diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b429f966..db00cae0 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.66.0"
+  ".": "0.67.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 5ad69241..a1640098 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 119
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel/kernel-e66c3f8aedccc39104386a3ec619f3fdcef7e8b00d9e5aa82e414a1b387351c2.yml
-openapi_spec_hash: afeddf18ebc3da1521b3e6f6739411fa
-config_hash: 80eef1b592110714ea55cd26c470fabb
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/kernel/kernel-51549f813f3002e18c6ca8d850cc0c7932828d511c151e0412c73b6798d19e30.yml
+openapi_spec_hash: ee77b293c4bda91c1a32cfdd12b8739e
+config_hash: 57567e00b41af47cef1b78e51b747aa0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index af41d8db..342bd471 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## 0.67.0 (2026-06-11)
+
+Full Changelog: [v0.66.0...v0.67.0](https://github.com/kernel/kernel-python-sdk/compare/v0.66.0...v0.67.0)
+
+### Features
+
+* Add project_id SDK client option mapped to X-Kernel-Project-Id ([1799732](https://github.com/kernel/kernel-python-sdk/commit/17997322232374c6c49d99333b564a0537f247c0))
+
+
+### Documentation
+
+* **api:** correct project-scoping descriptions in OpenAPI spec ([5929332](https://github.com/kernel/kernel-python-sdk/commit/592933283ff7bf0e6596ddbfbc4851e285a1d36e))
+
 ## 0.66.0 (2026-06-10)
 
 Full Changelog: [v0.65.0...v0.66.0](https://github.com/kernel/kernel-python-sdk/compare/v0.65.0...v0.66.0)
diff --git a/pyproject.toml b/pyproject.toml
index c9fef2a6..035e174c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "kernel"
-version = "0.66.0"
+version = "0.67.0"
 description = "The official Python library for the kernel API"
 dynamic = ["readme"]
 license = "Apache-2.0"
diff --git a/src/kernel/_client.py b/src/kernel/_client.py
index 5e7e5e0d..977b83d1 100644
--- a/src/kernel/_client.py
+++ b/src/kernel/_client.py
@@ -100,6 +100,8 @@ class Kernel(SyncAPIClient):
     api_key: str
     browser_route_cache: BrowserRouteCache
 
+    project_id: str | None
+
     _environment: Literal["production", "development"] | NotGiven
     _browser_routing: BrowserRoutingConfig
 
@@ -107,6 +109,7 @@ def __init__(
         self,
         *,
         api_key: str | None = None,
+        project_id: str | None = None,
         environment: Literal["production", "development"] | NotGiven = not_given,
         base_url: str | httpx.URL | None | NotGiven = not_given,
         timeout: float | Timeout | None | NotGiven = not_given,
@@ -140,6 +143,8 @@ def __init__(
             )
         self.api_key = api_key
 
+        self.project_id = project_id
+
         self._environment = environment
 
         base_url_env = os.environ.get("KERNEL_BASE_URL")
@@ -309,6 +314,7 @@ def default_headers(self) -> dict[str, str | Omit]:
         return {
             **super().default_headers,
             "X-Stainless-Async": "false",
+            "X-Kernel-Project-Id": self.project_id if self.project_id is not None else Omit(),
             **self._custom_headers,
         }
 
@@ -347,6 +353,7 @@ def copy(
         self,
         *,
         api_key: str | None = None,
+        project_id: str | None = None,
         environment: Literal["production", "development"] | None = None,
         base_url: str | httpx.URL | None = None,
         timeout: float | Timeout | None | NotGiven = not_given,
@@ -383,6 +390,7 @@ def copy(
         http_client = http_client or self._client
         return self.__class__(
             api_key=api_key or self.api_key,
+            project_id=project_id or self.project_id,
             base_url=base_url or self.base_url,
             environment=environment or self._environment,
             timeout=self.timeout if isinstance(timeout, NotGiven) else timeout,
@@ -437,6 +445,8 @@ class AsyncKernel(AsyncAPIClient):
     api_key: str
     browser_route_cache: BrowserRouteCache
 
+    project_id: str | None
+
     _environment: Literal["production", "development"] | NotGiven
     _browser_routing: BrowserRoutingConfig
 
@@ -444,6 +454,7 @@ def __init__(
         self,
         *,
         api_key: str | None = None,
+        project_id: str | None = None,
         environment: Literal["production", "development"] | NotGiven = not_given,
         base_url: str | httpx.URL | None | NotGiven = not_given,
         timeout: float | Timeout | None | NotGiven = not_given,
@@ -477,6 +488,8 @@ def __init__(
             )
         self.api_key = api_key
 
