
+
+  src = fetchPypi {
+    pname = "rfc3339_validator";
+    inherit version;
+    sha256 = "7a578aa0740e9ee2b48356fe1f347139190c4c72e27f303b3617054efd15df32";
+  };
+
+  propagatedBuildInputs = [ six ];
+
+  checkInputs = [ pytestCheckHook hypothesis strict-rfc3339 ];
+  pythonImportsCheck = [ "rfc3339_validator" ];
+
+  meta = with lib; {
+    description = "RFC 3339 validator for Python";
+    homepage = "https://github.com/naimetti/rfc3339-validator";
+    license = licenses.mit;
+    maintainers = with maintainers; [ AluisioASG ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 032d6972654..694bafa127a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4598,6 +4598,8 @@ in {
 
   openant = callPackage ../development/python-modules/openant { };
 
+  openapi-schema-validator = callPackage ../development/python-modules/openapi-schema-validator { };
+
   openapi-spec-validator = callPackage ../development/python-modules/openapi-spec-validator { };
 
   openbabel-bindings = callPackage ../development/python-modules/openbabel-bindings {
@@ -7024,6 +7026,8 @@ in {
 
   retworkx = callPackage ../development/python-modules/retworkx { };
 
+  rfc3339-validator = callPackage ../development/python-modules/rfc3339-validator { };
+
   rfc3986 = callPackage ../development/python-modules/rfc3986 { };
 
   rfc3987 = callPackage ../development/python-modules/rfc3987 { };