diff --git a/mpt_api_client/http/client.py b/mpt_api_client/http/client.py
index 915298d8..ee8aa05e 100644
--- a/mpt_api_client/http/client.py
+++ b/mpt_api_client/http/client.py
@@ -49,7 +49,6 @@ def __init__(
         base_headers = {
             "User-Agent": "swo-marketplace-client/1.0",
             "Authorization": f"Bearer {api_token}",
-            "content-type": "application/json",
         }
         self.httpx_client = Client(
             base_url=base_url,
diff --git a/mpt_api_client/http/mixins.py b/mpt_api_client/http/mixins.py
index fb09a6be..375d32a7 100644
--- a/mpt_api_client/http/mixins.py
+++ b/mpt_api_client/http/mixins.py
@@ -86,7 +86,6 @@ def create(
                 _json_to_file_payload(resource_data),
                 "application/json",
             )
-
         response = self.http_client.request("post", self.path, files=files)  # type: ignore[attr-defined]
 
         return self._model_class.from_response(response)  # type: ignore[attr-defined, no-any-return]
diff --git a/mpt_api_client/models/model.py b/mpt_api_client/models/model.py
index c43da7a2..60b82e14 100644
--- a/mpt_api_client/models/model.py
+++ b/mpt_api_client/models/model.py
@@ -52,6 +52,11 @@ def from_response(cls, response: Response) -> Self:
         meta = Meta.from_response(response)
         return cls.new(response_data, meta)
 
+    @property
+    def id(self) -> str:
+        """Returns the resource ID."""
+        return str(self._resource_data.get("id", ""))  # type: ignore[no-untyped-call]
+
     def to_dict(self) -> dict[str, Any]:
         """Returns the resource as a dictionary."""
         return self._resource_data.to_dict()
diff --git a/mpt_api_client/resources/catalog/products.py b/mpt_api_client/resources/catalog/products.py
index f6ef8791..cece131f 100644
--- a/mpt_api_client/resources/catalog/products.py
+++ b/mpt_api_client/resources/catalog/products.py
@@ -1,10 +1,13 @@
+import json
+
 from mpt_api_client.http import AsyncService, Service
 from mpt_api_client.http.mixins import (
     AsyncCollectionMixin,
-    AsyncManagedResourceMixin,
+    AsyncModifiableResourceMixin,
     CollectionMixin,
-    ManagedResourceMixin,
+    ModifiableResourceMixin,
 )
+from mpt_api_client.http.types import FileTypes
 from mpt_api_client.models import Model, ResourceData
 from mpt_api_client.resources.catalog.mixins import (
     AsyncPublishableMixin,
@@ -54,13 +57,38 @@ class ProductsServiceConfig:
 
 class ProductsService(
     PublishableMixin[Product],
-    ManagedResourceMixin[Product],
+    ModifiableResourceMixin[Product],
     CollectionMixin[Product],
     Service[Product],
     ProductsServiceConfig,
 ):
     """Products service."""
 
+    def create(
+        self,
+        resource_data: ResourceData,
+        icon: FileTypes,
+    ) -> Product:
+        """Create product with icon.
+
+        Args:
+            resource_data: Product data.
+            icon: Icon image in jpg, png, GIF, etc.
+
+        Returns:
+            Created resource.
+        """
+        files: dict[str, FileTypes] = {}
+        files["product"] = (
+            None,
+            json.dumps(resource_data),
+            "application/json",
+        )
+        files["icon"] = icon
+        response = self.http_client.request("post", self.path, files=files)
+
+        return self._model_class.from_response(response)
+
     def item_groups(self, product_id: str) -> ItemGroupsService:
         """Return item_groups service."""
         return ItemGroupsService(
@@ -108,13 +136,37 @@ def update_settings(self, product_id: str, settings: ResourceData) -> Product:
 
 class AsyncProductsService(
     AsyncPublishableMixin[Product],
-    AsyncManagedResourceMixin[Product],
+    AsyncModifiableResourceMixin[Product],
     AsyncCollectionMixin[Product],
     AsyncService[Product],
     ProductsServiceConfig,
 ):
     """Products service."""
 