+        self.project_id = project_id
+
         self._environment = environment
 
         base_url_env = os.environ.get("KERNEL_BASE_URL")
@@ -646,6 +659,7 @@ def default_headers(self) -> dict[str, str | Omit]:
         return {
             **super().default_headers,
             "X-Stainless-Async": f"async:{get_async_library()}",
+            "X-Kernel-Project-Id": self.project_id if self.project_id is not None else Omit(),
             **self._custom_headers,
         }
 
@@ -684,6 +698,7 @@ def copy(
         self,
         *,
         api_key: str | None = None,
+        project_id: str | None = None,
         environment: Literal["production", "development"] | None = None,
         base_url: str | httpx.URL | None = None,
         timeout: float | Timeout | None | NotGiven = not_given,
@@ -720,6 +735,7 @@ def copy(
         http_client = http_client or self._client
         return self.__class__(
             api_key=api_key or self.api_key,
+            project_id=project_id or self.project_id,
             base_url=base_url or self.base_url,
             environment=environment or self._environment,
             timeout=self.timeout if isinstance(timeout, NotGiven) else timeout,
diff --git a/src/kernel/_version.py b/src/kernel/_version.py
index eda0bdfb..7c28de48 100644
--- a/src/kernel/_version.py
+++ b/src/kernel/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "kernel"
-__version__ = "0.66.0"  # x-release-please-version
+__version__ = "0.67.0"  # x-release-please-version
diff --git a/src/kernel/resources/auth/connections.py b/src/kernel/resources/auth/connections.py
index dc912aba..362e6129 100644
--- a/src/kernel/resources/auth/connections.py
+++ b/src/kernel/resources/auth/connections.py
@@ -136,8 +136,8 @@ def create(
 
           login_url: Optional login page URL to skip discovery
 
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Whether to record browser sessions for this connection by default. Useful for
               debugging. Can be overridden per-login. Defaults to false.
@@ -264,8 +264,8 @@ def update(
 
           login_url: Login page URL. Set to empty string to clear.
 
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Whether to record browser sessions for this connection by default
 
@@ -457,8 +457,8 @@ def login(
         credentials are stored.
 
         Args:
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Override the connection's default for recording this login's browser session.
               When omitted, the connection's record_session default is used.
@@ -653,8 +653,8 @@ async def create(
 
           login_url: Optional login page URL to skip discovery
 
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Whether to record browser sessions for this connection by default. Useful for
               debugging. Can be overridden per-login. Defaults to false.
@@ -781,8 +781,8 @@ async def update(
 
           login_url: Login page URL. Set to empty string to clear.
 
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Whether to record browser sessions for this connection by default
 
@@ -974,8 +974,8 @@ async def login(
         credentials are stored.
 
         Args:
-          proxy: Proxy selection. Provide either id or name. The proxy must belong to the
-              caller's org.
+          proxy: Proxy selection. Provide either id or name. The proxy must be in the same
+              project as the resource referencing it.
 
           record_session: Override the connection's default for recording this login's browser session.
               When omitted, the connection's record_session default is used.
diff --git a/src/kernel/resources/browser_pools.py b/src/kernel/resources/browser_pools.py
index 5099f446..fc32c951 100644
--- a/src/kernel/resources/browser_pools.py
+++ b/src/kernel/resources/browser_pools.py
@@ -109,8 +109,8 @@ def create(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           start_url: Optional URL to navigate to when a new browser is warmed into the pool.
               Best-effort: failures to navigate do not fail pool fill. Only applied to
@@ -256,8 +256,8 @@ def update(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           size: Number of browsers to maintain in the pool. The maximum size is determined by
               your organization's pooled sessions limit (the sum of all pool sizes cannot
@@ -338,7 +338,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> SyncOffsetPagination[BrowserPool]:
         """
-        List browser pools owned by the caller's organization.
+        List browser pools in the resolved project.
 
         Args:
           limit: Limit the number of browser pools to return.
@@ -630,8 +630,8 @@ async def create(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           start_url: Optional URL to navigate to when a new browser is warmed into the pool.
               Best-effort: failures to navigate do not fail pool fill. Only applied to
@@ -777,8 +777,8 @@ async def update(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           size: Number of browsers to maintain in the pool. The maximum size is determined by
               your organization's pooled sessions limit (the sum of all pool sizes cannot
@@ -859,7 +859,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> AsyncPaginator[BrowserPool, AsyncOffsetPagination[BrowserPool]]:
         """
-        List browser pools owned by the caller's organization.
+        List browser pools in the resolved project.
 
