diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_project_chroots.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_project_chroots.py
index 0fe3f9ab1..b91037d16 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_project_chroots.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_project_chroots.py
@@ -4,12 +4,12 @@
 
 import flask
 from flask_restx import Namespace, Resource
-from coprs.views.misc import api_login_required
+from coprs.views.misc import api_login_required, get_from_payload
 from coprs.views.apiv3_ns import apiv3_ns, api, rename_fields_helper
-from coprs.views.apiv3_ns.schema import (
+from coprs.views.apiv3_ns.schema.schemas import (
     project_chroot_model,
     project_chroot_build_config_model,
-    project_chroot_parser,
+    project_chroot_get_input_model,
 )
 from coprs.logic.complex_logic import ComplexLogic, BuildConfigLogic
 from coprs.exceptions import ObjectNotFound, InvalidForm
@@ -75,35 +75,35 @@ def rename_fields(input_dict):
 
 @apiv3_project_chroots_ns.route("/")
 class ProjectChroot(Resource):
-    parser = project_chroot_parser()
-
-    @apiv3_project_chroots_ns.expect(parser)
+    @apiv3_project_chroots_ns.expect(project_chroot_get_input_model)
     @apiv3_project_chroots_ns.marshal_with(project_chroot_model)
     def get(self):
         """
         Get a project chroot
         Get settings for a single project chroot.
         """
-        args = self.parser.parse_args()
-        copr = get_copr(args.ownername, args.projectname)
-        chroot = ComplexLogic.get_copr_chroot_safe(copr, args.chrootname)
+        ownername, projectname, chrootname = get_from_payload(
+            apiv3_project_chroots_ns.payload, "ownername", "projectname", "chrootname"
+        )
+        copr = get_copr(ownername, projectname)
+        chroot = ComplexLogic.get_copr_chroot_safe(copr, chrootname)
         return to_dict(chroot)
 
 
 @apiv3_project_chroots_ns.route("/build-config")
 class BuildConfig(Resource):
-    parser = project_chroot_parser()
-
-    @apiv3_project_chroots_ns.expect(parser)
+    @apiv3_project_chroots_ns.expect(project_chroot_get_input_model)
     @apiv3_project_chroots_ns.marshal_with(project_chroot_build_config_model)
     def get(self):
         """
         Get a build config
         Generate a build config based on a project chroot settings.
         """
-        args = self.parser.parse_args()
-        copr = get_copr(args.ownername, args.projectname)
-        chroot = ComplexLogic.get_copr_chroot_safe(copr, args.chrootname)
+        ownername, projectname, chrootname = get_from_payload(
+            apiv3_project_chroots_ns.payload, "ownername", "projectname", "chrootname"
+        )
+        copr = get_copr(ownername, projectname)
+        chroot = ComplexLogic.get_copr_chroot_safe(copr, chrootname)
         if not chroot:
             raise ObjectNotFound('Chroot not found.')
         return to_build_config_dict(chroot)
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/docs.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/docs.py
index 4bf54c420..a4a660025 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/docs.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/docs.py
@@ -5,7 +5,7 @@
 def _generate_docs(field_names, extra_fields=None):
     result_dict = {}
     for field_name in field_names:
-        result_dict[field_name] = getattr(fields, field_names)
+        result_dict[field_name] = getattr(fields, field_name)
 
     if extra_fields is None:
         return result_dict
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/fields.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/fields.py
index 096a08a2f..607e8cbc8 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/fields.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/fields.py
@@ -1,7 +1,6 @@
 from flask_restx.fields import String, List, Integer, Boolean, Url, Raw
 
-# TODO: you can split these fields to some hierarchy e.g. using dataclasses but I
-#  don't see any hierarchy in it
+# TODO: split these fields to some hierarchy e.g. using dataclasses or to some clusters
 
 # TODO: Use some shared constants for description - a lot of it is basically copied
 #  description from forms
@@ -14,6 +13,12 @@
     example=123,
 )
 
+
+build_id = Integer(
+    description="ID of the build",
+    example=123456,
+)
+
 mock_chroot = String(
     description="Mock chroot",
     example="fedora-rawhide-x86_64",
@@ -24,7 +29,7 @@
     example="@copr",
 )
 
-fullname = String(
+full_name = String(
     description="Full name of the project",
     example="@copr/pull-requests",
 )
@@ -44,6 +49,8 @@
     example="copr-cli",
 )
 
+package_name = packagename
+
 comps_name = String(
     description="Name of the comps.xml file",
 )
@@ -128,7 +135,7 @@
 
 # TODO We are copy-pasting descriptions from web UI to this file. This field
 # is an ideal candidate for figuring out how to share the descriptions
-pypi_spec_generator = String(
+spec_generator = String(
     description=(
         "Tool for generating specfile from a PyPI package. "
         "The options are full-featured pyp2rpm with cross "
@@ -138,7 +145,7 @@
     example="pyp2spec",
 )
 
-pypi_spec_template = String(
+spec_template = String(
     description=(
         "Name of the spec template. "
         "This option is limited to pyp2rpm spec generator."
@@ -146,7 +153,7 @@
     example="default",
 )
 
-pypi_versions = List(
+python_versions = List(
     String,  # We currently return string but should this be number?
     description=(
         "For what python versions to build. "
@@ -239,22 +246,22 @@
     example="hello",
 )
 
-custom_script = String(
+script = String(
     description="Script code to produce a SRPM package",
     example="#! /bin/sh -x",
 )
 
-custom_builddeps = String(
+builddeps = String(
     description="URL to additional yum repos, which can be used during build.",
     example="copr://@copr/copr",
 )
 
-custom_resultdir = String(
+resultdir = String(
     description="Directory where SCRIPT generates sources",
     example="./_build",
 )
 
-custom_chroot = String(
+chroot = String(
     description="What chroot to run the script in",
     example="fedora-latest-x86_64",
 )
@@ -400,3 +407,15 @@
 multilib = Boolean
 
 verify = Boolean
+
+priority = Integer
+
+# TODO: specify those only in Repo schema?
+
+baseurl = Url
+
+url = String
+
+version = String
+
+webhook_rebuild = Boolean
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
index 663412e16..1b7f8c728 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
@@ -6,7 +6,6 @@
 #  somewhere - CLI, Frontend and backend shares these data with each other
 
 
-from abc import ABC
 from dataclasses import dataclass, fields, asdict, MISSING
 from typing import Any
 
@@ -18,7 +17,7 @@
 
 
 @dataclass
-class Schema(ABC):
+class Schema:
     @classmethod
     def schema_from_fields(cls) -> dict[str, Any]:
         result_schema = {}
@@ -41,7 +40,7 @@ def model(self):
         return api.model(self.__class__.__name__, self.to_dict())
 
 
-class InputSchema(ABC, Schema):
+class InputSchema(Schema):
     @property
     def get_required_attrs(self) -> list:
         """
@@ -100,7 +99,7 @@ def get_required_attrs(self) -> list:
 
 @dataclass
 class Repo(Schema):
-    baseurl: String
+    baseurl: Url
     module_hotfixes: Boolean
     priority: Integer
     id: String = String(example="copr_base")
@@ -309,6 +308,7 @@ class ProjectGet(InputSchema):
 build_model = _build_model
 package_builds_model = _package_builds_model
 project_model = Project.get_cls().model()
+package_model = Package.get_cls().model()
 
 
 # INPUT MODELS