+    async def create(
+        self,
+        resource_data: ResourceData,
+        icon: FileTypes,
+    ) -> Product:
+        """Create product with icon.
+
+        Args:
+            resource_data: Product data.
+            icon: Icon image in jpg, png, GIF, etc.
+
+        Returns:
+            Created resource.
+        """
+        files: dict[str, FileTypes] = {}
+        files["product"] = (
+            None,
+            json.dumps(resource_data),
+            "application/json",
+        )
+        files["icon"] = icon
+        response = await self.http_client.request("post", self.path, files=files)
+        return self._model_class.from_response(response)
+
     def item_groups(self, product_id: str) -> AsyncItemGroupsService:
         """Return item_groups service."""
         return AsyncItemGroupsService(
diff --git a/tests/unit/http/test_client.py b/tests/unit/http/test_client.py
index 3970ea93..026b1844 100644
--- a/tests/unit/http/test_client.py
+++ b/tests/unit/http/test_client.py
@@ -19,7 +19,6 @@ def test_http_initialization(mocker):
         headers={
             "User-Agent": "swo-marketplace-client/1.0",
             "Authorization": "Bearer test-token",
-            "content-type": "application/json",
         },
         timeout=5.0,
         transport=mocker.ANY,
@@ -38,7 +37,6 @@ def test_env_initialization(monkeypatch, mocker):
         headers={
             "User-Agent": "swo-marketplace-client/1.0",
             "Authorization": f"Bearer {API_TOKEN}",
-            "content-type": "application/json",
         },
         timeout=5.0,
         transport=mocker.ANY,
diff --git a/tests/unit/http/test_mixins.py b/tests/unit/http/test_mixins.py
index f401d8c8..227525bb 100644
--- a/tests/unit/http/test_mixins.py
+++ b/tests/unit/http/test_mixins.py
@@ -154,6 +154,7 @@ async def test_async_file_create_with_data(async_media_service):
         b"Content-Type: image/jpeg\r\n\r\n"
         b"Image content\r\n" in request.content
     )
+    assert "multipart/form-data" in request.headers["Content-Type"]
     assert new_media.to_dict() == media_data
 
 
diff --git a/tests/unit/models/resource/test_resource.py b/tests/unit/models/resource/test_resource.py
index 4ab2ae38..1f504096 100644
--- a/tests/unit/models/resource/test_resource.py
+++ b/tests/unit/models/resource/test_resource.py
@@ -35,7 +35,7 @@ def test_attribute_getter(mocker, meta_data):
 
     resource = Model.from_response(response)
 
-    assert resource.id == 1
+    assert resource.id == "1"
     assert resource.name.given == "Albert"
 
 
@@ -43,10 +43,10 @@ def test_attribute_setter():
     resource_data = {"id": 1, "name": {"given": "Albert", "family": "Einstein"}}
     resource = Model(resource_data)
 
-    resource.id = 2
+    resource.id = "2"
     resource.name.given = "John"
 
-    assert resource.id == 2
+    assert resource.id == "2"
     assert resource.name.given == "John"
 
 
diff --git a/tests/unit/models/resource/test_resource_custom_key.py b/tests/unit/models/resource/test_resource_custom_key.py
index f43aea22..e8fc3e55 100644
--- a/tests/unit/models/resource/test_resource_custom_key.py
+++ b/tests/unit/models/resource/test_resource_custom_key.py
@@ -13,5 +13,5 @@ def test_custom_data_key():
 
     resource = ChargeResourceMock.from_response(response)
 
-    assert resource.id == 1
+    assert resource.id == "1"
     assert resource.amount == 100
diff --git a/tests/unit/resources/catalog/test_products.py b/tests/unit/resources/catalog/test_products.py
index 4c87a38a..f68d65e5 100644
--- a/tests/unit/resources/catalog/test_products.py
+++ b/tests/unit/resources/catalog/test_products.py
@@ -135,3 +135,47 @@ async def test_async_update_settings(async_products_service):
     assert request.method == "PUT"
     assert request.url.path == f"/public/v1/catalog/products/{product_id}/settings"
     assert product.to_dict() == expected_response
+
+
+def test_product_create(products_service, tmp_path):
+    """Test creating a product (sync)."""
+    product_data = {"name": "New Product", "category": "Books"}
+    expected_response = {"id": "PRD-123", "name": "New Product", "category": "Books"}
+
+    # Create a temporary icon file
+    icon_path = tmp_path / "icon.png"
+    icon_path.write_bytes(b"fake image data")
+    with icon_path.open("rb") as icon_file, respx.mock:
+        mock_route = respx.post("https://api.example.com/public/v1/catalog/products").mock(
+            return_value=httpx.Response(httpx.codes.CREATED, json=expected_response)
+        )
+
+        product = products_service.create(product_data, icon=icon_file)
+
+    assert mock_route.call_count == 1
+    request = mock_route.calls[0].request
+    assert request.method == "POST"
+    assert request.url.path == "/public/v1/catalog/products"
+    assert product.to_dict() == expected_response
+
+
+async def test_async_product_create(async_products_service, tmp_path):
+    """Test creating a product (async)."""
+    product_data = {"name": "Async Product", "category": "Music"}
+    expected_response = {"id": "PRD-456", "name": "Async Product", "category": "Music"}
+
+    # Create a temporary icon file
+    icon_path = tmp_path / "icon.png"
+    icon_path.write_bytes(b"fake image data")
+    with icon_path.open("rb") as icon_file, respx.mock:
+        mock_route = respx.post("https://api.example.com/public/v1/catalog/products").mock(
+            return_value=httpx.Response(httpx.codes.CREATED, json=expected_response)
+        )
+
+        product = await async_products_service.create(product_data, icon=icon_file)
+
+    assert mock_route.call_count == 1
+    request = mock_route.calls[0].request
+    assert request.method == "POST"
+    assert request.url.path == "/public/v1/catalog/products"
+    assert product.to_dict() == expected_response