         Args:
           limit: Limit the number of browser pools to return.
diff --git a/src/kernel/resources/browsers/browsers.py b/src/kernel/resources/browsers/browsers.py
index c5c365e6..a5564b84 100644
--- a/src/kernel/resources/browsers/browsers.py
+++ b/src/kernel/resources/browsers/browsers.py
@@ -216,8 +216,8 @@ def create(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           start_url: Optional URL to open when the browser session is created. Navigation is
               best-effort, so navigation failures do not prevent the session from being
@@ -794,8 +794,8 @@ async def create(
               specified, the matching profile will be loaded into the browser session.
               Profiles must be created beforehand.
 
-          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy
-              belonging to the caller's org.
+          proxy_id: Optional proxy to associate to the browser session. Must reference a proxy in
+              the same project as the browser session.
 
           start_url: Optional URL to open when the browser session is created. Navigation is
               best-effort, so navigation failures do not prevent the session from being
diff --git a/src/kernel/resources/credentials.py b/src/kernel/resources/credentials.py
index 7d00faab..4c90ef85 100644
--- a/src/kernel/resources/credentials.py
+++ b/src/kernel/resources/credentials.py
@@ -212,10 +212,9 @@ def list(
         extra_body: Body | None = None,
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> SyncOffsetPagination[Credential]:
-        """List credentials owned by the caller's organization.
+        """List credentials in the resolved project.
 
-        Credential values are not
-        returned.
+        Credential values are not returned.
 
         Args:
           domain: Filter by domain
@@ -509,10 +508,9 @@ def list(
         extra_body: Body | None = None,
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> AsyncPaginator[Credential, AsyncOffsetPagination[Credential]]:
-        """List credentials owned by the caller's organization.
+        """List credentials in the resolved project.
 
-        Credential values are not
-        returned.
+        Credential values are not returned.
 
         Args:
           domain: Filter by domain
diff --git a/src/kernel/resources/extensions.py b/src/kernel/resources/extensions.py
index 5b7215be..8d7acb14 100644
--- a/src/kernel/resources/extensions.py
+++ b/src/kernel/resources/extensions.py
@@ -70,7 +70,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> SyncOffsetPagination[ExtensionListResponse]:
         """
-        List extensions owned by the caller's organization.
+        List extensions in the resolved project.
 
         Args:
           limit: Limit the number of extensions to return.
@@ -308,7 +308,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> AsyncPaginator[ExtensionListResponse, AsyncOffsetPagination[ExtensionListResponse]]:
         """
-        List extensions owned by the caller's organization.
+        List extensions in the resolved project.
 
         Args:
           limit: Limit the number of extensions to return.
diff --git a/src/kernel/resources/proxies.py b/src/kernel/resources/proxies.py
index 2239a854..831e7819 100644
--- a/src/kernel/resources/proxies.py
+++ b/src/kernel/resources/proxies.py
@@ -65,7 +65,7 @@ def create(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> ProxyCreateResponse:
         """
-        Create a new proxy configuration for the caller's organization.
+        Create a new proxy configuration in the resolved project.
 
         Args:
           type: Proxy type to use. In terms of quality for avoiding bot-detection, from best to
@@ -117,7 +117,7 @@ def retrieve(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> ProxyRetrieveResponse:
         """
-        Retrieve a proxy belonging to the caller's organization by ID.
+        Retrieve a proxy in the resolved project by ID.
 
         Args:
           extra_headers: Send extra headers
@@ -151,7 +151,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> SyncOffsetPagination[ProxyListResponse]:
         """
-        List proxies owned by the caller's organization.
+        List proxies in the resolved project.
 
         Args:
           limit: Limit the number of proxies to return.
@@ -313,7 +313,7 @@ async def create(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> ProxyCreateResponse:
         """
-        Create a new proxy configuration for the caller's organization.
+        Create a new proxy configuration in the resolved project.
 
         Args:
           type: Proxy type to use. In terms of quality for avoiding bot-detection, from best to
@@ -365,7 +365,7 @@ async def retrieve(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> ProxyRetrieveResponse:
         """
-        Retrieve a proxy belonging to the caller's organization by ID.
+        Retrieve a proxy in the resolved project by ID.
 
         Args:
           extra_headers: Send extra headers
@@ -399,7 +399,7 @@ def list(
         timeout: float | httpx.Timeout | None | NotGiven = not_given,
     ) -> AsyncPaginator[ProxyListResponse, AsyncOffsetPagination[ProxyListResponse]]:
         """
-        List proxies owned by the caller's organization.
+        List proxies in the resolved project.
 
