diff --git a/stapi-fastapi/src/stapi_fastapi/conformance.py b/stapi-fastapi/src/stapi_fastapi/conformance.py
index 836c34e..a593717 100644
--- a/stapi-fastapi/src/stapi_fastapi/conformance.py
+++ b/stapi-fastapi/src/stapi_fastapi/conformance.py
@@ -1,3 +1,5 @@
-CORE = "https://stapi.example.com/v0.1.0/core"
-OPPORTUNITIES = "https://stapi.example.com/v0.1.0/opportunities"
-ASYNC_OPPORTUNITIES = "https://stapi.example.com/v0.1.0/async-opportunities"
+from stapi_pydantic.constants import STAPI_VERSION
+
+CORE = f"https://stapi.example.com/v{STAPI_VERSION}/core"
+OPPORTUNITIES = f"https://stapi.example.com/v{STAPI_VERSION}/opportunities"
+ASYNC_OPPORTUNITIES = f"https://stapi.example.com/v{STAPI_VERSION}/async-opportunities"
diff --git a/stapi-pydantic/CHANGELOG.md b/stapi-pydantic/CHANGELOG.md
index 78bddee..c26048e 100644
--- a/stapi-pydantic/CHANGELOG.md
+++ b/stapi-pydantic/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ## [Unreleased]
 
+### Added
+
+- `stapi_type` and `stapi_version` ([#54](https://github.com/stapi-spec/pystapi/pull/54))
+
 ## [0.0.2] - 2025-04-02
 
 ### Changed
diff --git a/stapi-pydantic/src/stapi_pydantic/constants.py b/stapi-pydantic/src/stapi_pydantic/constants.py
new file mode 100644
index 0000000..80915d1
--- /dev/null
+++ b/stapi-pydantic/src/stapi_pydantic/constants.py
@@ -0,0 +1,2 @@
+STAPI_VERSION = "0.1.0"
+"""The default STAPI version for this library."""
diff --git a/stapi-pydantic/src/stapi_pydantic/order.py b/stapi-pydantic/src/stapi_pydantic/order.py
index 9ed02c8..8d23594 100644
--- a/stapi-pydantic/src/stapi_pydantic/order.py
+++ b/stapi-pydantic/src/stapi_pydantic/order.py
@@ -13,6 +13,7 @@
     field_validator,
 )
 
+from .constants import STAPI_VERSION
 from .datetime_interval import DatetimeInterval
 from .filter import CQL2Filter
 from .opportunity import OpportunityProperties
@@ -84,6 +85,8 @@ class Order[T: OrderStatus](_GeoJsonBase):
     # retrieve them via the API
     id: StrictStr
     type: Literal["Feature"] = "Feature"
+    stapi_type: Literal["Order"] = "Order"
+    stapi_version: str = STAPI_VERSION
 
     geometry: Geometry = Field(...)
     properties: OrderProperties[T] = Field(...)
diff --git a/stapi-pydantic/src/stapi_pydantic/product.py b/stapi-pydantic/src/stapi_pydantic/product.py
index 533a55d..08a89e9 100644
--- a/stapi-pydantic/src/stapi_pydantic/product.py
+++ b/stapi-pydantic/src/stapi_pydantic/product.py
@@ -3,6 +3,7 @@
 
 from pydantic import AnyHttpUrl, BaseModel, Field
 
+from .constants import STAPI_VERSION
 from .shared import Link
 
 type Constraints = BaseModel
@@ -28,7 +29,9 @@ def __init__(self, url: AnyHttpUrl | str, **kwargs: Any) -> None:
 
 
 class Product(BaseModel):
-    type_: Literal["Product"] = Field(default="Product", alias="type")
+    type_: Literal["Collection"] = Field(default="Collection", alias="type")
+    stapi_type: Literal["Product"] = "Product"
+    stapi_version: str = STAPI_VERSION
     conformsTo: list[str] = Field(default_factory=list)
     id: str
     title: str = ""