         Args:
           limit: Limit the number of proxies to return.
diff --git a/src/kernel/types/auth/connection_create_params.py b/src/kernel/types/auth/connection_create_params.py
index acde944c..e5a969ce 100644
--- a/src/kernel/types/auth/connection_create_params.py
+++ b/src/kernel/types/auth/connection_create_params.py
@@ -83,7 +83,8 @@ class ConnectionCreateParams(TypedDict, total=False):
     proxy: Proxy
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource
+    referencing it.
     """
 
     record_session: bool
@@ -124,7 +125,7 @@ class Credential(TypedDict, total=False):
 class Proxy(TypedDict, total=False):
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource referencing it.
     """
 
     id: str
diff --git a/src/kernel/types/auth/connection_login_params.py b/src/kernel/types/auth/connection_login_params.py
index 39756cb1..5e136cc3 100644
--- a/src/kernel/types/auth/connection_login_params.py
+++ b/src/kernel/types/auth/connection_login_params.py
@@ -11,7 +11,8 @@ class ConnectionLoginParams(TypedDict, total=False):
     proxy: Proxy
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource
+    referencing it.
     """
 
     record_session: bool
@@ -24,7 +25,7 @@ class ConnectionLoginParams(TypedDict, total=False):
 class Proxy(TypedDict, total=False):
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource referencing it.
     """
 
     id: str
diff --git a/src/kernel/types/auth/connection_update_params.py b/src/kernel/types/auth/connection_update_params.py
index 8875f609..e0dadf70 100644
--- a/src/kernel/types/auth/connection_update_params.py
+++ b/src/kernel/types/auth/connection_update_params.py
@@ -50,7 +50,8 @@ class ConnectionUpdateParams(TypedDict, total=False):
     proxy: Proxy
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource
+    referencing it.
     """
 
     record_session: bool
@@ -85,7 +86,7 @@ class Credential(TypedDict, total=False):
 class Proxy(TypedDict, total=False):
     """Proxy selection.
 
-    Provide either id or name. The proxy must belong to the caller's org.
+    Provide either id or name. The proxy must be in the same project as the resource referencing it.
     """
 
     id: str
diff --git a/src/kernel/types/browser_create_params.py b/src/kernel/types/browser_create_params.py
index 01308f38..10d53936 100644
--- a/src/kernel/types/browser_create_params.py
+++ b/src/kernel/types/browser_create_params.py
@@ -67,7 +67,7 @@ class BrowserCreateParams(TypedDict, total=False):
     proxy_id: str
     """Optional proxy to associate to the browser session.
 
-    Must reference a proxy belonging to the caller's org.
+    Must reference a proxy in the same project as the browser session.
     """
 
     start_url: str
diff --git a/src/kernel/types/browser_pool.py b/src/kernel/types/browser_pool.py
index 8ead6807..8ad50acf 100644
--- a/src/kernel/types/browser_pool.py
+++ b/src/kernel/types/browser_pool.py
@@ -60,7 +60,7 @@ class BrowserPoolConfig(BaseModel):
     proxy_id: Optional[str] = None
     """Optional proxy to associate to the browser session.
 
-    Must reference a proxy belonging to the caller's org.
+    Must reference a proxy in the same project as the browser session.
     """
 
     start_url: Optional[str] = None
diff --git a/src/kernel/types/browser_pool_create_params.py b/src/kernel/types/browser_pool_create_params.py
index 1ffeeb75..33d04ce4 100644
--- a/src/kernel/types/browser_pool_create_params.py
+++ b/src/kernel/types/browser_pool_create_params.py
@@ -59,7 +59,7 @@ class BrowserPoolCreateParams(TypedDict, total=False):
     proxy_id: str
     """Optional proxy to associate to the browser session.
 
-    Must reference a proxy belonging to the caller's org.
+    Must reference a proxy in the same project as the browser session.
     """
 
     start_url: str
diff --git a/src/kernel/types/browser_pool_update_params.py b/src/kernel/types/browser_pool_update_params.py
index 07501695..e80b5aa0 100644
--- a/src/kernel/types/browser_pool_update_params.py
+++ b/src/kernel/types/browser_pool_update_params.py
@@ -58,7 +58,7 @@ class BrowserPoolUpdateParams(TypedDict, total=False):
     proxy_id: str
     """Optional proxy to associate to the browser session.
 
-    Must reference a proxy belonging to the caller's org.
+    Must reference a proxy in the same project as the browser session.
     """
 
     size: int